Re: Designing a cluster guide

[Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>]

Am 21.05.2012 20:13, schrieb Gregory Farnum:
> On Sat, May 19, 2012 at 1:37 AM, Stefan Priebe <s.priebe@xxxxxxxxxxxx> wrote:
>> So would you recommand a fast (more ghz) Core i3 instead of a single xeon
>> for this system? (price per ghz is better).
> 
> If that's all the MDS is doing there, probably? (It would also depend
> on cache sizes and things; I don't have a good sense for how that
> impacts the MDS' performance.)
As i'm only using KVM / rbd i don't have any MDS.

> Well, RAID1 isn't going to make it any faster than just the single
> SSD, is why I pointed that out.
>
> I wouldn't recommend using a ramdisk for the journal — that will
> guarantee local data loss in the event the server doesn't shut down
> properly, and if it happens to several servers at once you get a good
> chance of losing client writes.
Sure but it's the same WHEN NOT using a Raid 1 for the journal isn't it?

Stefan
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