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https://issues.apache.org/jira/browse/CASSANDRA-7404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Brown updated CASSANDRA-7404:
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Description: Investigate using linux's direct i/o for operations where we
read sequentially through a file (repair and bootstrap streaming, compaction
reads, and so on). Direct i/o does not go through the kernel page page, so it
should leave the hot cache pages used for live reads unaffected. (was:
Investigate using linux's direct i/o for operations where we read sequentially
through a file (repair and bootstrap streaming, compaction reads, and so on).
Direct i/o does not go through the kernel page page, so it should leave the hot
cache pages unaffected.)
> Use direct i/o for sequential operations (compaction/streaming)
> ---------------------------------------------------------------
>
> Key: CASSANDRA-7404
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7404
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jason Brown
> Assignee: Jason Brown
> Labels: performance
> Fix For: 3.0
>
>
> Investigate using linux's direct i/o for operations where we read
> sequentially through a file (repair and bootstrap streaming, compaction
> reads, and so on). Direct i/o does not go through the kernel page page, so it
> should leave the hot cache pages used for live reads unaffected.
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