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Message-ID: <alpine.DEB.2.00.1002270550330.17433@p34.internal.lan> Date: Sat, 27 Feb 2010 05:51:15 -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 Fri, 26 Feb 2010, Eric Sandeen wrote: > > > Eric Sandeen wrote: > > > > Oh, you need very recent util-linux-ng as well, and use libblkid from there > > with: > > > > [e2fsprogs] # ./configure --disable-libblkid > > > > Otherwise you can just feed mkfs.ext4 stripe & stride manually. > > > > -Eric > > I also tried with the default chunk size (64KiB) incase ext4 had a problem with chunk sizes > 64KiB, the results were the same for ext4, I also tried ext2 & ext3 as well just to see what their performance would be: p63:~# mkfs.ext2 -b 4096 -E stride=16,stripe-width=176 /dev/md0 p63:~# mount /dev/md0 /r1 p63:/r1# dd if=/dev/zero of=file bs=1M count=10240 10737418240 bytes (11 GB) copied, 19.9434 s, 538 MB/s p63:/r1# p63:~# mkfs.ext3 -b 4096 -E stride=16,stripe-width=176 /dev/md0 p63:~# mount /dev/md0 /r1 p63:/r1# dd if=/dev/zero of=file bs=1M count=10240 10737418240 bytes (11 GB) copied, 31.0195 s, 346 MB/s p63:~# mkfs.ext4 -b 4096 -E stride=16,stripe-width=176 /dev/md0 p63:~# mount /dev/md0 /r1 p63:/r1# dd if=/dev/zero of=file bs=1M count=10240 10737418240 bytes (11 GB) copied, 35.3866 s, 303 MB/s And, for comparison, XFS: p63:~# mkfs.xfs -f /dev/md0 > /dev/null 2>&1 p63:~# mount /dev/md0 /r1 p63:~# cd /r1 p63:/r1# dd if=/dev/zero of=file bs=1M count=10240 10240+0 records in 10240+0 records out 10737418240 bytes (11 GB) copied, 18.1527 s, 592 MB/s p63:/r1# -- 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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