http://git-wip-us.apache.org/repos/asf/hbase-site/blob/e2f20c83/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html index 8609df1..601ad09 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.StatisticsThread.html @@ -361,1266 +361,1267 @@ <span class="sourceLineNo">353</span> return this.cacheEnabled;<a name="line.353"></a> <span class="sourceLineNo">354</span> }<a name="line.354"></a> <span class="sourceLineNo">355</span><a name="line.355"></a> -<span class="sourceLineNo">356</span> public long getMaxSize() {<a name="line.356"></a> -<span class="sourceLineNo">357</span> return this.cacheCapacity;<a name="line.357"></a> -<span class="sourceLineNo">358</span> }<a name="line.358"></a> -<span class="sourceLineNo">359</span><a name="line.359"></a> -<span class="sourceLineNo">360</span> public String getIoEngine() {<a name="line.360"></a> -<span class="sourceLineNo">361</span> return ioEngine.toString();<a name="line.361"></a> -<span class="sourceLineNo">362</span> }<a name="line.362"></a> -<span class="sourceLineNo">363</span><a name="line.363"></a> -<span class="sourceLineNo">364</span> /**<a name="line.364"></a> -<span class="sourceLineNo">365</span> * Get the IOEngine from the IO engine name<a name="line.365"></a> -<span class="sourceLineNo">366</span> * @param ioEngineName<a name="line.366"></a> -<span class="sourceLineNo">367</span> * @param capacity<a name="line.367"></a> -<span class="sourceLineNo">368</span> * @param persistencePath<a name="line.368"></a> -<span class="sourceLineNo">369</span> * @return the IOEngine<a name="line.369"></a> -<span class="sourceLineNo">370</span> * @throws IOException<a name="line.370"></a> -<span class="sourceLineNo">371</span> */<a name="line.371"></a> -<span class="sourceLineNo">372</span> private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)<a name="line.372"></a> -<span class="sourceLineNo">373</span> throws IOException {<a name="line.373"></a> -<span class="sourceLineNo">374</span> if (ioEngineName.startsWith("file:") || ioEngineName.startsWith("files:")) {<a name="line.374"></a> -<span class="sourceLineNo">375</span> // In order to make the usage simple, we only need the prefix 'files:' in<a name="line.375"></a> -<span class="sourceLineNo">376</span> // document whether one or multiple file(s), but also support 'file:' for<a name="line.376"></a> -<span class="sourceLineNo">377</span> // the compatibility<a name="line.377"></a> -<span class="sourceLineNo">378</span> String[] filePaths = ioEngineName.substring(ioEngineName.indexOf(":") + 1)<a name="line.378"></a> -<span class="sourceLineNo">379</span> .split(FileIOEngine.FILE_DELIMITER);<a name="line.379"></a> -<span class="sourceLineNo">380</span> return new FileIOEngine(capacity, persistencePath != null, filePaths);<a name="line.380"></a> -<span class="sourceLineNo">381</span> } else if (ioEngineName.startsWith("offheap")) {<a name="line.381"></a> -<span class="sourceLineNo">382</span> return new ByteBufferIOEngine(capacity, true);<a name="line.382"></a> -<span class="sourceLineNo">383</span> } else if (ioEngineName.startsWith("heap")) {<a name="line.383"></a> -<span class="sourceLineNo">384</span> return new ByteBufferIOEngine(capacity, false);<a name="line.384"></a> -<span class="sourceLineNo">385</span> } else if (ioEngineName.startsWith("mmap:")) {<a name="line.385"></a> -<span class="sourceLineNo">386</span> return new FileMmapEngine(ioEngineName.substring(5), capacity);<a name="line.386"></a> -<span class="sourceLineNo">387</span> } else {<a name="line.387"></a> -<span class="sourceLineNo">388</span> throw new IllegalArgumentException(<a name="line.388"></a> -<span class="sourceLineNo">389</span> "Don't understand io engine name for cache - prefix with file:, heap or offheap");<a name="line.389"></a> -<span class="sourceLineNo">390</span> }<a name="line.390"></a> -<span class="sourceLineNo">391</span> }<a name="line.391"></a> -<span class="sourceLineNo">392</span><a name="line.392"></a> -<span class="sourceLineNo">393</span> /**<a name="line.393"></a> -<span class="sourceLineNo">394</span> * Cache the block with the specified name and buffer.<a name="line.394"></a> -<span class="sourceLineNo">395</span> * @param cacheKey block's cache key<a name="line.395"></a> -<span class="sourceLineNo">396</span> * @param buf block buffer<a name="line.396"></a> -<span class="sourceLineNo">397</span> */<a name="line.397"></a> -<span class="sourceLineNo">398</span> @Override<a name="line.398"></a> -<span class="sourceLineNo">399</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {<a name="line.399"></a> -<span class="sourceLineNo">400</span> cacheBlock(cacheKey, buf, false, false);<a name="line.400"></a> -<span class="sourceLineNo">401</span> }<a name="line.401"></a> -<span class="sourceLineNo">402</span><a name="line.402"></a> -<span class="sourceLineNo">403</span> /**<a name="line.403"></a> -<span class="sourceLineNo">404</span> * Cache the block with the specified name and buffer.<a name="line.404"></a> -<span class="sourceLineNo">405</span> * @param cacheKey block's cache key<a name="line.405"></a> -<span class="sourceLineNo">406</span> * @param cachedItem block buffer<a name="line.406"></a> -<span class="sourceLineNo">407</span> * @param inMemory if block is in-memory<a name="line.407"></a> -<span class="sourceLineNo">408</span> * @param cacheDataInL1<a name="line.408"></a> -<span class="sourceLineNo">409</span> */<a name="line.409"></a> -<span class="sourceLineNo">410</span> @Override<a name="line.410"></a> -<span class="sourceLineNo">411</span> public void cacheBlock(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.411"></a> -<span class="sourceLineNo">412</span> final boolean cacheDataInL1) {<a name="line.412"></a> -<span class="sourceLineNo">413</span> cacheBlockWithWait(cacheKey, cachedItem, inMemory, wait_when_cache);<a name="line.413"></a> -<span class="sourceLineNo">414</span> }<a name="line.414"></a> -<span class="sourceLineNo">415</span><a name="line.415"></a> -<span class="sourceLineNo">416</span> /**<a name="line.416"></a> -<span class="sourceLineNo">417</span> * Cache the block to ramCache<a name="line.417"></a> -<span class="sourceLineNo">418</span> * @param cacheKey block's cache key<a name="line.418"></a> -<span class="sourceLineNo">419</span> * @param cachedItem block buffer<a name="line.419"></a> -<span class="sourceLineNo">420</span> * @param inMemory if block is in-memory<a name="line.420"></a> -<span class="sourceLineNo">421</span> * @param wait if true, blocking wait when queue is full<a name="line.421"></a> -<span class="sourceLineNo">422</span> */<a name="line.422"></a> -<span class="sourceLineNo">423</span> public void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.423"></a> -<span class="sourceLineNo">424</span> boolean wait) {<a name="line.424"></a> -<span class="sourceLineNo">425</span> if (LOG.isTraceEnabled()) LOG.trace("Caching key=" + cacheKey + ", item=" + cachedItem);<a name="line.425"></a> -<span class="sourceLineNo">426</span> if (!cacheEnabled) {<a name="line.426"></a> -<span class="sourceLineNo">427</span> return;<a name="line.427"></a> -<span class="sourceLineNo">428</span> }<a name="line.428"></a> -<span class="sourceLineNo">429</span><a name="line.429"></a> -<span class="sourceLineNo">430</span> if (backingMap.containsKey(cacheKey)) {<a name="line.430"></a> -<span class="sourceLineNo">431</span> return;<a name="line.431"></a> -<span class="sourceLineNo">432</span> }<a name="line.432"></a> -<span class="sourceLineNo">433</span><a name="line.433"></a> -<span class="sourceLineNo">434</span> /*<a name="line.434"></a> -<span class="sourceLineNo">435</span> * Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.435"></a> -<span class="sourceLineNo">436</span> */<a name="line.436"></a> -<span class="sourceLineNo">437</span> RAMQueueEntry re =<a name="line.437"></a> -<span class="sourceLineNo">438</span> new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.438"></a> -<span class="sourceLineNo">439</span> if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.439"></a> -<span class="sourceLineNo">440</span> return;<a name="line.440"></a> -<span class="sourceLineNo">441</span> }<a name="line.441"></a> -<span class="sourceLineNo">442</span> int queueNum = (cacheKey.hashCode() & 0x7FFFFFFF) % writerQueues.size();<a name="line.442"></a> -<span class="sourceLineNo">443</span> BlockingQueue<RAMQueueEntry> bq = writerQueues.get(queueNum);<a name="line.443"></a> -<span class="sourceLineNo">444</span> boolean successfulAddition = false;<a name="line.444"></a> -<span class="sourceLineNo">445</span> if (wait) {<a name="line.445"></a> -<span class="sourceLineNo">446</span> try {<a name="line.446"></a> -<span class="sourceLineNo">447</span> successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.447"></a> -<span class="sourceLineNo">448</span> } catch (InterruptedException e) {<a name="line.448"></a> -<span class="sourceLineNo">449</span> Thread.currentThread().interrupt();<a name="line.449"></a> -<span class="sourceLineNo">450</span> }<a name="line.450"></a> -<span class="sourceLineNo">451</span> } else {<a name="line.451"></a> -<span class="sourceLineNo">452</span> successfulAddition = bq.offer(re);<a name="line.452"></a> -<span class="sourceLineNo">453</span> }<a name="line.453"></a> -<span class="sourceLineNo">454</span> if (!successfulAddition) {<a name="line.454"></a> -<span class="sourceLineNo">455</span> ramCache.remove(cacheKey);<a name="line.455"></a> -<span class="sourceLineNo">456</span> cacheStats.failInsert();<a name="line.456"></a> -<span class="sourceLineNo">457</span> } else {<a name="line.457"></a> -<span class="sourceLineNo">458</span> this.blockNumber.incrementAndGet();<a name="line.458"></a> -<span class="sourceLineNo">459</span> this.heapSize.addAndGet(cachedItem.heapSize());<a name="line.459"></a> -<span class="sourceLineNo">460</span> blocksByHFile.add(cacheKey);<a name="line.460"></a> -<span class="sourceLineNo">461</span> }<a name="line.461"></a> -<span class="sourceLineNo">462</span> }<a name="line.462"></a> -<span class="sourceLineNo">463</span><a name="line.463"></a> -<span class="sourceLineNo">464</span> /**<a name="line.464"></a> -<span class="sourceLineNo">465</span> * Get the buffer of the block with the specified key.