Compaction parameter minCompactSize should be configurable
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Key: HBASE-3320
URL: https://issues.apache.org/jira/browse/HBASE-3320
Project: HBase
Issue Type: Improvement
Affects Versions: 0.90.0, 0.92.0
Reporter: Jonathan Gray
Assignee: Jonathan Gray
Priority: Critical
Fix For: 0.90.0, 0.92.0
In the new compaction algorithm, there is a minCompactSize parameter which is
used to include files in selection if they are under this size.
Currently this is:
{noformat}
this.minCompactSize = this.region.memstoreFlushSize * 3 / 2; // +50% pad
{noformat}
In a cluster, we had high setting of flush size but were doing frequent small
flushes because of HLog eviction. This led to pathological cases in compaction
file selection that this algorithm is trying to avoid in the first place.
Should make this configurable but the existing value should be fine for default
in most applications.
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