[PVFS2-users] syncing in PVFS2

[Dean Hildebrand]

Sounds reasonable.  Is the new 0.7.0 version a good solid bet or should I
wait for a 0.7.1.  Upgrading my pNFS code might take awhile and
hopefully I can do it as infrequently as possible.  I was hoping to wait
for 1.0.0 but I need to get some results now and comparing async PVFS2
with sync NFSv4 just isn't fair.  (and comparing async PVFS2 with async
NFSv4 isn't realistic)
 Thanks! Dean

On Mon, 11 Oct 2004 neillm at mcs.anl.gov wrote:

> On Mon, Oct 11, 2004 at 12:56:44PM -0400, Dean Hildebrand wrote:
> > Test1: iozone on ext3 file system (on server machine) -> 13MB/s writes
> > Test2: iozone on PVFS2 client                         -> 44MB/s writes
> >
> > How is it possible for PVFS2 to perform better than the file system in
> > which it resides?  It is beating the disk bandwidth.  Something is not
> > syncing properly.
>
> Ah, okay -- I recall now.  Prior to pvfs2-0.6.2, we were *not*
> explicitly syncing as advertised on data movement.  I had to add a
> setinfo option to the flow interface that allowed it to honor the
> TroveSyncData option if specified (enabled by default).  So in the
> past the TroveSyncMode was in theory for both meta and data, but it
> really only affected metadata.
>
> It might be worth your time to re-sync with the tree at some point if
> possible.  I can't keep past bugs or behaviours in mind for very long.
>
>
> Best regards,
> -Neill.
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