<a name="line.465"></a> -<span class="sourceLineNo">466</span> * @param key block's cache key<a name="line.466"></a> -<span class="sourceLineNo">467</span> * @param caching true if the caller caches blocks on cache misses<a name="line.467"></a> -<span class="sourceLineNo">468</span> * @param repeat Whether this is a repeat lookup for the same block<a name="line.468"></a> -<span class="sourceLineNo">469</span> * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.469"></a> -<span class="sourceLineNo">470</span> * @return buffer of specified cache key, or null if not in cache<a name="line.470"></a> -<span class="sourceLineNo">471</span> */<a name="line.471"></a> -<span class="sourceLineNo">472</span> @Override<a name="line.472"></a> -<span class="sourceLineNo">473</span> public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.473"></a> -<span class="sourceLineNo">474</span> boolean updateCacheMetrics) {<a name="line.474"></a> -<span class="sourceLineNo">475</span> if (!cacheEnabled) {<a name="line.475"></a> -<span class="sourceLineNo">476</span> return null;<a name="line.476"></a> -<span class="sourceLineNo">477</span> }<a name="line.477"></a> -<span class="sourceLineNo">478</span> RAMQueueEntry re = ramCache.get(key);<a name="line.478"></a> -<span class="sourceLineNo">479</span> if (re != null) {<a name="line.479"></a> -<span class="sourceLineNo">480</span> if (updateCacheMetrics) {<a name="line.480"></a> -<span class="sourceLineNo">481</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.481"></a> -<span class="sourceLineNo">482</span> }<a name="line.482"></a> -<span class="sourceLineNo">483</span> re.access(accessCount.incrementAndGet());<a name="line.483"></a> -<span class="sourceLineNo">484</span> return re.getData();<a name="line.484"></a> -<span class="sourceLineNo">485</span> }<a name="line.485"></a> -<span class="sourceLineNo">486</span> BucketEntry bucketEntry = backingMap.get(key);<a name="line.486"></a> -<span class="sourceLineNo">487</span> if (bucketEntry != null) {<a name="line.487"></a> -<span class="sourceLineNo">488</span> long start = System.nanoTime();<a name="line.488"></a> -<span class="sourceLineNo">489</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.489"></a> -<span class="sourceLineNo">490</span> try {<a name="line.490"></a> -<span class="sourceLineNo">491</span> lock.readLock().lock();<a name="line.491"></a> -<span class="sourceLineNo">492</span> // We can not read here even if backingMap does contain the given key because its offset<a name="line.492"></a> -<span class="sourceLineNo">493</span> // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.493"></a> -<span class="sourceLineNo">494</span> // existence here.<a name="line.494"></a> -<span class="sourceLineNo">495</span> if (bucketEntry.equals(backingMap.get(key))) {<a name="line.495"></a> -<span class="sourceLineNo">496</span> // TODO : change this area - should be removed after server cells and<a name="line.496"></a> -<span class="sourceLineNo">497</span> // 12295 are available<a name="line.497"></a> -<span class="sourceLineNo">498</span> int len = bucketEntry.getLength();<a name="line.498"></a> -<span class="sourceLineNo">499</span> if (LOG.isTraceEnabled()) {<a name="line.499"></a> -<span class="sourceLineNo">500</span> LOG.trace("Read offset=" + bucketEntry.offset() + ", len=" + len);<a name="line.500"></a> -<span class="sourceLineNo">501</span> }<a name="line.501"></a> -<span class="sourceLineNo">502</span> Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.502"></a> -<span class="sourceLineNo">503</span> bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.503"></a> -<span class="sourceLineNo">504</span> long timeTaken = System.nanoTime() - start;<a name="line.504"></a> -<span class="sourceLineNo">505</span> if (updateCacheMetrics) {<a name="line.505"></a> -<span class="sourceLineNo">506</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.506"></a> -<span class="sourceLineNo">507</span> cacheStats.ioHit(timeTaken);<a name="line.507"></a> -<span class="sourceLineNo">508</span> }<a name="line.508"></a> -<span class="sourceLineNo">509</span> if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.509"></a> -<span class="sourceLineNo">510</span> bucketEntry.refCount.incrementAndGet();<a name="line.510"></a> -<span class="sourceLineNo">511</span> }<a name="line.511"></a> -<span class="sourceLineNo">512</span> bucketEntry.access(accessCount.incrementAndGet());<a name="line.512"></a> -<span class="sourceLineNo">513</span> if (this.ioErrorStartTime > 0) {<a name="line.513"></a> -<span class="sourceLineNo">514</span> ioErrorStartTime = -1;<a name="line.514"></a> -<span class="sourceLineNo">515</span> }<a name="line.515"></a> -<span class="sourceLineNo">516</span> return cachedBlock;<a name="line.516"></a> -<span class="sourceLineNo">517</span> }<a name="line.517"></a> -<span class="sourceLineNo">518</span> } catch (IOException ioex) {<a name="line.518"></a> -<span class="sourceLineNo">519</span> LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.519"></a> -<span class="sourceLineNo">520</span> checkIOErrorIsTolerated();<a name="line.520"></a> -<span class="sourceLineNo">521</span> } finally {<a name="line.521"></a> -<span class="sourceLineNo">522</span> lock.readLock().unlock();<a name="line.522"></a> -<span class="sourceLineNo">523</span> }<a name="line.523"></a> -<span class="sourceLineNo">524</span> }<a name="line.524"></a> -<span class="sourceLineNo">525</span> if (!repeat && updateCacheMetrics) {<a name="line.525"></a> -<span class="sourceLineNo">526</span> cacheStats.miss(caching, key.isPrimary(), key.getBlockType());<a name="line.526"></a> -<span class="sourceLineNo">527</span> }<a name="line.527"></a> -<span class="sourceLineNo">528</span> return null;<a name="line.528"></a> -<span class="sourceLineNo">529</span> }<a name="line.529"></a> -<span class="sourceLineNo">530</span><a name="line.530"></a> -<span class="sourceLineNo">531</span> @VisibleForTesting<a name="line.531"></a> -<span class="sourceLineNo">532</span> void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.532"></a> -<span class="sourceLineNo">533</span> bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.533"></a> -<span class="sourceLineNo">534</span> realCacheSize.addAndGet(-1 * bucketEntry.getLength());<a name="line.534"></a> -<span class="sourceLineNo">535</span> blocksByHFile.remove(cacheKey);<a name="line.535"></a> -<span class="sourceLineNo">536</span> if (decrementBlockNumber) {<a name="line.536"></a> -<span class="sourceLineNo">537</span> this.blockNumber.decrementAndGet();<a name="line.537"></a> -<span class="sourceLineNo">538</span> }<a name="line.538"></a> -<span class="sourceLineNo">539</span> }<a name="line.539"></a> -<span class="sourceLineNo">540</span><a name="line.540"></a> -<span class="sourceLineNo">541</span> @Override<a name="line.541"></a> -<span class="sourceLineNo">542</span> public boolean evictBlock(BlockCacheKey cacheKey) {<a name="line.542"></a> -<span class="sourceLineNo">543</span> return evictBlock(cacheKey, true);<a name="line.543"></a> -<span class="sourceLineNo">544</span> }<a name="line.544"></a> -<span class="sourceLineNo">545</span><a name="line.545"></a> -<span class="sourceLineNo">546</span> // does not check for the ref count. Just tries to evict it if found in the<a name="line.546"></a> -<span class="sourceLineNo">547</span> // bucket map<a name="line.547"></a> -<span class="sourceLineNo">548</span> private boolean forceEvict(BlockCacheKey cacheKey) {<a name="line.548"></a> -<span class="sourceLineNo">549</span> if (!cacheEnabled) {<a name="line.549"></a> -<span class="sourceLineNo">550</span> return false;<a name="line.550"></a> -<span class="sourceLineNo">551</span> }<a name="line.551"></a> -<span class="sourceLineNo">552</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.552"></a> -<span class="sourceLineNo">553</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.553"></a> -<span class="sourceLineNo">554</span> if (bucketEntry == null) {<a name="line.554"></a> -<span class="sourceLineNo">555</span> if (removedBlock != null) {<a name="line.555"></a> -<span class="sourceLineNo">556</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.556"></a> -<span class="sourceLineNo">557</span> return true;<a name="line.557"></a> -<span class="sourceLineNo">558</span> } else {<a name="line.558"></a> -<span class="sourceLineNo">559</span> return false;<a name="line.559"></a> -<span class="sourceLineNo">560</span> }<a name="line.560"></a> -<span class="sourceLineNo">561</span> }<a name="line.561"></a> -<span class="sourceLineNo">562</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.562"></a> -<span class="sourceLineNo">563</span> try {<a name="line.563"></a> -<span class="sourceLineNo">564</span> lock.writeLock().lock();<a name="line.564"></a> -<span class="sourceLineNo">565</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.565"></a> -<span class="sourceLineNo">566</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.566"></a> -<span class="sourceLineNo">567</span> } else {<a name="line.567"></a> -<span class="sourceLineNo">568</span> return false;<a name="line.568"></a> -<span class="sourceLineNo">569</span> }<a name="line.569"></a> -<span class="sourceLineNo">570</span> } finally {<a name="line.570"></a> -<span class="sourceLineNo">571</span> lock.writeLock().unlock();<a name="line.571"></a> -<span class="sourceLineNo">572</span> }<a name="line.572"></a> -<span class="sourceLineNo">573</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.573"></a> -<span class="sourceLineNo">574</span> return true;<a name="line.574"></a> -<span class="sourceLineNo">575</span> }<a name="line.575"></a> -<span class="sourceLineNo">576</span><a name="line.576"></a> -<span class="sourceLineNo">577</span> private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.577"></a> -<span class="sourceLineNo">578</span> RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.578"></a> -<span class="sourceLineNo">579</span> if (removedBlock != null) {<a name="line.579"></a> -<span class="sourceLineNo">580</span> this.blockNumber.decrementAndGet();<a name="line.580"></a> -<span class="sourceLineNo">581</span> this.heapSize.addAndGet(-1 * removedBlock.getData().heapSize());<a name="line.581"></a> -<span class="sourceLineNo">582</span> }<a name="line.582"></a> -<span class="sourceLineNo">583</span> return