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https://forge.continuent.org/jira/browse/SEQUOIA-1106?page=comments#action_14640
 ] 

Robert Hodges commented on SEQUOIA-1106:
----------------------------------------

Interesting indeed.  The obvious problem is that while each BackendTaskQueues 
implementation offers deterministic execution of SQL, there's no guarantee that 
the actual order is the same.  Once you pick an implementation you have to 
stick with it *or* discard the recovery log if you change.  This is not as bad 
as doing an init; however, it's possible to foresee some ugly corner cases if 
you can't shut down the VDB on all controllers at once.  

For now we should advise users to pick one implementation and stick with it. 

> RecoverThread should use the right backend request scheduler, as defined in 
> config file
> ---------------------------------------------------------------------------------------
>
>          Key: SEQUOIA-1106
>          URL: https://forge.continuent.org/jira/browse/SEQUOIA-1106
>      Project: Sequoia
>         Type: Bug

>   Components: Core
>     Versions: sequoia 2.10.11
>     Reporter: Stephane Giron
>     Assignee: Stephane Giron
>      Fix For: sequoia 2.10.11

>
>
> For now, whatever the configured request scheduler is, RecoverThread is using 
> BackendTaskQueues request scheduler.

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