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From "Simon Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13679) Add option to customize badness_threshold in dynamic endpoint snitch
Date Sat, 08 Jul 2017 00:03:00 GMT
Simon Zhou created CASSANDRA-13679:
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             Summary: Add option to customize badness_threshold in dynamic endpoint snitch
                 Key: CASSANDRA-13679
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13679
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Simon Zhou
            Assignee: Simon Zhou
         Attachments: Screen Shot 2017-07-07 at 5.01.48 PM.png

I'm working on tuning dynamic endpoint snitch and looks like the default value (0.1) for Config.dynamic_snitch_badness_threshold
is too sensitive and causes traffic imbalance among nodes, especially with my patch for CASSANDRA-13577.
So we should:
1. Revisit the default value.
2. Add an option to allow customize badness_threshold during bootstrap.

This ticket is to track #2. I attached a screenshot to show that, after increasing badness_threshold
from 0.1 to 1.0 by using patch from CASSANDRA-12179, the traffic imbalance is gone.




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