removedBlock;<a name="line.583"></a> -<span class="sourceLineNo">584</span> }<a name="line.584"></a> -<span class="sourceLineNo">585</span><a name="line.585"></a> -<span class="sourceLineNo">586</span> public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.586"></a> -<span class="sourceLineNo">587</span> if (!cacheEnabled) {<a name="line.587"></a> -<span class="sourceLineNo">588</span> return false;<a name="line.588"></a> -<span class="sourceLineNo">589</span> }<a name="line.589"></a> -<span class="sourceLineNo">590</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.590"></a> -<span class="sourceLineNo">591</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.591"></a> -<span class="sourceLineNo">592</span> if (bucketEntry == null) {<a name="line.592"></a> -<span class="sourceLineNo">593</span> if (removedBlock != null) {<a name="line.593"></a> -<span class="sourceLineNo">594</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.594"></a> -<span class="sourceLineNo">595</span> return true;<a name="line.595"></a> -<span class="sourceLineNo">596</span> } else {<a name="line.596"></a> -<span class="sourceLineNo">597</span> return false;<a name="line.597"></a> -<span class="sourceLineNo">598</span> }<a name="line.598"></a> -<span class="sourceLineNo">599</span> }<a name="line.599"></a> -<span class="sourceLineNo">600</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.600"></a> -<span class="sourceLineNo">601</span> try {<a name="line.601"></a> -<span class="sourceLineNo">602</span> lock.writeLock().lock();<a name="line.602"></a> -<span class="sourceLineNo">603</span> int refCount = bucketEntry.refCount.get();<a name="line.603"></a> -<span class="sourceLineNo">604</span> if(refCount == 0) {<a name="line.604"></a> -<span class="sourceLineNo">605</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.605"></a> -<span class="sourceLineNo">606</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.606"></a> -<span class="sourceLineNo">607</span> } else {<a name="line.607"></a> -<span class="sourceLineNo">608</span> return false;<a name="line.608"></a> -<span class="sourceLineNo">609</span> }<a name="line.609"></a> -<span class="sourceLineNo">610</span> } else {<a name="line.610"></a> -<span class="sourceLineNo">611</span> if(!deletedBlock) {<a name="line.611"></a> -<span class="sourceLineNo">612</span> if (LOG.isDebugEnabled()) {<a name="line.612"></a> -<span class="sourceLineNo">613</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.613"></a> -<span class="sourceLineNo">614</span> + " readers. Can not be freed now");<a name="line.614"></a> -<span class="sourceLineNo">615</span> }<a name="line.615"></a> -<span class="sourceLineNo">616</span> return false;<a name="line.616"></a> -<span class="sourceLineNo">617</span> } else {<a name="line.617"></a> -<span class="sourceLineNo">618</span> if (LOG.isDebugEnabled()) {<a name="line.618"></a> -<span class="sourceLineNo">619</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.619"></a> -<span class="sourceLineNo">620</span> + " readers. Can not be freed now. Hence will mark this"<a name="line.620"></a> -<span class="sourceLineNo">621</span> + " for evicting at a later point");<a name="line.621"></a> -<span class="sourceLineNo">622</span> }<a name="line.622"></a> -<span class="sourceLineNo">623</span> bucketEntry.markedForEvict = true;<a name="line.623"></a> -<span class="sourceLineNo">624</span> }<a name="line.624"></a> -<span class="sourceLineNo">625</span> }<a name="line.625"></a> -<span class="sourceLineNo">626</span> } finally {<a name="line.626"></a> -<span class="sourceLineNo">627</span> lock.writeLock().unlock();<a name="line.627"></a> -<span class="sourceLineNo">628</span> }<a name="line.628"></a> -<span class="sourceLineNo">629</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.629"></a> -<span class="sourceLineNo">630</span> return true;<a name="line.630"></a> -<span class="sourceLineNo">631</span> }<a name="line.631"></a> -<span class="sourceLineNo">632</span><a name="line.632"></a> -<span class="sourceLineNo">633</span> /*<a name="line.633"></a> -<span class="sourceLineNo">634</span> * Statistics thread. Periodically output cache statistics to the log.<a name="line.634"></a> -<span class="sourceLineNo">635</span> */<a name="line.635"></a> -<span class="sourceLineNo">636</span> private static class StatisticsThread extends Thread {<a name="line.636"></a> -<span class="sourceLineNo">637</span> private final BucketCache bucketCache;<a name="line.637"></a> -<span class="sourceLineNo">638</span><a name="line.638"></a> -<span class="sourceLineNo">639</span> public StatisticsThread(BucketCache bucketCache) {<a name="line.639"></a> -<span class="sourceLineNo">640</span> super("BucketCacheStatsThread");<a name="line.640"></a> -<span class="sourceLineNo">641</span> setDaemon(true);<a name="line.641"></a> -<span class="sourceLineNo">642</span> this.bucketCache = bucketCache;<a name="line.642"></a> -<span class="sourceLineNo">643</span> }<a name="line.643"></a> -<span class="sourceLineNo">644</span><a name="line.644"></a> -<span class="sourceLineNo">645</span> @Override<a name="line.645"></a> -<span class="sourceLineNo">646</span> public void run() {<a name="line.646"></a> -<span class="sourceLineNo">647</span> bucketCache.logStats();<a name="line.647"></a> -<span class="sourceLineNo">648</span> }<a name="line.648"></a> -<span class="sourceLineNo">649</span> }<a name="line.649"></a> -<span class="sourceLineNo">650</span><a name="line.650"></a> -<span class="sourceLineNo">651</span> public void logStats() {<a name="line.651"></a> -<span class="sourceLineNo">652</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.652"></a> -<span class="sourceLineNo">653</span> long usedSize = bucketAllocator.getUsedSize();<a name="line.653"></a> -<span class="sourceLineNo">654</span> long freeSize = totalSize - usedSize;<a name="line.654"></a> -<span class="sourceLineNo">655</span> long cacheSize = getRealCacheSize();<a name="line.655"></a> -<span class="sourceLineNo">656</span> LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.656"></a> -<span class="sourceLineNo">657</span> "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.657"></a> -<span class="sourceLineNo">658</span> "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.658"></a> -<span class="sourceLineNo">659</span> "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.659"></a> -<span class="sourceLineNo">660</span> "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.660"></a> -<span class="sourceLineNo">661</span> "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.661"></a> -<span class="sourceLineNo">662</span> "hits=" + cacheStats.getHitCount() + ", " +<a name="line.662"></a> -<span class="sourceLineNo">663</span> "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.663"></a> -<span class="sourceLineNo">664</span> "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.664"></a> -<span class="sourceLineNo">665</span> "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.665"></a> -<span class="sourceLineNo">666</span> (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.666"></a> -<span class="sourceLineNo">667</span> "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.667"></a> -<span class="sourceLineNo">668</span> "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.668"></a> -<span class="sourceLineNo">669</span> "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.669"></a> -<span class="sourceLineNo">670</span> (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.670"></a> -<span class="sourceLineNo">671</span> "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.671"></a> -<span class="sourceLineNo">672</span> "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.672"></a> -<span class="sourceLineNo">673</span> "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.673"></a> -<span class="sourceLineNo">674</span> cacheStats.reset();<a name="line.674"></a> -<span class="sourceLineNo">675</span> }<a name="line.675"></a> -<span class="sourceLineNo">676</span><a name="line.676"></a> -<span class="sourceLineNo">677</span> public long getRealCacheSize() {<a name="line.677"></a> -<span class="sourceLineNo">678</span> return this.realCacheSize.get();<a name="line.678"></a> -<span class="sourceLineNo">679</span> }<a name="line.679"></a> -<span class="sourceLineNo">680</span><a name="line.680"></a> -<span class="sourceLineNo">681</span> private long acceptableSize() {<a name="line.681"></a> -<span class="sourceLineNo">682</span> return (long) Math.floor(bucketAllocator.getTotalSize() * acceptableFactor);<a name="line.682"></a> -<span class="sourceLineNo">683</span> }<a name="line.683"></a> -<span class="sourceLineNo">684</span><a name="line.684"></a> -<span class="sourceLineNo">685</span> @VisibleForTesting<a name="line.685"></a> -<span class="sourceLineNo">686</span> long getPartitionSize(float partitionFactor) {<a name="line.686"></a> -<span class="sourceLineNo">687</span> return (long) Math.floor(bucketAllocator.getTotalSize() * partitionFactor * minFactor);<a name="line.687"></a> -<span class="sourceLineNo">688</span> }<a name="line.688"></a> -<span class="sourceLineNo">689</span><a name="line.689"></a> -<span class="sourceLineNo">690</span> /**<a name="line.690"></a> -<span class="sourceLineNo">691</span> * Return the count of bucketSizeinfos still need free space<a name="line.691"></a> -<span class="sourceLineNo">692</span> */<a name="line.692"></a> -<span class="sourceLineNo">693</span> private int bucketSizesAboveThresholdCount(float minFactor) {<a name="line.693"></a> -<span class="sourceLineNo">694</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.694"></a> -<span class="sourceLineNo">695</span> int fullCount = 0;<a name="line.695"></a> -<span class="sourceLineNo">696</span> for (int i = 0; i < stats.length; i++) {<a name="line.696"></a> -<span class="sourceLineNo">697</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.697"></a> -<span class="sourceLineNo">698</span> freeGoal = Math.max(freeGoal, 1);<a name="line.698"></a> -<span class="sourceLineNo">699</span> if (stats[i].freeCount() < freeGoal) {<a name="line.699"></a> -<span class="sourceLineNo">700</span> fullCount++;<a name="line.700"></a> -<span class="sourceLineNo">701</span> }<a name="line.701"></a> -<span