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 <a href="leitlhttp://leitl.org">leitl</a> 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 F6BE