On 5/30/2012 6:07 AM, Stefan Ring wrote: > On Tue, May 1, 2012 at 12:46 PM, Stefan Ring <stefanrin@xxxxxxxxx> wrote: >>> Stefan, you should be able to simply clear the P410i configuration in >>> the BIOS, power down, then simply connect the 6 drive backplane cable to >>> the 410i, load the config from the disks, and go. This allows head to >>> head RAID6 comparison between the P400 and P410i. No doubt the 410i >>> will be quicker. This procedure will tell you how much quicker. >> >> Unfortunately, the server is located at a hosting facility at the >> opposite end of town, and I'd spend an entire day just traveling to >> and fro, so that's not currently an option. I might get lucky though, >> because we should soon get another server with an external P410i. > > The new storage blade has only been upgraded to the P410i controller, > and even though there is a new setting called "elevatorsort", which is > enabled, the performance is just as bad. The new one has a > flash-writeback cache and may be faster by a few percent ticks, but > that's it. It doesn't even make sense to compare the two in-depth, as > they perform almost identically. You now have persistent write cache. Did you test with XFS barriers disabled? If not you should. You'll likely see a decent, possibly outstanding, performance improvement with your huge metadata modification workload, as XFS will no longer flush the cache frequently when writing to the journal log. -- Stan _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