class="sourceLineNo">702</span> }<a name="line.702"></a> -<span class="sourceLineNo">703</span> return fullCount;<a name="line.703"></a> -<span class="sourceLineNo">704</span> }<a name="line.704"></a> -<span class="sourceLineNo">705</span><a name="line.705"></a> -<span class="sourceLineNo">706</span> /**<a name="line.706"></a> -<span class="sourceLineNo">707</span> * This method will find the buckets that are minimally occupied<a name="line.707"></a> -<span class="sourceLineNo">708</span> * and are not reference counted and will free them completely<a name="line.708"></a> -<span class="sourceLineNo">709</span> * without any constraint on the access times of the elements,<a name="line.709"></a> -<span class="sourceLineNo">710</span> * and as a process will completely free at most the number of buckets<a name="line.710"></a> -<span class="sourceLineNo">711</span> * passed, sometimes it might not due to changing refCounts<a name="line.711"></a> -<span class="sourceLineNo">712</span> *<a name="line.712"></a> -<span class="sourceLineNo">713</span> * @param completelyFreeBucketsNeeded number of buckets to free<a name="line.713"></a> -<span class="sourceLineNo">714</span> **/<a name="line.714"></a> -<span class="sourceLineNo">715</span> private void freeEntireBuckets(int completelyFreeBucketsNeeded) {<a name="line.715"></a> -<span class="sourceLineNo">716</span> if (completelyFreeBucketsNeeded != 0) {<a name="line.716"></a> -<span class="sourceLineNo">717</span> // First we will build a set where the offsets are reference counted, usually<a name="line.717"></a> -<span class="sourceLineNo">718</span> // this set is small around O(Handler Count) unless something else is wrong<a name="line.718"></a> -<span class="sourceLineNo">719</span> Set<Integer> inUseBuckets = new HashSet<Integer>();<a name="line.719"></a> -<span class="sourceLineNo">720</span> for (BucketEntry entry : backingMap.values()) {<a name="line.720"></a> -<span class="sourceLineNo">721</span> if (entry.refCount.get() != 0) {<a name="line.721"></a> -<span class="sourceLineNo">722</span> inUseBuckets.add(bucketAllocator.getBucketIndex(entry.offset()));<a name="line.722"></a> -<span class="sourceLineNo">723</span> }<a name="line.723"></a> -<span class="sourceLineNo">724</span> }<a name="line.724"></a> -<span class="sourceLineNo">725</span><a name="line.725"></a> -<span class="sourceLineNo">726</span> Set<Integer> candidateBuckets = bucketAllocator.getLeastFilledBuckets(<a name="line.726"></a> -<span class="sourceLineNo">727</span> inUseBuckets, completelyFreeBucketsNeeded);<a name="line.727"></a> -<span class="sourceLineNo">728</span> for (Map.Entry<BlockCacheKey, BucketEntry> entry : backingMap.entrySet()) {<a name="line.728"></a> -<span class="sourceLineNo">729</span> if (candidateBuckets.contains(bucketAllocator<a name="line.729"></a> -<span class="sourceLineNo">730</span> .getBucketIndex(entry.getValue().offset()))) {<a name="line.730"></a> -<span class="sourceLineNo">731</span> evictBlock(entry.getKey(), false);<a name="line.731"></a> -<span class="sourceLineNo">732</span> }<a name="line.732"></a> -<span class="sourceLineNo">733</span> }<a name="line.733"></a> -<span class="sourceLineNo">734</span> }<a name="line.734"></a> -<span class="sourceLineNo">735</span> }<a name="line.735"></a> -<span class="sourceLineNo">736</span><a name="line.736"></a> -<span class="sourceLineNo">737</span> /**<a name="line.737"></a> -<span class="sourceLineNo">738</span> * Free the space if the used size reaches acceptableSize() or one size block<a name="line.738"></a> -<span class="sourceLineNo">739</span> * couldn't be allocated. When freeing the space, we use the LRU algorithm and<a name="line.739"></a> -<span class="sourceLineNo">740</span> * ensure there must be some blocks evicted<a name="line.740"></a> -<span class="sourceLineNo">741</span> * @param why Why we are being called<a name="line.741"></a> -<span class="sourceLineNo">742</span> */<a name="line.742"></a> -<span class="sourceLineNo">743</span> private void freeSpace(final String why) {<a name="line.743"></a> -<span class="sourceLineNo">744</span> // Ensure only one freeSpace progress at a time<a name="line.744"></a> -<span class="sourceLineNo">745</span> if (!freeSpaceLock.tryLock()) {<a name="line.745"></a> -<span class="sourceLineNo">746</span> return;<a name="line.746"></a> -<span class="sourceLineNo">747</span> }<a name="line.747"></a> -<span class="sourceLineNo">748</span> try {<a name="line.748"></a> -<span class="sourceLineNo">749</span> freeInProgress = true;<a name="line.749"></a> -<span class="sourceLineNo">750</span> long bytesToFreeWithoutExtra = 0;<a name="line.750"></a> -<span class="sourceLineNo">751</span> // Calculate free byte for each bucketSizeinfo<a name="line.751"></a> -<span class="sourceLineNo">752</span> StringBuffer msgBuffer = LOG.isDebugEnabled()? new StringBuffer(): null;<a name="line.752"></a> -<span class="sourceLineNo">753</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.753"></a> -<span class="sourceLineNo">754</span> long[] bytesToFreeForBucket = new long[stats.length];<a name="line.754"></a> -<span class="sourceLineNo">755</span> for (int i = 0; i < stats.length; i++) {<a name="line.755"></a> -<span class="sourceLineNo">756</span> bytesToFreeForBucket[i] = 0;<a name="line.756"></a> -<span class="sourceLineNo">757</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.757"></a> -<span class="sourceLineNo">758</span> freeGoal = Math.max(freeGoal, 1);<a name="line.758"></a> -<span class="sourceLineNo">759</span> if (stats[i].freeCount() < freeGoal) {<a name="line.759"></a> -<span class="sourceLineNo">760</span> bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.760"></a> -<span class="sourceLineNo">761</span> bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.761"></a> -<span class="sourceLineNo">762</span> if (msgBuffer != null) {<a name="line.762"></a> -<span class="sourceLineNo">763</span> msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.763"></a> -<span class="sourceLineNo">764</span> + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.764"></a> -<span class="sourceLineNo">765</span> }<a name="line.765"></a> -<span class="sourceLineNo">766</span> }<a name="line.766"></a> -<span class="sourceLineNo">767</span> }<a name="line.767"></a> -<span class="sourceLineNo">768</span> if (msgBuffer != null) {<a name="line.768"></a> -<span class="sourceLineNo">769</span> msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.769"></a> -<span class="sourceLineNo">770</span> }<a name="line.770"></a> -<span class="sourceLineNo">771</span><a name="line.771"></a> -<span class="sourceLineNo">772</span> if (bytesToFreeWithoutExtra <= 0) {<a name="line.772"></a> -<span class="sourceLineNo">773</span> return;<a name="line.773"></a> -<span class="sourceLineNo">774</span> }<a name="line.774"></a> -<span class="sourceLineNo">775</span> long currentSize = bucketAllocator.getUsedSize();<a name="line.775"></a> -<span class="sourceLineNo">776</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.776"></a> -<span class="sourceLineNo">777</span> if (LOG.isDebugEnabled() && msgBuffer != null) {<a name="line.777"></a> -<span class="sourceLineNo">778</span> LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.778"></a> -<span class="sourceLineNo">779</span> " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.779"></a> -<span class="sourceLineNo">780</span> StringUtils.byteDesc(realCacheSize.get()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.780"></a> -<span class="sourceLineNo">781</span> }<a name="line.781"></a> -<span class="sourceLineNo">782</span><a name="line.782"></a> -<span class="sourceLineNo">783</span> long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.783"></a> -<span class="sourceLineNo">784</span> * (1 + extraFreeFactor));<a name="line.784"></a> -<span class="sourceLineNo">785</span><a name="line.785"></a> -<span class="sourceLineNo">786</span> // Instantiate priority buckets<a name="line.786"></a> -<span class="sourceLineNo">787</span> BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.787"></a> -<span class="sourceLineNo">788</span> blockSize, getPartitionSize(singleFactor));<a name="line.788"></a> -<span class="sourceLineNo">789</span> BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.789"></a> -<span class="sourceLineNo">790</span> blockSize, getPartitionSize(multiFactor));<a name="line.790"></a> -<span class="sourceLineNo">791</span> BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.791"></a> -<span class="sourceLineNo">792</span> blockSize, getPartitionSize(memoryFactor));<a name="line.792"></a> -<span class="sourceLineNo">793</span><a name="line.793"></a> -<span class="sourceLineNo">794</span> // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.794"></a> -<span class="sourceLineNo">795</span> // group<a name="line.795"></a> -<span class="sourceLineNo">796</span> for (Map.Entry<BlockCacheKey, BucketEntry> bucketEntryWithKey : backingMap.entrySet()) {<a name="line.796"></a> -<span class="sourceLineNo">797</span> switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.797"></a> -<span class="sourceLineNo">798</span> case SINGLE: {<a name="line.798"></a> -<span class="sourceLineNo">799</span> bucketSingle.add(bucketEntryWithKey);<a name="line.799"></a> -<span class="sourceLineNo">800</span> break;<a name="line.800"></a> -<span class="sourceLineNo">801</span> }<a name="line.801"></a> -<span class="sourceLineNo">802</span> case MULTI: {<a name="line.802"></a> -<span class="sourceLineNo">803</span> bucketMulti.add(bucketEntryWithKey);<a name="line.803"></a> -<span class="sourceLineNo">804</span> break;<a name="line.804"></a> -<span class="sourceLineNo">805</span> }<a name="line.805"></a> -<span class="sourceLineNo">806</span> case MEMORY: {<a name="line.806"></a> -<span class="sourceLineNo">807</span> bucketMemory.add(bucketEntryWithKey);<a name="line.807"></a> -<span class="sourceLineNo">808</span> break;<a name="line.808"></a> -<span class="sourceLineNo">809</span> }<a name="line.809"></a> -<span class="sourceLineNo">810</span> }<a name="line.810"></a> -<span class="sourceLineNo">811</span> }<a name="line.811"></a> -<span class="sourceLineNo">812</span><a name="line.812"></a> -<span class="sourceLineNo">813</span> PriorityQueue<BucketEntryGroup> bucketQueue = new