[infinispan-issues] [JBoss JIRA] (ISPN-2750) Uneven request balancing via hotrod

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-2750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750318#comment-12750318 ] 

RH Bugzilla Integration commented on ISPN-2750:
-----------------------------------------------

Michal Linhard <mlinhard at redhat.com> made a comment on [bug 886549|https://bugzilla.redhat.com/show_bug.cgi?id=886549]

I calculated how the values of entries in caches and throughput on nodes differ from each other during the test by calculating how each one differs from average (counting only active nodes) these are maximum differences in entry counts and throughput on individual nodes:

32-28-32 test:
entries:     4.8 % (ignoring 6 extreme values)
throughput  17.6 % (ignoring 6 extreme values)

32-31-32 test:
entries:     3.6 % (ignoring one extreme value)
throughput: 18.6 % (ignoring one extreme value)

8-6-8 test:
entries:     7.9 % (ignoring 10 extreme values)
throughput: 17.1 % (ignoring 3 extreme values)

Other than this the tests are fine, no unusual client or server errors in logs.
So this depends on what we're able to tolerate.
                
> Uneven request balancing via hotrod
> -----------------------------------
>
>                 Key: ISPN-2750
>                 URL: https://issues.jboss.org/browse/ISPN-2750
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 5.2.0.CR2
>            Reporter: Michal Linhard
>            Assignee: Dan Berindei
>             Fix For: 5.2.0.Final
>
>
> The load sent to servers in the cluster isn't balanced
> tried in 32 node resilience tests:
> http://dev39.mw.lab.eng.bos.redhat.com/~mlinhard/hyperion3/run0035-resi-32-28-32-ER9/report/stats-throughput.png
> http://dev39.mw.lab.eng.bos.redhat.com/~mlinhard/hyperion3/run0036-resi-32-31-32-ER9/report/stats-throughput.png
> this differs from ISPN-2632 in that the load is unbalanced from the beginning of the test.

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