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https://issues.apache.org/jira/browse/CASSANDRA-11432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15238146#comment-15238146
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Dikang Gu commented on CASSANDRA-11432:
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some streaming logs:
2016-04-12_22:19:52.59350 INFO 22:19:52
[STREAM-IN-/2401:db00:2130:912f:face:0:13:0]: [Stream
#aa8c5160-00fc-11e6-9ed8-8723daea4be1 ID#0] Prepare completed. Receiving 207
files(2967220 bytes), sending 57 files(444705 bytes)
2016-04-12_22:19:54.00185 INFO 22:19:54
[STREAM-IN-/2401:db00:2130:9135:face:0:23:0]: [Stream
#ac374240-00fc-11e6-a8cd-65049a873696 ID#0] Prepare completed. Receiving 2
files(35759 bytes), sending 2 files(36185 bytes)
2016-04-12_22:19:57.06246 INFO 22:19:57
[STREAM-IN-/2401:db00:2130:912f:face:0:13:0]: [Stream
#ae779550-00fc-11e6-9ed8-8723daea4be1 ID#0] Prepare completed. Receiving 69
files(1097912 bytes), sending 18 files(253570 bytes)
2016-04-12_22:19:59.58458 INFO 22:19:59
[STREAM-IN-/2401:db00:2130:9135:face:0:23:0]: [Stream
#ae988ad0-00fc-11e6-a8cd-65049a873696 ID#0] Prepare completed. Receiving 16
files(245781 bytes), sending 19 files(292037 bytes)
> Counter values become under-counted when running repair.
> --------------------------------------------------------
>
> Key: CASSANDRA-11432
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11432
> Project: Cassandra
> Issue Type: Bug
> Reporter: Dikang Gu
> Assignee: Aleksey Yeschenko
>
> We are experimenting Counters in Cassandra 2.2.5. Our setup is that we have 6
> nodes, across three different regions, and in each region, the replication
> factor is 2. Basically, each nodes holds a full copy of the data.
> We are writing to cluster with CL = 2, and reading with CL = 1.
> When are doing 30k/s counter increment/decrement per node, and at the
> meanwhile, we are double writing to our mysql tier, so that we can measure
> the accuracy of C* counter, compared to mysql.
> The experiment result was great at the beginning, the counter value in C* and
> mysql are very close. The difference is less than 0.1%.
> But when we start to run the repair on one node, the counter value in C*
> become much less than the value in mysql, the difference becomes larger than
> 1%.
> My question is that is it a known problem that the counter value will become
> under-counted if repair is running? Should we avoid running repair for
> counter tables?
> Thanks.
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