[
https://issues.apache.org/jira/browse/HBASE-10418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrew Kyle Purtell resolved HBASE-10418.
-----------------------------------------
Resolution: Won't Fix
> give blocks of smaller store files priority in cache
> ----------------------------------------------------
>
> Key: HBASE-10418
> URL: https://issues.apache.org/jira/browse/HBASE-10418
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Sergey Shelukhin
> Priority: Major
>
> That's just an idea at this point, I don't have a patch nor plan to make one
> in near future.
> It's good for datasets that don't fit in memory especially; and if scans are
> involved.
> Scans (and gets in absence of bloom filters' help) have to read from all
> store files. Short range request will hit one block in every file.
> If small files are more likely to be entirely available in memory, on average
> requests will hit less blocks from FS.
> For scans that read a lot of data, it's better to read blocks in sequence
> from a big file and blocks for small files from cache, rather than a mix of
> FS and cached blocks from different files, because the (HBase) blocks of a
> big file would be sequential in one HDFS block.
--
This message was sent by Atlassian Jira
(v8.20.7#820007)
