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https://issues.apache.org/jira/browse/CASSANDRA-9766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270101#comment-15270101
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Stefania commented on CASSANDRA-9766:
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Thanks for the modifications.
It LGTM now, I just have two small suggestions and some nits:
* In {{ColumnIndex}} a method to reset the properties that change would have
been enough, no need to pass in every time {{header, dataFile,
descriptor.version, observers}} and probably not even
{{getRowIndexEntrySerializer().indexInfoSerializer()}}. This way these fields
can return to be final.
* In BTW, {{columnIndexWriter}} can be created in the constructor so it too can
be final.
* Nit: {{indexSamples}} in {{ColumnIndex}} can be final.
* Nit: unused import in {{CompressedInputStream}}: {{java.util.zip.Checksum}}
* Nit: we can restore {{import java.util.\*}} in BTreeSet.java and {{import
java.util.concurrent.\*}} in BufferPool.java
CI looks good as well:
* the 3 failing dtests also fail on trunk
* the failing utests are all timeouts except for one which also fails on trunk.
The tests with timeout pass locally and there are timeouts on trunk too.
> Bootstrap outgoing streaming speeds are much slower than during repair
> ----------------------------------------------------------------------
>
> Key: CASSANDRA-9766
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9766
> Project: Cassandra
> Issue Type: Improvement
> Components: Streaming and Messaging
> Environment: Cassandra 2.1.2. more details in the pdf attached
> Reporter: Alexei K
> Assignee: T Jake Luciani
> Labels: performance
> Fix For: 3.x
>
> Attachments: problem.pdf
>
>
> I have a cluster in Amazon cloud , its described in detail in the attachment.
> What I've noticed is that we during bootstrap we never go above 12MB/sec
> transmission speeds and also those speeds flat line almost like we're hitting
> some sort of a limit ( this remains true for other tests that I've ran)
> however during the repair we see much higher,variable sending rates. I've
> provided network charts in the attachment as well . Is there an explanation
> for this? Is something wrong with my configuration, or is it a possible bug?
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