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From "Jay Zhuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13738) Load is over calculated after each IndexSummaryRedistribution
Date Thu, 03 Aug 2017 01:24:00 GMT
Jay Zhuang created CASSANDRA-13738:
--------------------------------------

             Summary: 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:
{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|thumbnail!

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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