PriorityQueue<>(3);<a name="line.813"></a> -<span class="sourceLineNo">814</span><a name="line.814"></a> -<span class="sourceLineNo">815</span> bucketQueue.add(bucketSingle);<a name="line.815"></a> -<span class="sourceLineNo">816</span> bucketQueue.add(bucketMulti);<a name="line.816"></a> -<span class="sourceLineNo">817</span> bucketQueue.add(bucketMemory);<a name="line.817"></a> -<span class="sourceLineNo">818</span><a name="line.818"></a> -<span class="sourceLineNo">819</span> int remainingBuckets = 3;<a name="line.819"></a> -<span class="sourceLineNo">820</span> long bytesFreed = 0;<a name="line.820"></a> -<span class="sourceLineNo">821</span><a name="line.821"></a> -<span class="sourceLineNo">822</span> BucketEntryGroup bucketGroup;<a name="line.822"></a> -<span class="sourceLineNo">823</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.823"></a> -<span class="sourceLineNo">824</span> long overflow = bucketGroup.overflow();<a name="line.824"></a> -<span class="sourceLineNo">825</span> if (overflow > 0) {<a name="line.825"></a> -<span class="sourceLineNo">826</span> long bucketBytesToFree = Math.min(overflow,<a name="line.826"></a> -<span class="sourceLineNo">827</span> (bytesToFreeWithoutExtra - bytesFreed) / remainingBuckets);<a name="line.827"></a> -<span class="sourceLineNo">828</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.828"></a> -<span class="sourceLineNo">829</span> }<a name="line.829"></a> -<span class="sourceLineNo">830</span> remainingBuckets--;<a name="line.830"></a> -<span class="sourceLineNo">831</span> }<a name="line.831"></a> -<span class="sourceLineNo">832</span><a name="line.832"></a> -<span class="sourceLineNo">833</span> // Check and free if there are buckets that still need freeing of space<a name="line.833"></a> -<span class="sourceLineNo">834</span> if (bucketSizesAboveThresholdCount(minFactor) > 0) {<a name="line.834"></a> -<span class="sourceLineNo">835</span> bucketQueue.clear();<a name="line.835"></a> -<span class="sourceLineNo">836</span> remainingBuckets = 3;<a name="line.836"></a> -<span class="sourceLineNo">837</span><a name="line.837"></a> -<span class="sourceLineNo">838</span> bucketQueue.add(bucketSingle);<a name="line.838"></a> -<span class="sourceLineNo">839</span> bucketQueue.add(bucketMulti);<a name="line.839"></a> -<span class="sourceLineNo">840</span> bucketQueue.add(bucketMemory);<a name="line.840"></a> -<span class="sourceLineNo">841</span><a name="line.841"></a> -<span class="sourceLineNo">842</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.842"></a> -<span class="sourceLineNo">843</span> long bucketBytesToFree = (bytesToFreeWithExtra - bytesFreed) / remainingBuckets;<a name="line.843"></a> -<span class="sourceLineNo">844</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.844"></a> -<span class="sourceLineNo">845</span> remainingBuckets--;<a name="line.845"></a> -<span class="sourceLineNo">846</span> }<a name="line.846"></a> -<span class="sourceLineNo">847</span> }<a name="line.847"></a> -<span class="sourceLineNo">848</span><a name="line.848"></a> -<span class="sourceLineNo">849</span> // Even after the above free we might still need freeing because of the<a name="line.849"></a> -<span class="sourceLineNo">850</span> // De-fragmentation of the buckets (also called Slab Calcification problem), i.e<a name="line.850"></a> -<span class="sourceLineNo">851</span> // there might be some buckets where the occupancy is very sparse and thus are not<a name="line.851"></a> -<span class="sourceLineNo">852</span> // yielding the free for the other bucket sizes, the fix for this to evict some<a name="line.852"></a> -<span class="sourceLineNo">853</span> // of the buckets, we do this by evicting the buckets that are least fulled<a name="line.853"></a> -<span class="sourceLineNo">854</span> freeEntireBuckets(DEFAULT_FREE_ENTIRE_BLOCK_FACTOR *<a name="line.854"></a> -<span class="sourceLineNo">855</span> bucketSizesAboveThresholdCount(1.0f));<a name="line.855"></a> -<span class="sourceLineNo">856</span><a name="line.856"></a> -<span class="sourceLineNo">857</span> if (LOG.isDebugEnabled()) {<a name="line.857"></a> -<span class="sourceLineNo">858</span> long single = bucketSingle.totalSize();<a name="line.858"></a> -<span class="sourceLineNo">859</span> long multi = bucketMulti.totalSize();<a name="line.859"></a> -<span class="sourceLineNo">860</span> long memory = bucketMemory.totalSize();<a name="line.860"></a> -<span class="sourceLineNo">861</span> if (LOG.isDebugEnabled()) {<a name="line.861"></a> -<span class="sourceLineNo">862</span> LOG.debug("Bucket cache free space completed; " + "freed="<a name="line.862"></a> -<span class="sourceLineNo">863</span> + StringUtils.byteDesc(bytesFreed) + ", " + "total="<a name="line.863"></a> -<span class="sourceLineNo">864</span> + StringUtils.byteDesc(totalSize) + ", " + "single="<a name="line.864"></a> -<span class="sourceLineNo">865</span> + StringUtils.byteDesc(single) + ", " + "multi="<a name="line.865"></a> -<span class="sourceLineNo">866</span> + StringUtils.byteDesc(multi) + ", " + "memory="<a name="line.866"></a> -<span class="sourceLineNo">867</span> + StringUtils.byteDesc(memory));<a name="line.867"></a> -<span class="sourceLineNo">868</span> }<a name="line.868"></a> -<span class="sourceLineNo">869</span> }<a name="line.869"></a> -<span class="sourceLineNo">870</span><a name="line.870"></a> -<span class="sourceLineNo">871</span> } catch (Throwable t) {<a name="line.871"></a> -<span class="sourceLineNo">872</span> LOG.warn("Failed freeing space", t);<a name="line.872"></a> -<span class="sourceLineNo">873</span> } finally {<a name="line.873"></a> -<span class="sourceLineNo">874</span> cacheStats.evict();<a name="line.874"></a> -<span class="sourceLineNo">875</span> freeInProgress = false;<a name="line.875"></a> -<span class="sourceLineNo">876</span> freeSpaceLock.unlock();<a name="line.876"></a> -<span class="sourceLineNo">877</span> }<a name="line.877"></a> -<span class="sourceLineNo">878</span> }<a name="line.878"></a> -<span class="sourceLineNo">879</span><a name="line.879"></a> -<span class="sourceLineNo">880</span> // This handles flushing the RAM cache to IOEngine.<a name="line.880"></a> -<span class="sourceLineNo">881</span> @VisibleForTesting<a name="line.881"></a> -<span class="sourceLineNo">882</span> class WriterThread extends HasThread {<a name="line.882"></a> -<span class="sourceLineNo">883</span> private final BlockingQueue<RAMQueueEntry> inputQueue;<a name="line.883"></a> -<span class="sourceLineNo">884</span> private volatile boolean writerEnabled = true;<a name="line.884"></a> -<span class="sourceLineNo">885</span><a name="line.885"></a> -<span class="sourceLineNo">886</span> WriterThread(BlockingQueue<RAMQueueEntry> queue) {<a name="line.886"></a> -<span class="sourceLineNo">887</span> super("BucketCacheWriterThread");<a name="line.887"></a> -<span class="sourceLineNo">888</span> this.inputQueue = queue;<a name="line.888"></a> -<span class="sourceLineNo">889</span> }<a name="line.889"></a> -<span class="sourceLineNo">890</span><a name="line.890"></a> -<span class="sourceLineNo">891</span> // Used for test<a name="line.891"></a> -<span class="sourceLineNo">892</span> @VisibleForTesting<a name="line.892"></a> -<span class="sourceLineNo">893</span> void disableWriter() {<a name="line.893"></a> -<span class="sourceLineNo">894</span> this.writerEnabled = false;<a name="line.894"></a> -<span class="sourceLineNo">895</span> }<a name="line.895"></a> -<span class="sourceLineNo">896</span><a name="line.896"></a> -<span class="sourceLineNo">897</span> public void run() {<a name="line.897"></a> -<span class="sourceLineNo">898</span> List<RAMQueueEntry> entries = new ArrayList<>();<a name="line.898"></a> -<span class="sourceLineNo">899</span> try {<a name="line.899"></a> -<span class="sourceLineNo">900</span> while (cacheEnabled && writerEnabled) {<a name="line.900"></a> -<span class="sourceLineNo">901</span> try {<a name="line.901"></a> -<span class="sourceLineNo">902</span> try {<a name="line.902"></a> -<span class="sourceLineNo">903</span> // Blocks<a name="line.903"></a> -<span class="sourceLineNo">904</span> entries = getRAMQueueEntries(inputQueue, entries);<a name="line.904"></a> -<span class="sourceLineNo">905</span> } catch (InterruptedException ie) {<a name="line.905"></a> -<span class="sourceLineNo">906</span> if (!cacheEnabled) break;<a name="line.906"></a> -<span class="sourceLineNo">907</span> }<a name="line.907"></a> -<span class="sourceLineNo">908</span> doDrain(entries);<a name="line.908"></a> -<span class="sourceLineNo">909</span> } catch (Exception ioe) {<a name="line.909"></a> -<span class="sourceLineNo">910</span> LOG.error("WriterThread encountered error", ioe);<a name="line.910"></a> -<span class="sourceLineNo">911</span> }<a name="line.911"></a> -<span class="sourceLineNo">912</span> }<a name="line.912"></a> -<span class="sourceLineNo">913</span> } catch (Throwable t) {<a name="line.913"></a> -<span class="sourceLineNo">914</span> LOG.warn("Failed doing drain", t);<a name="line.914"></a> -<span class="sourceLineNo">915</span> }<a name="line.915"></a> -<span class="sourceLineNo">916</span> LOG.info(this.getName() + " exiting, cacheEnabled=" + cacheEnabled);<a name="line.916"></a> -<span class="sourceLineNo">917</span> }<a name="line.917"></a> -<span class="sourceLineNo">918</span><a name="line.918"></a> -<span class="sourceLineNo">919</span> /**<a name="line.919"></a> -<span class="sourceLineNo">920</span> * Flush the entries in ramCache to IOEngine and add bucket entry to backingMap.<a name="line.920"></a> -<span class="sourceLineNo">921</span> * Process all that are passed in even if failure being sure to remove from ramCache else we'll<a name="line.921"></a> -<span class="sourceLineNo">922</span> * never undo the references and we'll OOME.<a name="line.922"></a> -<span class="sourceLineNo">923</span> * @param entries Presumes list passed in here will be processed by this invocation only. No<a name="line.923"></a> -<span class="sourceLineNo">924</span> * interference expected.