[CentOS] HA Storage Cookbook?

Les Mikesell lesmikesell at gmail.com
Fri Nov 7 16:06:59 UTC 2008


Gordon McLellan wrote:
> Ray,
> 
> I meant SAS; specifically Seagate Barracuda ES.2 drives.  Here's a
> tiny version of their huge url:
> 
> http://tiny.cc/3X9fI
> 
> No, they are not the super fast and expensive 15krpm database drives.


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.

-- 
   Les Mikesell
    lesmikesell at gmail.com



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