[jboss-jira] [JBoss JIRA] (WFLY-5822) Clustering performance regression in ejbremote-dist-sync scenario

[Richard Achmatowicz (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-5822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139834#comment-13139834 ] 

Richard Achmatowicz commented on WFLY-5822:
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The other possibility which Rado raised is that even though a session may be created on a node, the joining and leaving of nodes may change the primary, backup and non-owner status of nodes for a given session. This may result in a node which was formerly an owner of the session having to do a remote get each time it needs access to the session. 

The strong and weak affinity at the EJBClient level would be based on whether or not the node on which the session was initially created was still available to accept EJB client invocations. If the owner went down, the EJBClient would select another available node to direct invocations to, but this might not correspond to the new primary which Infinispan decided for the session.



> Clustering performance regression in ejbremote-dist-sync scenario 
> ------------------------------------------------------------------
>
>                 Key: WFLY-5822
>                 URL: https://issues.jboss.org/browse/WFLY-5822
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering, EJB
>    Affects Versions: 10.0.0.CR5
>            Reporter: Michal Vinkler
>            Assignee: Richard Achmatowicz
>
> Compared to EAP 6, all SYNC scenarios have the same/better performance except of this one, wonder why?
> Compare these results:
> stress-ejbremote-dist-sync
> 7.0.0.ER2: [throughput|http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-7x-stress-ejbremote-dist-sync/4/artifact/report/graph-throughput.png]
> 6.4.0.GA: [throughput|http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-6x-stress-ejbremote-dist-sync_noperf21/1/artifact/report/graph-throughput.png]
> ---------------------------------------
> Just for comparison: ejbremote REPL_SYNC scenario *performs well* on the other hand:
> stress-ejbremote-repl-sync
> 7.0.0.ER2: [throughput|http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-7x-stress-ejbremote-repl-sync/3/artifact/report/graph-throughput.png]
> 6.4.0.GA: [throughput|http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-6x-stress-ejbremote-repl-sync_noperf21/2/artifact/report/graph-throughput.png]



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