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Posted to commits@cassandra.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2026/03/07 11:13:00 UTC
[jira] [Updated] (CASSANDRA-21134) Direct IO support for compaction writes
[ https://issues.apache.org/jira/browse/CASSANDRA-21134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated CASSANDRA-21134:
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Labels: pull-request-available (was: )
> Direct IO support for compaction writes
> ---------------------------------------
>
> Key: CASSANDRA-21134
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21134
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Compaction
> Reporter: Sam Lightfoot
> Assignee: Sam Lightfoot
> Priority: Normal
> Labels: pull-request-available
> Fix For: 5.x
>
> Attachments: image-2026-02-11-17-22-58-361.png, image-2026-02-11-17-25-58-329.png, image-2026-03-06-22-05-34-147.png, image-2026-03-07-10-47-44-878.png
>
>
> Follow-up from the implementation for compaction reads (CASSANDRA-19987)
> Notable points
> * Update the start-up check that impacts DIO writes ({_}checkKernelBug1057843{_})
> * RocksDB uses 1 MB flush buffer. This should be configurable and performance tested (256KB vs 1MB)
> * Introduce compaction_write_disk_access_mode / backgroud_write_disk_access_mode
> * Support for the compressed path would be most beneficial
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