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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-5135) calculatePendingRanges could be asynchronous
Date Wed, 09 Jan 2013 22:16:14 GMT


Jonathan Ellis commented on CASSANDRA-5135:

(I note for the record that CASSANDRA-3881 is too complex to risk destabilizing 1.1 with,
but a band-aid like this may be reasonable.)
> calculatePendingRanges could be asynchronous
> --------------------------------------------
>                 Key: CASSANDRA-5135
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1.0
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>             Fix For: 1.1.9
>         Attachments: 5135.txt
> In the vein of CASSANDRA-3881, cPR is expensive and can end up dominating the gossip
thread, causing all sorts of havoc.  One simple way we can triage this is to simply give it
> s own executor with a queue size of 1 (since we don't actually need to recalculate for
every host we see if we suddenly see many of them) and do the calculation asynchronously,
freeing up the gossiper.

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