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Re: backup transaction with io-thread core dumps

From: Sergio Lopez
Subject: Re: backup transaction with io-thread core dumps
Date: Wed, 25 Mar 2020 13:39:05 +0100

On Wed, Mar 25, 2020 at 01:29:48PM +0100, Dietmar Maurer wrote:
> > As expected, if both BDS are running on the same IOThread (and thus,
> > the same AioContext), the problem is not reproducible.
> >
> > In a general sense, we could say that completion modes other than
> > "individual" are not supported for a transaction that may access
> > different AioContexts. I don't see a safe an easy way to fix this. We
> > could opt for simply detect and forbid such completion modes when the
> > BDS's are assigned to different AioContexts. Perhaps Kevin (in CC) has
> > a better idea.
> So the solution is to disable backups when using io-threads?

I meant forbidding transactions with completion-mode == grouped. It
would be still possible running transactions (and thus, backups) with
completion-mode == individual, which is the default.


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