On 04/10/2016 07:53 AM, steve landiss wrote:
> Thanks Mat!t... Where can I see an example of how Gluster is
> invalidating the upcalls?
You could refer to "src/FSAL/FSAL_GLUSTER/fsal_up.c" for upcall routines
used by Gluster.
>
> And how would I bound the time to restat to 0? Where is that set?
To disable the caching (or configure the time), use the below config
option in ganesha.conf file.
CACHEINODE { Attr_Expiration_Time = 0; }
Thanks,
Soumya
>
> Thanks
> Steve
>
>
> 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]
> <mailto:[email protected]>>
> > To: [email protected]
> <mailto:[email protected]>,
> [email protected]
> <mailto:[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.
> 315 West Huron Street, Suite 140A
> Ann Arbor, Michigan 48103
>
> http://www.redhat.com/en/technologies/storage
>
> tel. 734-707-0660
> fax. 734-769-8938
> cel. 734-216-5309
>
>
>
>
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