Strange performance characteristics with ZFS

[Brian Donnell]

When I was experimenting with ZFS over NFS I had similar experiences.  Do me
a favor and try something that sounds a little out there.  On a shell on the
ZFS machine set up a looping script that executes an ls on the directory
you're writing the file to once every second and watch your transfer rates.
I noticed a marked improvement, but I could never determine if it was ZFS or
the client NFS implementation.

-- Brian

On 7/16/07, Steven Schlansker <stevenschlansker at berkeley.edu> wrote:
>
> Claus Guttesen wrote:
> >> I'm experiencing what (to me) seems to be strange performance with
> >> ZFS.  I have it set up as follows:
> >>
> >> [steven at universe /universe]$ sudo zpool status
> >>    pool: universe
> >> state: ONLINE
> >> I share it over NFS to a linux machine.  I'm trying to write a very
> >> large (30GB) disk image to it over nfs, and it goes in short fits and
> >> bursts.
> >>
> >> It copies a few (mega?)bytes of data (not sure how much exactly), and
> >> top shows:
> >
> > How much ram is installed?
> >
>
> 2.5GB, with an Athlon64 3200+
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