chenxu created HBASE-23355:
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Summary: Add a conf key to decide which operations can trigger
prefetch
Key: HBASE-23355
URL: https://issues.apache.org/jira/browse/HBASE-23355
Project: HBase
Issue Type: Improvement
Reporter: chenxu
Assignee: chenxu
Copy the comment from anoop under
https://issues.apache.org/jira/browse/HBASE-23066?focusedCommentId=16984140&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16984140
{quote}On a side note, (Not related to this issue) when we have cache on write
ON as well as prefetch also On, do we do the caching part for the flushed files
twice? When it is written, its already been added to cache. Later as part of
HFile reader open, the prefetch threads will again do a read and add to cache!
{quote}
It's better to have a conf key to decide which operations(flush, compaction,
regionOpen, bulkload) can trigger the prefetch. In this way, if cacheonwrite is
enabled, we can exclude the flush and compaction operations when doing prefetch.
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