[CentOS] HA Storage Cookbook?

Gordon McLellan gordonthree at gmail.com
Fri Nov 7 18:01:20 UTC 2008


Les,

That's pretty much my problem.  I was hoping to kill two birds with
one stone here.  First order of business is to replace the single
drive with a raid array.  Second order was to replace a single iscsi
server with duo of machines.  If one machine had some sort of
non-recoverable problem, the other could pick-up the torch and carry
on, even if that means I need to "flip a switch" to make it happen.

Gordon





On Fri, Nov 7, 2008 at 11:06 AM, Les Mikesell <lesmikesell at gmail.com> wrote:

> But, I think the OP's real problem is that everything is tied to one single
> large drive (i.e. the software mirroring is mostly irrelevant as well as the
> controller type).  These would get you a queue of outstanding commands
> compared to a SATA, but if you want a big difference in throughput or less
> latency when multitasking you really have to split things over a bunch of
> drives, either with some other type of raid or explicitly mounting different
> filesystems so you can control which things compete for the disk head
> position.
>


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