Thanks Mat!t... Where can I see an example of how Gluster is invalidating the
upcalls?
And how would I bound the time to restat to 0? Where is that set?
ThanksSteve
On Sunday, April 10, 2016 8:08 AM, Matt Benjamin <[email protected]>
wrote:
Hi Steve,
1. The underlying problem is lack of invalidates with VFS. Strategies for
providing them have been considered, but I don't know of any actual work going
on to provide them. FSALs like Gluster and GPFS implement Ganesha's invalidate
upcalls and would avoid this. Also, you -can- bound the time to restat (even
make it 0, or no cache).
2. I'm not sure, other than disabling caching. It's not intended behavior,
obviously.
Matt
----- Original Message -----
> From: "steve landiss" <[email protected]>
> To: [email protected],
> [email protected]
> Sent: Saturday, April 9, 2016 4:52:52 AM
> Subject: [Nfs-ganesha-devel] Issue with readdir cache in VFS
>
> I am using nfs-ganesha with the VFS backend.
>
> If I create a file under the actual path that is being exported, it takes a
> few seconds (maybe 30?) to show up in the export.
>
> The bigger problem is, if the client is continually doing a readdir on that
> export, it never shows up because the case is continually being marked as
> up-to-date.
>
> The way to repro this is to simply export a directory, and have a client do a
> ls on that export in a tight loop. Any file you create in the original dir
> will never show up.
>
> How do I disable this cace?
>
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--
Matt Benjamin
Red Hat, Inc.
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