I'd have to echo Sebastian mostly. Zfs is great, but the underlying
hardware is... what is. add another 1 tb drive and put that as Raid 10
(stripe the mirrors), and it'll perform pretty decently. You'd be
surprised. If you have the money, yeah, SSD is fantastic, but wow... if
you are trying to get reasonable size, you'll spend some cash. Perhaps
in this case that doesn't matter. If you have the money for SSD
drives, you might consider getting 4 reasonable 2TB drives (they sell
them for $50 each on gohardrive.com anymore for WD RE4 or Hitachi
Ultrastars now), and then putting some budget into a smartOS compatible
PCI-SSD drive. Be careful on that - it's easy to get the wrong drive,
but it's not that hard to get the right one either! That way you'd have
your 4 spindles, raid 10 with a slog, it'd be decent that way, IMHO.
On 06/15/2015 07:07 PM, [email protected] wrote:
one of my clients owns a supermicro-based box with 4 hot-swap sata bays. it has
integrated SATA and (i believe) no SAS. the original admin populated it with
(3) 1TB SATA disks and commissioned it as a fileserver (simple raid5). it has
32GB of memory. the box is no longer being used, so it's been allocated to me
for the purpose of hosting another windows server. i'd like to virtualize the
server via smartos/kvm but i have reservations.
i believe i can get away with using only 16GB for VMs, so that leaves 16GB for
smartos/zfs - i think that'll probably work well. but i seriously doubt those
disks will give anything resembling decent performance. i only have 4 bays to
work with, and only one is currently free. for a windows server VM hosting a
multi-user database, would adding a SATA SSD as log device for the zones zpool
keep me out of hot water here or is this just not going to work?
obviously i can try to source a supported SAS controller and disks, but i'm
wondering if i can actually get by with SATA ... what if i filled the (4) 3.5"
bays with SSDs and striped across two mirrors? would that mostly guarantee decent
performance, or will that just waste time and money?
experienced opinions greatfully accepted!
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