Lars Hofhansl created HBASE-10247:
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Summary: Client promises about timestamps
Key: HBASE-10247
URL: https://issues.apache.org/jira/browse/HBASE-10247
Project: HBase
Issue Type: Brainstorming
Reporter: Lars Hofhansl
Priority: Minor
This is to start a discussion about timestamp promises declared per table of CF.
For example if a client promises only monotonically increasing timestamps (or
no custom set timestamps) and VERSIONS=1, we can aggressively and easily remove
old versions of the same row/fam/col from the memstore before we flush, just by
supplying a comparator that ignores the timestamp (i.e. two KV just differing
by TS would be considered equal).
That would increase the performance of counters significantly.
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