Use variable length format to store the memstoreTS
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Key: HBASE-4474
URL: https://issues.apache.org/jira/browse/HBASE-4474
Project: HBase
Issue Type: Sub-task
Reporter: Ted Yu
Fix For: 0.92.0
HBASE-4344 introduced memstoreTS for KeyValues.
The following suggestion was from Kannan:
We should consider using variable length format to store the memstoreTS on
disk. Also, at the start of the flush, we can probably prune most of these
timestamps to 0 since only the ones that are higher than the current read point
for all active scanners need to be maintained at the fine grain level. So like
often times, for a majority of the KVs, we might be able to just write a 0. And
hence, storing in varying width format would be an even bigger win.
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