busbey commented on a change in pull request #623: HBASE-22749: Distributed MOB
compactions
URL: https://github.com/apache/hbase/pull/623#discussion_r327196533
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File path: hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java
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@@ -907,6 +789,143 @@ public static boolean hasMobColumns(TableDescriptor htd)
{
return false;
}
+ /**
+ * Get list of Mob column families (if any exists)
+ * @param htd table descriptor
+ * @return list of Mob column families
+ */
+ public static List<ColumnFamilyDescriptor>
getMobColumnFamilies(TableDescriptor htd){
+
+ List<ColumnFamilyDescriptor> fams = new
ArrayList<ColumnFamilyDescriptor>();
+ ColumnFamilyDescriptor[] hcds = htd.getColumnFamilies();
+ for (ColumnFamilyDescriptor hcd : hcds) {
+ if (hcd.isMobEnabled()) {
+ fams.add(hcd);
+ }
+ }
+ return fams;
+ }
+
+ /**
+ * Performs housekeeping file cleaning (called by MOB Cleaner chore)
+ * @param conf configuration
+ * @param table table name
+ * @throws IOException
+ */
+ public static void cleanupObsoleteMobFiles(Configuration conf, TableName
table)
+ throws IOException {
+
+ try (final Connection conn = ConnectionFactory.createConnection(conf);
+ final Admin admin = conn.getAdmin();) {
+ TableDescriptor htd = admin.getDescriptor(table);
+ List<ColumnFamilyDescriptor> list = getMobColumnFamilies(htd);
+ if (list.size() == 0) {
+ LOG.info("Skipping non-MOB table [" + table + "]");
+ return;
+ }
+ Path rootDir = FSUtils.getRootDir(conf);
+ Path tableDir = FSUtils.getTableDir(rootDir, table);
+ // How safe is this call?
+ List<Path> regionDirs = FSUtils.getRegionDirs(FileSystem.get(conf),
tableDir);
+
+ Set<String> allActiveMobFileName = new HashSet<String>();
+ FileSystem fs = FileSystem.get(conf);
+ for (Path regionPath: regionDirs) {
+ for (ColumnFamilyDescriptor hcd: list) {
+ String family = hcd.getNameAsString();
+ Path storePath = new Path(regionPath, family);
+ boolean succeed = false;
+ Set<String> regionMobs = new HashSet<String>();
+ while(!succeed) {
+ //TODO handle FNFE
+ RemoteIterator<LocatedFileStatus> rit =
fs.listLocatedStatus(storePath);
+ List<Path> storeFiles = new ArrayList<Path>();
+ // Load list of store files first
+ while(rit.hasNext()) {
+ Path p = rit.next().getPath();
+ if (fs.isFile(p)) {
+ storeFiles.add(p);
+ }
+ }
+ try {
+ for(Path pp: storeFiles) {
+ HStoreFile sf = new HStoreFile(fs, pp, conf,
CacheConfig.DISABLED,
+ BloomType.NONE, true);
+ sf.initReader();
+ byte[] mobRefData =
sf.getMetadataValue(HStoreFile.MOB_FILE_REFS);
+ byte[] mobCellCountData =
sf.getMetadataValue(HStoreFile.MOB_CELLS_COUNT);
+ byte[] bulkloadMarkerData =
sf.getMetadataValue(HStoreFile.BULKLOAD_TASK_KEY);
+ if (mobRefData == null && (mobCellCountData != null ||
+ bulkloadMarkerData == null)) {
+ LOG.info("Found old store file with no MOB_FILE_REFS: " + pp
Review comment:
this should be WARN, since it means we aren't removing any MOB files as
compactions continue.
should also call out in the log file that if an operator is concerned about
this they should manually compact the region.
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