On Tue, Mar 01, 2011 at 09:56:35AM -0800, Roy Sigurd Karlsbakk wrote:
> > a) do you need an SLOG at all? Some workloads (asynchronous ones) will
> > never benefit from an SLOG.
>
> We're planning to use this box for CIFS/NFS, so we'll need an SLOG to
> speed things up.
>
> > b) form factor. at least one manufacturer uses a PCIe card which is
> > not compliant with the PCIe form-factor and will not fit in many cases
> > -- especially typical 1U boxes.
>
> The box is 4U with some 7 8x PCIe slots, so I think it should do fine
>
> > c) driver support.
>
> That was why I asked here in the first place...
>
> > d) do they really just go straight to ram/flash, or do they have an
> > on-device SAS or SATA bus? Some PCIe devices just stick a small flash
> > device on a SAS or SATA controller. I suspect that those devices won't
> > see a lot of benefit relative to an external drive (although they
> > could theoretically drive that private SAS/SATA bus at much higher rates
> > than an external bus -- but I've not checked into it.)
> >
> > The other thing with PCIe based devices is that they consume an IO
> > slot,
> > which may be precious to you depending on your system board and other
> > I/O needs.
>
> As I mentioned above, we have sufficient slots. As for the SATA/SAS
> onboard controller, that was the reason I asked here in the first
> place.
>
> So - do anyone know a good device for this? X25-E is rather old now,
> so there should be better ones available......
I think the OCZ Vertex 2 EX (SLC) is fairly highly regarded:
http://www.ocztechnology.com/ocz-vertex-2-ex-series-sata-ii-2-5-ssd.html
Note that if you're using an LSI backplane (probably are if you're
using SuperMicro hardware), they have tended to certify only against
the X-25E. Other drives should work fine, but just an FYI.
This page (maybe a little dated, I'm not sure) has some pretty good
info:
http://www.nexenta.org/projects/site/wiki/About_suggested_NAS_SAN_Hardware
>
> Vennlige hilsener / Best regards
>
> roy
Ray
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
