current access to file systems

[Peng Yu]

On Sat, Jun 19, 2010 at 9:41 PM, Sandy Harris <sandyinchina at gmail.com> wrote:
> On 6/19/10, Peng Yu <pengyu.ut at gmail.com> wrote:
>
>>  I'm seeking for a solution in ubuntu to address the concurrent disk
>>  access problem that are described below. ...
>>
>>  I have one machine (8 CPUs and 40GB RAM) ...
>> I run a speed test ... (8 process running simultaneously) ...
>
>>  NOTE, in the future I may need to expand the system from just one
>>  machine to multiples machines, which all access the same storage
>>  space.
>
> I would be looking at a hardware RAID controller. They are not cheap,
> but not out of proportion relative to your CPU & RAM costs. Better
> reliability which is probably important if many things depend on the
> storage. Reduced CPU load, caching, ...

Sorry for the late reply. I just saw your email. Would you please let
me know why RAID controller might help me in this case? Does RAID
controller somehow buffer the data and write them a large chunk at
once? Do you recommend any brand? What specifications of the
controller I should look at to make sure that it matches my machine?

-- 
Regards,
Peng