On Mon, Dec 12, 2011 at 01:55:45PM +0100, Herbert Poetzl wrote:
> On Mon, Dec 12, 2011 at 12:47:55PM +0100, Eugen Leitl wrote:
>
> > I would like to put a zfs hybrid box I have for vserver
> > production, to improve IOPS of the underlying disks.
>
> so some kind of raid/pool setup with ssd/memory caches
> or something like that?
Yeah, it's an 8 GByte RAM 4x 1 TByte Solaris box
with an Intel SSD cache.
> > 1) would you use iSCSI or NFS for vserver guests, for
> > better performance and/or flexibility?
>
> iSCSI will result in 'block' transfers (similar goes for
> AOE) so that requires a filesystem on the client with all
> the filesystem overhead, but it might provide better
> performance for 'certain' workloads
Which workloads in particular? I'm worried about
workloads like IMAP with Maildir. If thens or
hundreds vserver guests are running on a single
machine there bound to be several users fighting
for spindle access at the same time.
> > 2) is just mounting /home e.g. via NFS for each
> > vserver guest a better idea?
>
> than having the entire guest on NFS?
Yes.
> also, the 'zfs hybrid box' is a different machine than
> the one running the guests?
Yes. Connected via GBit Ethernet. I can enable jumbo
frames.
> please clarify the setup, otherwise it's mostly hand
> waving and probably useless for your setup
Thanks, the questions you've asked are helping me already.
-- Eugen* Leitl leitl http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BEReceived on Mon Dec 12 13:03:24 2011