You are viewing a plain text version of this content. The canonical link for it is here.

Posted to commits@cassandra.apache.org by "Sam Lightfoot (Jira)" <ji...@apache.org> on 2026/03/16 12:08:00 UTC

[jira] [Updated] (CASSANDRA-19988) Direct IO support for streaming

     [ https://issues.apache.org/jira/browse/CASSANDRA-19988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Lightfoot updated CASSANDRA-19988:
--------------------------------------
    Summary: Direct IO support for streaming  (was: use direct io when streaming through the JVM)

> Direct IO support for streaming
> -------------------------------
>
>                 Key: CASSANDRA-19988
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19988
>             Project: Apache Cassandra
>          Issue Type: Improvement
>            Reporter: Jon Haddad
>            Priority: Normal
>
> In the case of the non-ZCS streaming path, we read entire SSTables.  This causes a high rate of page cache churn and should be avoided.  Using direct IO we will avoid the churn and we should see read latency remain stable, rather than jittery as a result of decreased page cache hit rate.
> This affects both our streaming slow path and when sending entire files.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org