I have an HP MicroServer N40L as a test machine with a mixture of disks
(2 x 3TB, 1 x 2TB and 1 x 1.5TB) so a 2 + 2 RAID1 configuration seemed
the sensible way to go from the start.
I have had absolutely no problems with disk performance running SmartOS
zones (it's an AMD CPU, so no KVM on this box); in fact for compiling
smallish programs it beats the pants off my much faster Mac minis, which
I put down to its superior disk performance.
It is however pretty slow with compression/decompression - using
uncompressed tarfiles to transfer files in and out of this system is
a *lot* faster than trying to save network bandwidth by compressing
first.
On 16 Jun 2015, at 3:18, Sebastien Perreault wrote:
Hi,
I've been using similar servers for a while for KVM linux machines,
and
the only I was able to achieve decent performance with no SLOG was
with
RAID MIRROR only configuration, so 2 disks with 2 disks, not perfect
but
good enough for my needs.
I did try the default RAID-Z, that was a no-go, but RAID MIRROR is ok
(it's still SATA disks in the end).
Seb,
On Mon, Jun 15, 2015 at 9:07 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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Les Technologies Alesium Inc
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that
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