On Tue Nov 10, 2009 at 07:01:02PM +0300, Majed B. wrote:

> Which disks can provide 2ms response with a read of 250 MB/s and write
> of 170 MB/s other than SSDs?!
> 
> Are you saying that it doesn't matter whether we use Linux or Windows
> with SSDs because the limitation is coming from the disk's controller
> itself?
> 
Not exactly - without TRIM support, the drive performance will degrade
over time.  Windows 7 has TRIM implemented for deletes (and formats),
which prevents this degradation.  Initial performance will be the same
on both systems though (as performance is limited by the interface -
SATA 6G is starting to appear though, which will definitely help).

Currently, AFAIK, none of the Linux filesystems support TRIM.  This is
largely due to discussions about the implementation - a TRIM call
requires a full flush of all pending writes (as it's a non-queueable
call) which results in severe performance issues if done synchronously
on deletes.

HTH,
    Robin
-- 
     ___        
    ( ' }     |       Robin Hill        <robin@robinhill.me.uk> |
   / / )      | Little Jim says ....                            |
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