Open Stack

Hey Joe...

dedup is off...

I used LZJB compression on my first attempts at using ZFS over NFS for
openstack, but I did experience problems. I suspect the problems were due
to delays or overhead caused by compression or compression related
processes. I did not experiment with gzip compression. I have an 8TB ZFS
share for each blade enclosure, so storage capacity is not a issue (right
now anyway). So I disabled compression on my openstack shares. It has been
working very well. I run a 10G network and I am getting better throughput
with open-solaris ZFS shares over NFS than I was with an HP EVA over fibre
channel at a fraction of the cost and maintenance time. The HP guys will
argue night and day about that, but it's hard to ignore the real world
results and the cost savings. The only other issue I had was the one I
mentioned previously regarding NFS version 4, but forcing NFS version 3
fixed that.

Regards,

Jaren



On Thu, Apr 18, 2013 at 4:27 PM, Joe Topjian <joe.topjian at cybera.ca> wrote:

> Hi Jaren,
>
> I didn't want to hijack the NFS thread, so I started a new one.
>
> Are you using deduplication and/or compression with ZFS and your
> instances? If so, what kind of results are you seeing?
>
> For those not at the summit or missed this morning's sessions,
> Cloudscaling gave a really interesting block storage session. They're using
> ZFS on Linux (previously OpenSolaris) with their own Cinder driver. They're
> able to utilize native-ZFS features like snapshotting for volume snapshots
> and then turn around and send those snapshots to Swift for archiving.
>
> They plan on releasing their driver but are not sure when. The main reason
> is due to their recent switch to Linux and want to ensure the driver is
> stable.
>
> (If anyone else was at the session and the above is not entirely correct,
> please correct me).
>
> Joe
>
> --
> Joe Topjian
> Systems Administrator
> Cybera Inc.
>
> www.cybera.ca
>
> Cybera is a not-for-profit organization that works to spur and support
> innovation, for the economic benefit of Alberta, through the use
> of cyberinfrastructure.
>
> _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20130422/72e2ec53/attachment.html>