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https://issues.apache.org/jira/browse/CASSANDRA-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13219012#comment-13219012
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Pavel Yaskevich commented on CASSANDRA-3950:
--------------------------------------------
+1 with final change required: default 1000000 should be changed to 10240
(which is 10 MB value in kilobytes, it will be multiplied by 1024 in the SW
constructor which would give 10MB value in bytes = 10485760).
> support trickling fsync() on writes
> -----------------------------------
>
> Key: CASSANDRA-3950
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3950
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Peter Schuller
> Assignee: Peter Schuller
> Fix For: 1.1.0
>
> Attachments: CASSANDRA-3950-1.1-v2.txt, CASSANDRA-3950-1.1-v3.txt,
> CASSANDRA-3950-1.1.txt
>
>
> Attaching a patch to support fsync():ing every N megabytes of data written
> using sequential writers. The motivation is to avoid the kernel flushing out
> pages in bulk.
> It makes sense for both platters and SSD:s, but it's particularly good for
> SSD:s because the negative consequences of fsync():ing more often are much
> more limited than with platters, and the *need* is to some extent greater
> because of the fact that with SSD:s you're much more likely to be e.g.
> streaming data quickly or compacting quickly, since you're not having to
> throttle everything as extremely as with platters, and you easily write fast
> enough for this to be a problem if you're targetting good latency at the
> outliers.
> I'm nominating it for 1.1.0 because, if disabled, the probability of this
> being a regression seems very low.
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