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Posted to commits@cassandra.apache.org by "Jeff Jirsa (JIRA)" <ji...@apache.org> on 2017/08/03 01:54:00 UTC
[jira] [Commented] (CASSANDRA-13738) Load is over calculated after
each IndexSummaryRedistribution
[ https://issues.apache.org/jira/browse/CASSANDRA-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16112060#comment-16112060 ]
Jeff Jirsa commented on CASSANDRA-13738:
----------------------------------------
Are you aware yet if this is a new regression? If so, when was it introduced?
> Load is over calculated after each IndexSummaryRedistribution
> -------------------------------------------------------------
>
> Key: CASSANDRA-13738
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13738
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
> Fix For: 3.0.x, 3.11.x, 4.x
>
> Attachments: sizeIssue.png
>
>
> For example, here is one of our cluster with about 500GB per node, but {{nodetool status}} shows far more load than it actually is and keeps increasing, restarting the process will reset the load, but keeps increasing afterwards:
> {noformat}
> Status=Up/Down
> |/ State=Normal/Leaving/Joining/Moving
> -- Address Load Tokens Owns (effective) Host ID Rack
> UN IP1***** 13.52 TB 256 100.0% c4c31e0a-3f01-49f7-8a22-33043737975d rac1
> UN IP2***** 14.25 TB 256 100.0% efec4980-ec9e-4424-8a21-ce7ddaf80aa0 rac1
> UN IP3***** 13.52 TB 256 100.0% 7dbcfdfc-9c07-4b1a-a4b9-970b715ebed8 rac1
> UN IP4***** 22.13 TB 256 100.0% 8879e6c4-93e3-4cc5-b957-f999c6b9b563 rac1
> UN IP5***** 18.02 TB 256 100.0% 4a1eaf22-4a83-4736-9e1c-12f898d685fa rac1
> UN IP6***** 11.68 TB 256 100.0% d633c591-28af-42cc-bc5e-47d1c8bcf50f rac1
> {noformat}
> !sizeIssue.png|test!
> The root cause is if the SSTable index summary is redistributed (typically executes hourly), the updated SSTable size is added again.
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