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https://issues.apache.org/jira/browse/HBASE-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708886#comment-13708886
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Jean-Daniel Cryans commented on HBASE-5313:
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[~he yongqiang], [~dhruba], [~mikhail]
Guys, I need your help to understand what's going on with this jira. HBASE-5521
has been committed more than a year ago and nothing moved after that. Moreover,
the code breaks encoding by making it not thread safe. See HBASE-8732.
This makes me think that the code in 5521 was not seriously tested (maybe
waiting on this jira to tie all the loose ends?) and since we are trying to
release 0.96.0 soonish, I'm currently in favor of reverting it.
> Restructure hfiles layout for better compression
> ------------------------------------------------
>
> Key: HBASE-5313
> URL: https://issues.apache.org/jira/browse/HBASE-5313
> Project: HBase
> Issue Type: Improvement
> Components: io
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> A HFile block contain a stream of key-values. Can we can organize these kvs
> on the disk in a better way so that we get much greater compression ratios?
> One option (thanks Prakash) is to store all the keys in the beginning of the
> block (let's call this the key-section) and then store all their
> corresponding values towards the end of the block. This will allow us to
> not-even decompress the values when we are scanning and skipping over rows in
> the block.
> Any other ideas?
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