[
https://issues.apache.org/jira/browse/CASSANDRA-4038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13424990#comment-13424990
]
Brandon Williams commented on CASSANDRA-4038:
---------------------------------------------
That's a decent percentage increase, but still 0.001ms/request is pretty
minuscule. LGTM, +1.
> Investigate improving the dynamic snitch with reservoir sampling
> ----------------------------------------------------------------
>
> Key: CASSANDRA-4038
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4038
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Brandon Williams
> Assignee: Pavel Yaskevich
> Fix For: 1.2
>
> Attachments: CASSANDRA-4038.patch
>
>
> Dsnitch's UPDATES_PER_INTERVAL and WINDOW_SIZE are chosen somewhat
> arbitrarily. A better fit may be something similar to Metric's
> ExponentiallyDecayingSample, where more recent information is weighted
> heavier than past information, and reservoir sampling would also be an
> efficient way of keeping a statistically significant sample rather than
> refusing updates after UPDATES_PER_INTERVAL and only keeping WINDOW_SIZE
> amount.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