<a name="line.924"></a> -<span class="sourceLineNo">925</span> * @throws InterruptedException<a name="line.925"></a> -<span class="sourceLineNo">926</span> */<a name="line.926"></a> -<span class="sourceLineNo">927</span> @VisibleForTesting<a name="line.927"></a> -<span class="sourceLineNo">928</span> void doDrain(final List<RAMQueueEntry> entries) throws InterruptedException {<a name="line.928"></a> -<span class="sourceLineNo">929</span> if (entries.isEmpty()) {<a name="line.929"></a> -<span class="sourceLineNo">930</span> return;<a name="line.930"></a> -<span class="sourceLineNo">931</span> }<a name="line.931"></a> -<span class="sourceLineNo">932</span> // This method is a little hard to follow. We run through the passed in entries and for each<a name="line.932"></a> -<span class="sourceLineNo">933</span> // successful add, we add a non-null BucketEntry to the below bucketEntries. Later we must<a name="line.933"></a> -<span class="sourceLineNo">934</span> // do cleanup making sure we've cleared ramCache of all entries regardless of whether we<a name="line.934"></a> -<span class="sourceLineNo">935</span> // successfully added the item to the bucketcache; if we don't do the cleanup, we'll OOME by<a name="line.935"></a> -<span class="sourceLineNo">936</span> // filling ramCache. We do the clean up by again running through the passed in entries<a name="line.936"></a> -<span class="sourceLineNo">937</span> // doing extra work when we find a non-null bucketEntries corresponding entry.<a name="line.937"></a> -<span class="sourceLineNo">938</span> final int size = entries.size();<a name="line.938"></a> -<span class="sourceLineNo">939</span> BucketEntry[] bucketEntries = new BucketEntry[size];<a name="line.939"></a> -<span class="sourceLineNo">940</span> // Index updated inside loop if success or if we can't succeed. We retry if cache is full<a name="line.940"></a> -<span class="sourceLineNo">941</span> // when we go to add an entry by going around the loop again without upping the index.<a name="line.941"></a> -<span class="sourceLineNo">942</span> int index = 0;<a name="line.942"></a> -<span class="sourceLineNo">943</span> while (cacheEnabled && index < size) {<a name="line.943"></a> -<span class="sourceLineNo">944</span> RAMQueueEntry re = null;<a name="line.944"></a> -<span class="sourceLineNo">945</span> try {<a name="line.945"></a> -<span class="sourceLineNo">946</span> re = entries.get(index);<a name="line.946"></a> -<span class="sourceLineNo">947</span> if (re == null) {<a name="line.947"></a> -<span class="sourceLineNo">948</span> LOG.warn("Couldn't get entry or changed on us; who else is messing with it?");<a name="line.948"></a> -<span class="sourceLineNo">949</span> index++;<a name="line.949"></a> -<span class="sourceLineNo">950</span> continue;<a name="line.950"></a> -<span class="sourceLineNo">951</span> }<a name="line.951"></a> -<span class="sourceLineNo">952</span> BucketEntry bucketEntry =<a name="line.952"></a> -<span class="sourceLineNo">953</span> re.writeToCache(ioEngine, bucketAllocator, deserialiserMap, realCacheSize);<a name="line.953"></a> -<span class="sourceLineNo">954</span> // Successfully added. Up index and add bucketEntry. Clear io exceptions.<a name="line.954"></a> -<span class="sourceLineNo">955</span> bucketEntries[index] = bucketEntry;<a name="line.955"></a> -<span class="sourceLineNo">956</span> if (ioErrorStartTime > 0) {<a name="line.956"></a> -<span class="sourceLineNo">957</span> ioErrorStartTime = -1;<a name="line.957"></a> -<span class="sourceLineNo">958</span> }<a name="line.958"></a> -<span class="sourceLineNo">959</span> index++;<a name="line.959"></a> -<span class="sourceLineNo">960</span> } catch (BucketAllocatorException fle) {<a name="line.960"></a> -<span class="sourceLineNo">961</span> LOG.warn("Failed allocation for " + (re == null ? "" : re.getKey()) + "; " + fle);<a name="line.961"></a> -<span class="sourceLineNo">962</span> // Presume can't add. Too big? Move index on. Entry will be cleared from ramCache below.<a name="line.962"></a> -<span class="sourceLineNo">963</span> bucketEntries[index] = null;<a name="line.963"></a> -<span class="sourceLineNo">964</span> index++;<a name="line.964"></a> -<span class="sourceLineNo">965</span> } catch (CacheFullException cfe) {<a name="line.965"></a> -<span class="sourceLineNo">966</span> // Cache full when we tried to add. Try freeing space and then retrying (don't up index)<a name="line.966"></a> -<span class="sourceLineNo">967</span> if (!freeInProgress) {<a name="line.967"></a> -<span class="sourceLineNo">968</span> freeSpace("Full!");<a name="line.968"></a> -<span class="sourceLineNo">969</span> } else {<a name="line.969"></a> -<span class="sourceLineNo">970</span> Thread.sleep(50);<a name="line.970"></a> -<span class="sourceLineNo">971</span> }<a name="line.971"></a> -<span class="sourceLineNo">972</span> } catch (IOException ioex) {<a name="line.972"></a> -<span class="sourceLineNo">973</span> // Hopefully transient. Retry. checkIOErrorIsTolerated disables cache if problem.<a name="line.973"></a> -<span class="sourceLineNo">974</span> LOG.error("Failed writing to bucket cache", ioex);<a name="line.974"></a> -<span class="sourceLineNo">975</span> checkIOErrorIsTolerated();<a name="line.975"></a> -<span class="sourceLineNo">976</span> }<a name="line.976"></a> -<span class="sourceLineNo">977</span> }<a name="line.977"></a> -<span class="sourceLineNo">978</span><a name="line.978"></a> -<span class="sourceLineNo">979</span> // Make sure data pages are written on media before we update maps.<a name="line.979"></a> -<span class="sourceLineNo">980</span> try {<a name="line.980"></a> -<span class="sourceLineNo">981</span> ioEngine.sync();<a name="line.981"></a> -<span class="sourceLineNo">982</span> } catch (IOException ioex) {<a name="line.982"></a> -<span class="sourceLineNo">983</span> LOG.error("Failed syncing IO engine", ioex);<a name="line.983"></a> -<span class="sourceLineNo">984</span> checkIOErrorIsTolerated();<a name="line.984"></a> -<span class="sourceLineNo">985</span> // Since we failed sync, free the blocks in bucket allocator<a name="line.985"></a> -<span class="sourceLineNo">986</span> for (int i = 0; i < entries.size(); ++i) {<a name="line.986"></a> -<span class="sourceLineNo">987</span> if (bucketEntries[i] != null) {<a name="line.987"></a> -<span class="sourceLineNo">988</span> bucketAllocator.freeBlock(bucketEntries[i].offset());<a name="line.988"></a> -<span class="sourceLineNo">989</span> bucketEntries[i] = null;<a name="line.989"></a> -<span class="sourceLineNo">990</span> }<a name="line.990"></a> -<span class="sourceLineNo">991</span> }<a name="line.991"></a> -<span class="sourceLineNo">992</span> }<a name="line.992"></a> -<span class="sourceLineNo">993</span><a name="line.993"></a> -<span class="sourceLineNo">994</span> // Now add to backingMap if successfully added to bucket cache. Remove from ramCache if<a name="line.994"></a> -<span class="sourceLineNo">995</span> // success or error.<a name="line.995"></a> -<span class="sourceLineNo">996</span> for (int i = 0; i < size; ++i) {<a name="line.996"></a> -<span class="sourceLineNo">997</span> BlockCacheKey key = entries.get(i).getKey();<a name="line.997"></a> -<span class="sourceLineNo">998</span> // Only add if non-null entry.<a name="line.998"></a> -<span class="sourceLineNo">999</span> if (bucketEntries[i] != null) {<a name="line.999"></a> -<span class="sourceLineNo">1000</span> backingMap.put(key, bucketEntries[i]);<a name="line.1000"></a> -<span class="sourceLineNo">1001</span> }<a name="line.1001"></a> -<span class="sourceLineNo">1002</span> // Always remove from ramCache even if we failed adding it to the block cache above.<a name="line.1002"></a> -<span class="sourceLineNo">1003</span> RAMQueueEntry ramCacheEntry = ramCache.remove(key);<a name="line.1003"></a> -<span class="sourceLineNo">1004</span> if (ramCacheEntry != null) {<a name="line.1004"></a> -<span class="sourceLineNo">1005</span> heapSize.addAndGet(-1 * entries.get(i).getData().heapSize());<a name="line.1005"></a> -<span class="sourceLineNo">1006</span> } else if (bucketEntries[i] != null){<a name="line.1006"></a> -<span class="sourceLineNo">1007</span> // Block should have already been evicted. Remove it and free space.<a name="line.1007"></a> -<span class="sourceLineNo">1008</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntries[i].offset());<a name="line.1008"></a> -<span class="sourceLineNo">1009</span> try {<a name="line.1009"></a> -<span class="sourceLineNo">1010</span> lock.writeLock().lock();<a name="line.1010"></a> -<span class="sourceLineNo">1011</span> if (backingMap.remove(key, bucketEntries[i])) {<a name="line.1011"></a> -<span class="sourceLineNo">1012</span> blockEvicted(key, bucketEntries[i], false);<a name="line.1012"></a> -<span class="sourceLineNo">1013</span> }<a name="line.1013"></a> -<span class="sourceLineNo">1014</span> } finally {<a name="line.1014"></a> -<span class="sourceLineNo">1015</span> lock.writeLock().unlock();<a name="line.1015"></a> -<span class="sourceLineNo">1016</span> }<a name="line.1016"></a> -<span class="sourceLineNo">1017</span> }<a name="line.1017"></a> -<span class="sourceLineNo">1018</span> }<a name="line.1018"></a> -<span class="sourceLineNo">1019</span><a name="line.1019"></a> -<span class="sourceLineNo">1020</span> long used = bucketAllocator.getUsedSize();<a name="line.1020"></a> -<span class="sourceLineNo">1021</span> if (used > acceptableSize()) {<a name="line.1021"></a> -<span class="sourceLineNo">1022</span> freeSpace("Used=" + used + " > acceptable=" + acceptableSize());<a name="line.1022"></a> -<span class="sourceLineNo">1023</span> }<a name="line.1023"></a> -<span class="sourceLineNo">1024</span> return;<a name="line.1024"></a> -<span class="sourceLineNo">1025</span> }<a name="line.1025"></a> -<span class="sourceLineNo">1026</span> }<a name="line.1026"></a> -<span class="sourceLineNo">1027</span><a name="line.1027"></a> -<span class="sourceLineNo">1028</span> /**<a name="line.1028"></a> -<span class="sourceLineNo">1029</span> * Blocks until elements available in {@code q} then tries to grab as many as possible<a name="line.1029"></a> -<span class="sourceLineNo">1030</span> * before returning.<a name="line.1030"></a> -<span class="sourceLineNo">1031</span> * @param receptacle Where to stash the elements taken from queue. We clear before we use it<a name="line.1031"></a> -<span class="sourceLineNo">1032</span> * just in case.<a name="line.1032"></a> -<span class="sourceLineNo">1033</span> * @param q The queue to take from.