Re: [Nfs-ganesha-devel] NFSv4 open close operations are slow compared to Linux kernel NFSv4

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Rename "async" to "nodataconsistency"?

Ced

On 11 April 2016 at 18:41, J. Bruce Fields <bfields@xxxxxxxxxxxx> wrote:
> (Moving discussion to linux-nfs list, as it's no longer a Ganesha
> issue.)
>
> On Mon, Apr 11, 2016 at 08:40:50AM -0700, Frank Filz wrote:
>> Use of async on knfsd is not fair to use in performance evaluation. I have
>> long lobbied for renaming the async option to "I don't care about my data."
>
> Yes, renaming might be doable.  "I_dont_care_about_my_data" is a little
> cumbersome.  I'm not sure what's best.  Maybe "unsafe_commit"?  Though
> that might give the incorrect impression it's just about the commit
> operation.
>
> I'm not sure how to manage the transition.
>
>         - Even if they're using "async", they don't deserve to have
>           their server suddenly break on upgrade, so we need to continue
>           to respect "async" in existing /etc/exports files.
>         - Are there scripts that scan exports for "sync" or "async"
>           options anywhere, and how might they go wrong?  Maybe I'm
>           overthinking this.
>
> Maybe it'd be good enough to:
>
>         - keep kernel interfaces the same.
>         - in nfs-utils, use "unsafe_commit" in all output in place of
>           "async".  Accept "async" as a synonym, but possibly warn that
>           it's been renamed.
>
> --b.
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-- 
Cedric Blancher <cedric.blancher@xxxxxxxxx>
Institute Pasteur
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