[Gluster-devel] du -sh takes extremly long

[Anand Avati]

By nature of how fuse/VFS works, each file involves a seperate network call,
which is a lot of penalty compared to disk based filesystems.

avati

2008/1/4, Sascha Ottolski <ottolski at web.de>:
>
> Am Freitag 04 Januar 2008 17:08:00 schrieben Sie:
> > what about the second run of du -hs via glusterfs?
>
> okay, I did several "time du -sh /mnt/gluster/somedir"
>
> second run is faster by 30 to 60 seconds. but then, it still takes about
> 30
> seconds on one client to get the result, and over 2.5 minutes on the
> other.
> the latter one is a client that is in a long running process copying many
> small files to the gluster. the first is idle.
>
> still, if i do the same directly on the servers, it takes only 0.02seconds.
>
>
> Thanks, Sascha
>
>
> >
> > avati
> >
> > 2008/1/4, Sascha Ottolski <ottolski at web.de>:
> > > Hi,
> > >
> > > I'm wondering, has this to do with the disabled stat-prefetch
> translator?
> > > I
> > > have a unify over 2 afr (2 bricks each) volume, spanning 2 servers
> that
> > > afr
> > > each other. A "du -sh somedir" takes no time on each server directly
> (one
> > > has
> > > 82 MB, the other 84 MB in somedir, coming from ~10.500 files files on
> > > each server (in a heavy neseted directory structure).
> > >
> > > If I do a "du -sh subdir" on the client, it takes like some minutes
> until
> > > the
> > > 166 MB result is ready.
> > >
> > > Test is done on latest tla checkout.
> > >
> > >
> > > Thanks, Sascha
> > >
> > >
> > > _______________________________________________
> > > Gluster-devel mailing list
> > > Gluster-devel at nongnu.org
> > > http://lists.nongnu.org/mailman/listinfo/gluster-devel
>
>
>


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