<a name="line.1033"></a> -<span class="sourceLineNo">1034</span> * @return {@code receptacle} laden with elements taken from the queue or empty if none found.<a name="line.1034"></a> -<span class="sourceLineNo">1035</span> */<a name="line.1035"></a> -<span class="sourceLineNo">1036</span> @VisibleForTesting<a name="line.1036"></a> -<span class="sourceLineNo">1037</span> static List<RAMQueueEntry> getRAMQueueEntries(final BlockingQueue<RAMQueueEntry> q,<a name="line.1037"></a> -<span class="sourceLineNo">1038</span> final List<RAMQueueEntry> receptacle)<a name="line.1038"></a> -<span class="sourceLineNo">1039</span> throws InterruptedException {<a name="line.1039"></a> -<span class="sourceLineNo">1040</span> // Clear sets all entries to null and sets size to 0. We retain allocations. Presume it<a name="line.1040"></a> -<span class="sourceLineNo">1041</span> // ok even if list grew to accommodate thousands.<a name="line.1041"></a> -<span class="sourceLineNo">1042</span> receptacle.clear();<a name="line.1042"></a> -<span class="sourceLineNo">1043</span> receptacle.add(q.take());<a name="line.1043"></a> -<span class="sourceLineNo">1044</span> q.drainTo(receptacle);<a name="line.1044"></a> -<span class="sourceLineNo">1045</span> return receptacle;<a name="line.1045"></a> -<span class="sourceLineNo">1046</span> }<a name="line.1046"></a> -<span class="sourceLineNo">1047</span><a name="line.1047"></a> -<span class="sourceLineNo">1048</span> private void persistToFile() throws IOException {<a name="line.1048"></a> -<span class="sourceLineNo">1049</span> assert !cacheEnabled;<a name="line.1049"></a> -<span class="sourceLineNo">1050</span> FileOutputStream fos = null;<a name="line.1050"></a> -<span class="sourceLineNo">1051</span> ObjectOutputStream oos = null;<a name="line.1051"></a> -<span class="sourceLineNo">1052</span> try {<a name="line.1052"></a> -<span class="sourceLineNo">1053</span> if (!ioEngine.isPersistent()) {<a name="line.1053"></a> -<span class="sourceLineNo">1054</span> throw new IOException("Attempt to persist non-persistent cache mappings!");<a name="line.1054"></a> -<span class="sourceLineNo">1055</span> }<a name="line.1055"></a> -<span class="sourceLineNo">1056</span> fos = new FileOutputStream(persistencePath, false);<a name="line.1056"></a> -<span class="sourceLineNo">1057</span> oos = new ObjectOutputStream(fos);<a name="line.1057"></a> -<span class="sourceLineNo">1058</span> oos.writeLong(cacheCapacity);<a name="line.1058"></a> -<span class="sourceLineNo">1059</span> oos.writeUTF(ioEngine.getClass().getName());<a name="line.1059"></a> -<span class="sourceLineNo">1060</span> oos.writeUTF(backingMap.getClass().getName());<a name="line.1060"></a> -<span class="sourceLineNo">1061</span> oos.writeObject(deserialiserMap);<a name="line.1061"></a> -<span class="sourceLineNo">1062</span> oos.writeObject(backingMap);<a name="line.1062"></a> -<span class="sourceLineNo">1063</span> } finally {<a name="line.1063"></a> -<span class="sourceLineNo">1064</span> if (oos != null) oos.close();<a name="line.1064"></a> -<span class="sourceLineNo">1065</span> if (fos != null) fos.close();<a name="line.1065"></a> -<span class="sourceLineNo">1066</span> }<a name="line.1066"></a> -<span class="sourceLineNo">1067</span> }<a name="line.1067"></a> -<span class="sourceLineNo">1068</span><a name="line.1068"></a> -<span class="sourceLineNo">1069</span> @SuppressWarnings("unchecked")<a name="line.1069"></a> -<span class="sourceLineNo">1070</span> private void retrieveFromFile(int[] bucketSizes) throws IOException, BucketAllocatorException,<a name="line.1070"></a> -<span class="sourceLineNo">1071</span> ClassNotFoundException {<a name="line.1071"></a> -<span class="sourceLineNo">1072</span> File persistenceFile = new File(persistencePath);<a name="line.1072"></a> -<span class="sourceLineNo">1073</span> if (!persistenceFile.exists()) {<a name="line.1073"></a> -<span class="sourceLineNo">1074</span> return;<a name="line.1074"></a> -<span class="sourceLineNo">1075</span> }<a name="line.1075"></a> -<span class="sourceLineNo">1076</span> assert !cacheEnabled;<a name="line.1076"></a> -<span class="sourceLineNo">1077</span> FileInputStream fis = null;<a name="line.1077"></a> -<span class="sourceLineNo">1078</span> ObjectInputStream ois = null;<a name="line.1078"></a> -<span class="sourceLineNo">1079</span> try {<a name="line.1079"></a> -<span class="sourceLineNo">1080</span> if (!ioEngine.isPersistent())<a name="line.1080"></a> -<span class="sourceLineNo">1081</span> throw new IOException(<a name="line.1081"></a> -<span class="sourceLineNo">1082</span> "Attempt to restore non-persistent cache mappings!");<a name="line.1082"></a> -<span class="sourceLineNo">1083</span> fis = new FileInputStream(persistencePath);<a name="line.1083"></a> -<span class="sourceLineNo">1084</span> ois = new ObjectInputStream(fis);<a name="line.1084"></a> -<span class="sourceLineNo">1085</span> long capacitySize = ois.readLong();<a name="line.1085"></a> -<span class="sourceLineNo">1086</span> if (capacitySize != cacheCapacity)<a name="line.1086"></a> -<span class="sourceLineNo">1087</span> throw new IOException("Mismatched cache capacity:"<a name="line.1087"></a> -<span class="sourceLineNo">1088</span> + StringUtils.byteDesc(capacitySize) + ", expected: "<a name="line.1088"></a> -<span class="sourceLineNo">1089</span> + StringUtils.byteDesc(cacheCapacity));<a name="line.1089"></a> -<span class="sourceLineNo">1090</span> String ioclass = ois.readUTF();<a name="line.1090"></a> -<span class="sourceLineNo">1091</span> String mapclass = ois.readUTF();<a name="line.1091"></a> -<span class="sourceLineNo">1092</span> if (!ioEngine.getClass().getName().equals(ioclass))<a name="line.1092"></a> -<span class="sourceLineNo">1093</span> throw new IOException("Class name for IO engine mismatch: " + ioclass<a name="line.1093"></a> -<span class="sourceLineNo">1094</span> + ", expected:" + ioEngine.getClass().getName());<a name="line.1094"></a> -<span class="sourceLineNo">1095</span> if (!backingMap.getClass().getName().equals(mapclass))<a name="line.1095"></a> -<span class="sourceLineNo">1096</span> throw new IOException("Class name for cache map mismatch: " + mapclass<a name="line.1096"></a> -<span class="sourceLineNo">1097</span> + ", expected:" + backingMap.getClass().getName());<a name="line.1097"></a> -<span class="sourceLineNo">1098</span> UniqueIndexMap<Integer> deserMap = (UniqueIndexMap<Integer>) ois<a name="line.1098"></a> -<span class="sourceLineNo">1099</span> .readObject();<a name="line.1099"></a> -<span class="sourceLineNo">1100</span> ConcurrentHashMap<BlockCacheKey, BucketEntry> backingMapFromFile =<a name="line.1100"></a> -<span class="sourceLineNo">1101</span> (ConcurrentHashMap<BlockCacheKey, BucketEntry>) ois.readObject();<a name="line.1101"></a> -<span class="sourceLineNo">1102</span> BucketAllocator allocator = new BucketAllocator(cacheCapacity, bucketSizes,<a name="line.1102"></a> -<span class="sourceLineNo">1103</span> backingMapFromFile, realCacheSize);<a name="line.1103"></a> -<span class="sourceLineNo">1104</span> bucketAllocator = allocator;<a name="line.1104"></a> -<span class="sourceLineNo">1105</span> deserialiserMap = deserMap;<a name="line.1105"></a> -<span class="sourceLineNo">1106</span> backingMap = backingMapFromFile;<a name="line.1106"></a> -<span class="sourceLineNo">1107</span> } finally {<a name="line.1107"></a> -<span class="sourceLineNo">1108</span> if (ois != null) ois.close();<a name="line.1108"></a> -<span class="sourceLineNo">1109</span> if (fis != null) fis.close();<a name="line.1109"></a> -<span class="sourceLineNo">1110</span> if (!persistenceFile.delete()) {<a name="line.1110"></a> -<span class="sourceLineNo">1111</span> throw new IOException("Failed deleting persistence file "<a name="line.1111"></a> -<span class="sourceLineNo">1112</span> + persistenceFile.getAbsolutePath());<a name="line.1112"></a> -<span class="sourceLineNo">1113</span> }<a name="line.1113"></a> -<span class="sourceLineNo">1114</span> }<a name="line.1114"></a> -<span class="sourceLineNo">1115</span> }<a name="line.1115"></a> -<span class="sourceLineNo">1116</span><a name="line.1116"></a> -<span class="sourceLineNo">1117</span> /**<a name="line.1117"></a> -<span class="sourceLineNo">1118</span> * Check whether we tolerate IO error this time. If the duration of IOEngine<a name="line.1118"></a> -<span class="sourceLineNo">1119</span> * throwing errors exceeds ioErrorsDurationTimeTolerated, we will disable the<a name="line.1119"></a> -<span class="sourceLineNo">1120</span> * cache<a name="line.1120"></a> -<span class="sourceLineNo">1121</span> */<a name="line.1121"></a> -<span class="sourceLineNo">1122</span> private void checkIOErrorIsTolerated() {<a name="line.1122"></a> -<span class="sourceLineNo">1123</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.1123"></a> -<span class="sourceLineNo">1124</span> if (this.ioErrorStartTime > 0) {<a name="line.1124"></a> -<span class="sourceLineNo">1125</span> if (cacheEnabled && (now - ioErrorStartTime) > this.ioErrorsTolerationDuration) {<a name="line.1125"></a> -<span class="sourceLineNo">1126</span> LOG.error("IO errors duration time has exceeded " + ioErrorsTolerationDuration +<a name="line.1126"></a> -<span class="sourceLineNo">1127</span> "ms, disabling cache, please check your IOEngine");<a name="line.1127"></a> -<span class="sourceLineNo">1128</span> disableCache();<a name="line.1128"></a> -<span class="sourceLineNo">1129</span> }<a name="line.1129"></a> -<span class="sourceLineNo">1130</span> } else {<a name="line.1130"></a> -<span class="sourceLineNo">1131</span> this.ioErrorStartTime = now;<a name="line.1131"></a> -<span class="sourceLineNo">1132</span> }<a name="line.1132"></a> -<span class="sourceLineNo">1133</span> }<a name="line.1133"></a> -<span class="sourceLineNo">1134</span><a name="line.1134"></a> -<span class="sourceLineNo">1135</span> /**<a name="line.1135"></a> -<span class="sourceLineNo">1136</span> * Used to shut down the cache -or- turn it off in the case of something broken.