Re: how can we help DSA save money
]] Steven Chamberlain
> On 2013-07-22 14:50, Tollef Fog Heen wrote:
> > There are practical problems with your suggestions, such as resizing the
> > RAID taking a very long time when we add a new disk (you're looking at
> > weeks of seriously reduced performance).
>
> That seems like a limitation of software, at one of the lower layers.
It's not, it's a limitation of resizing a raid and that requiring about
a billion seeks across the disk surface.
Also, the hardware that's going to be hosting the drives is an HP MSA,
so it's not a device where we can trivially change the software.
> I did not mention ZFS until now, because I didn't want limit anyone's
> thinking to filesystems. But I did have it in mind all along.
That does not help with resizing the RAID, given it's a hardware RAID.
But again, feel free to suggest patches, the code that's driving
snapshot is all out there, afaik.
--
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are
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