Re: Disappointing performance of copy (MD raid + XFS)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 2009-12-11 at 14:26 +1100, Dave Chinner wrote:
> On Fri, Dec 11, 2009 at 02:41:32AM +0100, Asdo wrote:
> > I have checked the other problem I had which I was mentioning, that I  
<snip>
> > Also with noalign and rotorstep at 255 the stripe_cache_size stays  
> > usually in the lower half (below 16000 out of 32000) while with defaults  
> > it's stuck for most of the time at the maximum and processes are stuck  
> > sleeping in MD locks for this reason.
> 
> That really does sound like a misaligned filesystem - the stripe
> cache will grow larger the more RMW cycles that need to be
> performed...
Sorry to interrupt, I would very much like to see if my array/xfs is
properly aligned and all that stuff which has been mentioned inhere,
could any of you please post the things required to check? filesystem is
straight on md raid6, debian lenny.


> 
<snip>

--
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

[Index of Archives]     [Linux RAID Wiki]     [ATA RAID]     [Linux SCSI Target Infrastructure]     [Linux Block]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device Mapper]     [Device Mapper Cryptographics]     [Kernel]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Yosemite Forum]


  Powered by Linux