Github user keith-turner commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/100#discussion_r64400847
--- Diff: core/src/main/java/org/apache/accumulo/core/file/rfile/RFile.java
---
@@ -386,13 +392,23 @@ public void flushIfNeeded() throws IOException {
private SampleLocalityGroupWriter sample;
- LocalityGroupWriter(BlockFileWriter fileWriter, long blockSize,
LocalityGroupMetadata currentLocalityGroup, SampleLocalityGroupWriter sample) {
+ private SummaryStatistics keyLenStats = new SummaryStatistics();
+ private double avergageKeySize = 0;
+
+ LocalityGroupWriter(BlockFileWriter fileWriter, long blockSize, long
maxBlockSize, LocalityGroupMetadata currentLocalityGroup,
+ SampleLocalityGroupWriter sample) {
this.fileWriter = fileWriter;
this.blockSize = blockSize;
+ this.maxBlockSize = maxBlockSize;
this.currentLocalityGroup = currentLocalityGroup;
this.sample = sample;
}
+ private boolean isGiantKey(Key k) {
+ // consider a key thats more than 3 standard deviations from
previously seen key sizes as giant
+ return k.getSize() > keyLenStats.getMean() +
keyLenStats.getStandardDeviation() * 3;
--- End diff --
TODO ensure there is a test for case when all keys are exactly the same
size. Test should assert more than one data block.
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