Mukul Kumar Singh created HDFS-12099:
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Summary: Block Storage: Add flushid in place of timestamp in
DirtyLog file signatures
Key: HDFS-12099
URL: https://issues.apache.org/jira/browse/HDFS-12099
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ozone
Affects Versions: HDFS-7240
Reporter: Mukul Kumar Singh
Assignee: Mukul Kumar Singh
Fix For: HDFS-7240
If the config "dfs.cblock.block.buffer.flush.interval.seconds" is set to an
extremely low value i.e 1 sec. Then multiple dirty logs files are generated
during block buffer flush with the same timestamp signature.
This can be avoided by keeping a notion of flush id in BlockBuffer manager,
which can be incremented in BlockBufferManager#triggerBlockBufferFlush.
When block is restarted, then the current flush id can easily be reconstructed
by comparing the timestamp of all the dirty log files choosing the *max flushid
+ 1* as the next flush id.
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