<a name="line.1136"></a> -<span class="sourceLineNo">1137</span> */<a name="line.1137"></a> -<span class="sourceLineNo">1138</span> private void disableCache() {<a name="line.1138"></a> -<span class="sourceLineNo">1139</span> if (!cacheEnabled) return;<a name="line.1139"></a> -<span class="sourceLineNo">1140</span> cacheEnabled = false;<a name="line.1140"></a> -<span class="sourceLineNo">1141</span> ioEngine.shutdown();<a name="line.1141"></a> -<span class="sourceLineNo">1142</span> this.scheduleThreadPool.shutdown();<a name="line.1142"></a> -<span class="sourceLineNo">1143</span> for (int i = 0; i < writerThreads.length; ++i) writerThreads[i].interrupt();<a name="line.1143"></a> -<span class="sourceLineNo">1144</span> this.ramCache.clear();<a name="line.1144"></a> -<span class="sourceLineNo">1145</span> if (!ioEngine.isPersistent() || persistencePath == null) {<a name="line.1145"></a> -<span class="sourceLineNo">1146</span> // If persistent ioengine and a path, we will serialize out the backingMap.<a name="line.1146"></a> -<span class="sourceLineNo">1147</span> this.backingMap.clear();<a name="line.1147"></a> -<span class="sourceLineNo">1148</span> }<a name="line.1148"></a> -<span class="sourceLineNo">1149</span> }<a name="line.1149"></a> -<span class="sourceLineNo">1150</span><a name="line.1150"></a> -<span class="sourceLineNo">1151</span> private void join() throws InterruptedException {<a name="line.1151"></a> -<span class="sourceLineNo">1152</span> for (int i = 0; i < writerThreads.length; ++i)<a name="line.1152"></a> -<span class="sourceLineNo">1153</span> writerThreads[i].join();<a name="line.1153"></a> -<span class="sourceLineNo">1154</span> }<a name="line.1154"></a> -<span class="sourceLineNo">1155</span><a name="line.1155"></a> -<span class="sourceLineNo">1156</span> @Override<a name="line.1156"></a> -<span class="sourceLineNo">1157</span> public void shutdown() {<a name="line.1157"></a> -<span class="sourceLineNo">1158</span> disableCache();<a name="line.1158"></a> -<span class="sourceLineNo">1159</span> LOG.info("Shutdown bucket cache: IO persistent=" + ioEngine.isPersistent()<a name="line.1159"></a> -<span class="sourceLineNo">1160</span> + "; path to write=" + persistencePath);<a name="line.1160"></a> -<span class="sourceLineNo">1161</span> if (ioEngine.isPersistent() && persistencePath != null) {<a name="line.1161"></a> -<span class="sourceLineNo">1162</span> try {<a name="line.1162"></a> -<span class="sourceLineNo">1163</span> join();<a name="line.1163"></a> -<span class="sourceLineNo">1164</span> persistToFile();<a name="line.1164"></a> -<span class="sourceLineNo">1165</span> } catch (IOException ex) {<a name="line.1165"></a> -<span class="sourceLineNo">1166</span> LOG.error("Unable to persist data on exit: " + ex.toString(), ex);<a name="line.1166"></a> -<span class="sourceLineNo">1167</span> } catch (InterruptedException e) {<a name="line.1167"></a> -<span class="sourceLineNo">1168</span> LOG.warn("Failed to persist data on exit", e);<a name="line.1168"></a> -<span class="sourceLineNo">1169</span> }<a name="line.1169"></a> -<span class="sourceLineNo">1170</span> }<a name="line.1170"></a> -<span class="sourceLineNo">1171</span> }<a name="line.1171"></a> -<span class="sourceLineNo">1172</span><a name="line.1172"></a> -<span class="sourceLineNo">1173</span> @Override<a name="line.1173"></a> -<span class="sourceLineNo">1174</span> public CacheStats getStats() {<a name="line.1174"></a> -<span class="sourceLineNo">1175</span> return cacheStats;<a name="line.1175"></a> -<span class="sourceLineNo">1176</span> }<a name="line.1176"></a> -<span class="sourceLineNo">1177</span><a name="line.1177"></a> -<span class="sourceLineNo">1178</span> public BucketAllocator getAllocator() {<a name="line.1178"></a> -<span class="sourceLineNo">1179</span> return this.bucketAllocator;<a name="line.1179"></a> -<span class="sourceLineNo">1180</span> }<a name="line.1180"></a> -<span class="sourceLineNo">1181</span><a name="line.1181"></a> -<span class="sourceLineNo">1182</span> @Override<a name="line.1182"></a> -<span class="sourceLineNo">1183</span> public long heapSize() {<a name="line.1183"></a> -<span class="sourceLineNo">1184</span> return this.heapSize.get();<a name="line.1184"></a> -<span class="sourceLineNo">1185</span> }<a name="line.1185"></a> -<span class="sourceLineNo">1186</span><a name="line.1186"></a> -<span class="sourceLineNo">1187</span> @Override<a name="line.1187"></a> -<span class="sourceLineNo">1188</span> public long size() {<a name="line.1188"></a> -<span class="sourceLineNo">1189</span> return this.realCacheSize.get();<a name="line.1189"></a> -<span class="sourceLineNo">1190</span> }<a name="line.1190"></a> -<span class="sourceLineNo">1191</span><a name="line.1191"></a> -<span class="sourceLineNo">1192</span> @Override<a name="line.1192"></a> -<span class="sourceLineNo">1193</span> public long getCurrentDataSize() {<a name="line.1193"></a> -<span class="sourceLineNo">1194</span> return size();<a name="line.1194"></a> -<span class="sourceLineNo">1195</span> }<a name="line.1195"></a> -<span class="sourceLineNo">1196</span><a name="line.1196"></a> -<span class="sourceLineNo">1197</span> @Override<a name="line.1197"></a> -<span class="sourceLineNo">1198</span> public long getFreeSize() {<a name="line.1198"></a> -<span class="sourceLineNo">1199</span> return this.bucketAllocator.getFreeSize();<a name="line.1199"></a> -<span class="sourceLineNo">1200</span> }<a name="line.1200"></a> -<span class="sourceLineNo">1201</span><a name="line.1201"></a> -<span class="sourceLineNo">1202</span> @Override<a name="line.1202"></a> -<span class="sourceLineNo">1203</span> public long getBlockCount() {<a name="line.1203"></a> -<span class="sourceLineNo">1204</span> return this.blockNumber.get();<a name="line.1204"></a> -<span class="sourceLineNo">1205</span> }<a name="line.1205"></a> -<span class="sourceLineNo">1206</span><a name="line.1206"></a> -<span class="sourceLineNo">1207</span> @Override<a name="line.1207"></a> -<span class="sourceLineNo">1208</span> public long getDataBlockCount() {<a name="line.1208"></a> -<span class="sourceLineNo">1209</span> return getBlockCount();<a name="line.1209"></a> -<span class="sourceLineNo">1210</span> }<a name="line.1210"></a> -<span class="sourceLineNo">1211</span><a name="line.1211"></a> -<span class="sourceLineNo">1212</span> @Override<a name="line.1212"></a> -<span class="sourceLineNo">1213</span> public long getCurrentSize() {<a name="line.1213"></a> -<span class="sourceLineNo">1214</span> return this.bucketAllocator.getUsedSize();<a name="line.1214"></a> -<span class="sourceLineNo">1215</span> }<a name="line.1215"></a> -<span class="sourceLineNo">1216</span><a name="line.1216"></a> -<span class="sourceLineNo">1217</span> /**<a name="line.1217"></a> -<span class="sourceLineNo">1218</span> * Evicts all blocks for a specific HFile.<a name="line.1218"></a> -<span class="sourceLineNo">1219</span> * <p><a name="line.1219"></a> -<span class="sourceLineNo">1220</span> * This is used for evict-on-close to remove all blocks of a specific HFile.<a name="line.1220"></a> -<span class="sourceLineNo">1221</span> *<a name="line.1221"></a> -<span class="sourceLineNo">1222</span> * @return the number of blocks evicted<a name="line.1222"></a> -<span class="sourceLineNo">1223</span> */<a name="line.1223"></a> -<span class="sourceLineNo">1224</span> @Override<a name="line.1224"></a> -<span class="sourceLineNo">1225</span> public int evictBlocksByHfileName(String hfileName) {<a name="line.1225"></a> -<span class="sourceLineNo">1226</span> Set<BlockCacheKey> keySet = blocksByHFile.subSet(<a name="line.1226"></a> -<span class="sourceLineNo">1227</span> new BlockCacheKey(hfileName, Long.MIN_VALUE), true,<a name="line.1227"></a> -<span class="sourceLineNo">1228</span> new BlockCacheKey(hfileName, Long.MAX_VALUE), true);<a name="line.1228"></a> -<span class="sourceLineNo">1229</span><a name="line.1229"></a> -<span class="sourceLineNo">1230</span> int numEvicted = 0;<a name="line.1230"></a> -<span class="sourceLineNo">1231</span> for (BlockCacheKey key : keySet) {<a name="line.1231"></a> -<span class="sourceLineNo">1232</span> if (evictBlock(key)) {<a name="line.1232"></a> -<span class="sourceLineNo">1233</span> ++numEvicted;<a name="line.1233"></a> -<span class="sourceLineNo">1234</span> }<a name="line.1234"></a> -<span class="sourceLineNo">1235</span> }<a name="line.1235"></a> -<span class="sourceLineNo">1236</span><a name="line.1236"></a> -<span class="sourceLineNo">1237</span> return numEvicted;<a name="line.1237"></a> -<span class="sourceLineNo">1238</span> }<a name="line.1238"></a> -<span class="sourceLineNo">1239</span><a name="line.1239"></a> -<span class="sourceLineNo">1240</span> /**<a name="line.1240"></a> -<span class="sourceLineNo">1241</span> * Item in cache. We expect this to be where most memory goes. Java uses 8<a name="line.1241"></a> -<span class="sourceLineNo">1242</span> * bytes just for object headers; after this, we want to use as little as<a name="line.1242"></a> -<span class="sourceLineNo">1243</span> * possible - so we only use 8 bytes, but in order to do so we end up messing<a name="line.1243"></a> -<span class="sourceLineNo">1244</span> * around with all this Java casting stuff. Offset stored as 5 bytes that make<a name="line.1244"></a> -<span class="sourceLineNo">1245</span> * up the long. Doubt we'll see devices this big for ages. Offsets are divided<a name="line.1245"></a> -<span class="sourceLineNo">1246</span> * by 256. So 5 bytes gives us 256TB or so.<a name="line.1246"></a> -<span class="sourceLineNo">1247</span> */<a name="line.1247"></a> -<span class="sourceLineNo">1248</span> static class BucketEntry implements Serializable {<a name="line.1248"></a> -<span class="sourceLineNo">1249</span> private static final long serialVersionUID = -6741504807982257534L;<a name="line.1249"></a> -<span class="sourceLineNo">1250</span><a name="line.1250"></a> -<span class="sourceLineNo">1251</span> // access counter comparator, descending order<a name="line.1251"></a> -<span class="sourceLineNo">1252</span> static final Comparator<BucketEntry> COMPARATOR = new Comparator<BucketCache.BucketEntry>() {<a name="line.1252"></a> -<span class="sourceLineNo">1253</span><a name="line.1253"></a> -<span class="sourceLineNo">1254</span> @Override<a name="line.1254"></a> -<span class="sourceLineNo">1255</span> public int compare(BucketEntry o1, BucketEntry o2) {<a name="line.1255"></a> -<span class="sourceLineNo">1256</sp
<TRUNCATED>
