Re: md RAID with enterprise-class SATA or SAS drives

[Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>]

On 5/23/2012 6:46 PM, Stan Hoeppner wrote:
> On 5/23/2012 2:49 PM, David Brown wrote:
> 
>> It looks like Shaohua Li has done some testing, found that there is a
>> slow-down even with just 2 or 4 disks, and has written patches to fix it
>> (for raid1 and raid10 so far), which is very nice.
> 
> Ahh, thanks David.  I wasn't aware of Shaohua Li's
> work on this.  Got a link to his documentation and patches, or article,
> by chance?

My Google searches only turn up Shaohua Li's TRIM patches.  I don't
believe the issue we're discussing has anything to do with TRIM, though
I can't be 100% sure as Mark didn't provide much detail of his thread
ceiling problem, and I don't have a suitable system to do proper testing.

Again it would be nice to have a link to Shaohua Li's work to which you
refer to determine if it's applicable to this issue.

-- 
Stan
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html