[infinispan-issues] [JBoss JIRA] (ISPN-5600) Optimize transactions on multiple caches

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-5600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13088867#comment-13088867 ] 

Radim Vansa commented on ISPN-5600:
-----------------------------------

[~dan.berindei] WDYT?

> Optimize transactions on multiple caches
> ----------------------------------------
>
>                 Key: ISPN-5600
>                 URL: https://issues.jboss.org/browse/ISPN-5600
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Transactions
>    Affects Versions: 8.0.0.Alpha2
>            Reporter: Radim Vansa
>
> NON_XA transactions that span multiple caches are registered as multiple synchronizations, and these synchronizations are often processed sequentially ^1^; therefore, we send synchronous PrepareCommand for each cache and then CommitCommand for each cache as well, delaying the commit by these round-trips.
> Since the targets for different caches may differ, we still need to send the RPCs separately, but in parallel. Therefore, there should be one uber-synchronization for all caches that use NON_XA mode (and maybe something similar with XA). I believe that using single synchronization could save some allocations, too.
> ^1^ Not sure if full-fledged JTA implementations do that; JTA spec does not say anything about the order of synchronizations and whether these should be processed in parallel.



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