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Message-ID: <alpine.DEB.2.00.1002270607020.17433@p34.internal.lan> Date: Sat, 27 Feb 2010 06:09:07 -0500 (EST) From: Justin Piszcz <jpiszcz@...idpixels.com> To: Eric Sandeen <sandeen@...hat.com> cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, Alan Piszcz <ap@...arrain.com> Subject: Re: EXT4 is ~2X as slow as XFS (593MB/s vs 304MB/s) for writes? On Sat, 27 Feb 2010, Justin Piszcz wrote: > > > On Sat, 27 Feb 2010, Justin Piszcz wrote: > > > > > > > On Fri, 26 Feb 2010, Eric Sandeen wrote: > > Hi, I have found the same results on 2 different systems: It seems to peak at ~350MiB/s performance on mdadm raid, whether a RAID-5 or RAID-0 (two separate machines): The only option I found that allows it to go from: 10737418240 bytes (11 GB) copied, 48.7335 s, 220 MB/s to 10737418240 bytes (11 GB) copied, 30.5425 s, 352 MB/s Is the -o nodelalloc option. How come it is not breaking the 350MiB/s barrier is the question? Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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