[infinispan-issues] [JBoss JIRA] (ISPN-1918) Benchmark UNICAST vs UNICAST2 vs NAKACK2 with JGroups 3.0.x

[Dan Berindei (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678022#comment-12678022 ] 

Dan Berindei commented on ISPN-1918:
------------------------------------

It turns out I had TRACE logging enabled and that slowed the test a lot.

These are the throughputs in the JGroups DIST mode simulation:

|| ||     ||      ||         2||     3||    4||
|jgroups-udp.xml|	1|	n|	20.94|	15.44|	14.6|
|	| |	y|	20.13|	15.4|	14.48|
|jgroups-udp-unicast2.xml|	2|	n|	25.7|	23.08|	22.39|
|	| |	y|	25.79|	23.7|	23.16|

UNICAST starts a little slower than UNICAST2 with 2 nodes, but its performance degrades much quicker as the number of nodes increases.

                
> Benchmark UNICAST vs UNICAST2 vs NAKACK2 with JGroups 3.0.x
> -----------------------------------------------------------
>
>                 Key: ISPN-1918
>                 URL: https://issues.jboss.org/browse/ISPN-1918
>             Project: Infinispan
>          Issue Type: Task
>          Components: RPC
>    Affects Versions: 5.1.2.FINAL
>            Reporter: Dan Berindei
>            Assignee: Dan Berindei
>              Labels: jgroups_tuning
>             Fix For: 5.1.3.CR1, 5.1.3.FINAL
>
>
> Recent changes seem to have brought performance a bit down, so we need to check whether this is caused by reverting to UNICAST instead of UNICAST2 (ISPN-1892).
> Performance has decreased most in the 2-node scenario, where we were actually sending multicasts instead of unicasts. So we need to check whether there is a performance difference between UNICAST2 and NAKACK2 as well.
> If we find UNICAST2 to perform better, we can proceed with ISPN-1879 on the 5.1.x branch as well as on the master branch.

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