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https://issues.apache.org/jira/browse/CASSANDRA-5272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-5272:
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Attachment: 5272.txt
Makes sense to me. Patch attached against 1.2.
> Hinted Handoff Throttle based on cluster size
> ---------------------------------------------
>
> Key: CASSANDRA-5272
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5272
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.2.1
> Reporter: Rick Branson
> Priority: Minor
> Labels: lhf
> Fix For: 2.0
>
> Attachments: 5272.txt
>
>
> For a 12-node EC2 m1.xlarge cluster, restarting a node causes it to get
> completely overloaded with the default 2-thread, 1024KB setting in 1.2.x.
> This seemed to be a smaller problem when it was 6-nodes, but still required
> us to abort handoffs. The old defaults in 1.1.x were WAY more conservative.
> I've dropped this way down to 128KB on our production cluster which is really
> conservative, but appears to have solved it. The default seems way too high
> on any cluster that is non-trivial in size.
> After putting some thought to this, it seems that this should really be based
> on cluster size, making the throttle a "target" for how much write load a
> single node can swallow. As the cluster grows, the amount of hints that can
> be delivered by each other node in the cluster goes down, so the throttle
> should self-adjust to take that into account.
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