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https://issues.apache.org/jira/browse/CASSANDRA-5255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580652#comment-13580652
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Jonathan Ellis commented on CASSANDRA-5255:
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bq. Another possible option: Create a way to get IOStat data into the JVM and
measure the IOWait time but the problem is how do we support MS Windows? not
sure if there is a generic way to do so.
I like that idea a lot better than trying to special-case streaming and
compaction.
No idea how to get that info on Windows though. Guess we could fall back to
MBPs compaction/streaming there. (Yes, this is not perfect if you mix SSDs +
HDDs, but it's a LOT better than total MB of compaction.)
> dsnitch severity is not correctly set for compaction info
> ---------------------------------------------------------
>
> Key: CASSANDRA-5255
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5255
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.2.0 beta 1
> Reporter: Brandon Williams
> Assignee: Vijay
> Priority: Minor
> Fix For: 1.2.2
>
> Attachments: 0001-CASSANDRA-5255.patch
>
>
> We're doing two things wrong in CI. First, load can change between calls,
> which can cause a negative severity even though it meant to subtract whatever
> it added before. Second, we should report based on how much IO we're using,
> since a 1T throttled to 5MB/s is less impactful than a 100MB running at full
> speed.
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