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https://issues.apache.org/jira/browse/PHOENIX-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14217087#comment-14217087
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Andrew Purtell commented on PHOENIX-1453:
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bq. The best option is that we can keep those aggregate statistics in HFile
block/file level so that we can get those stats with min cost instead of
scanning on demand because it doesn't work for table with billions/trillion
rows.
Concur. We can add this in HBase. We'd need compactor changes, storage of these
stats in a new HFile metadata block, and a new API for getting aggregates from
StoreFile and Store. Am I missing anything?
> Collect row counts per region in stats table
> --------------------------------------------
>
> Key: PHOENIX-1453
> URL: https://issues.apache.org/jira/browse/PHOENIX-1453
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: James Taylor
> Assignee: ramkrishna.s.vasudevan
>
> We currently collect guideposts per equal chunk, but we should also capture
> row counts. Should we have a parallel array with the guideposts that count
> rows per guidepost, or is it enough to have a per region count?
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