Eshcar Hillel created HBASE-17434:
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Summary: New Synchronization Scheme for Compaction Pipeline
Key: HBASE-17434
URL: https://issues.apache.org/jira/browse/HBASE-17434
Project: HBase
Issue Type: Bug
Reporter: Eshcar Hillel
A new copyOnWrite synchronization scheme is introduced for the compaction
pipeline.
The new scheme is better since it removes the lock from getSegments() which is
invoked in every get and scan operation, and it reduces the number of
LinkedList objects that are created at runtime, thus can reduce GC (not by
much, but still...).
In addition, it fixes the method getTailSize() in compaction pipeline. This
method creates a MemstoreSize object which comprises the data size and the
overhead size of the segment and needs to be atomic.
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