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https://issues.apache.org/jira/browse/CASSANDRA-14466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mulugeta Mammo updated CASSANDRA-14466:
---------------------------------------
Description:
Hi,
JDK 10 introduced a new API for Direct IO that enables applications to bypass
the file system cache and potentially improve performance. Details of this
feature can be found [here|[https://bugs.openjdk.java.net/browse/JDK-8164900]]
This patch uses the JDK 10 API to enable Direct IO for the Cassandra read path.
By default, we have disabled this feature; but it can be enabled using a new
configuration parameter, enable_direct_io_for_read_path. We have conducted a
Cassandra read-only stress test and measured a throughput gain of up to 60% on
flash drives.
The patch requires JDK 10 Cassandra Support.
Please review the patch and let us know your feedback.
Thanks,
[^direct_io.patch]
was:
Hi,
JDK 10 introduced a new API for Direct IO that enables applications to bypass
the file system cache and potentially improve performance. Details of this
feature can be found
[here|[https://bugs.openjdk.java.net/browse/JDK-8164900]|https://bugs.openjdk.java.net/browse/JDK-8164900].]
This patch uses the JDK 10 API to enable Direct IO for the Cassandra read path.
By default, we have disabled this feature; but it can be enabled using a new
configuration parameter, enable_direct_io_for_read_path. We have conducted a
Cassandra read-only stress test and measured a throughput gain of up to 60% on
flash drives.
The patch requires JDK 10 Cassandra support.
Please review the patch and let us know your feedback.
Thanks,
[^direct_io.patch]
> Enable Direct I/O
> ------------------
>
> Key: CASSANDRA-14466
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14466
> Project: Cassandra
> Issue Type: New Feature
> Components: Local Write-Read Paths
> Reporter: Mulugeta Mammo
> Priority: Major
> Attachments: direct_io.patch
>
>
> Hi,
> JDK 10 introduced a new API for Direct IO that enables applications to bypass
> the file system cache and potentially improve performance. Details of this
> feature can be found
> [here|[https://bugs.openjdk.java.net/browse/JDK-8164900]]
> This patch uses the JDK 10 API to enable Direct IO for the Cassandra read
> path. By default, we have disabled this feature; but it can be enabled using
> a new configuration parameter, enable_direct_io_for_read_path. We have
> conducted a Cassandra read-only stress test and measured a throughput gain of
> up to 60% on flash drives.
> The patch requires JDK 10 Cassandra Support.
> Please review the patch and let us know your feedback.
> Thanks,
> [^direct_io.patch]
>
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