linux-kernel - Re: EXT4 RAID read performance

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Message-ID: <a769871e0909200340q7afd8951r21a3a025948a5f53@mail.gmail.com>
Date:	Sun, 20 Sep 2009 12:40:49 +0200
From:	wbrana@...il.com
To:	linux-kernel@...r.kernel.org
Subject: Re: EXT4 RAID read performance

On Sun, Sep 20, 2009 at 3:47 AM, Daniel J Blueman
<daniel.blueman@...il.com> wrote:
> On Sep 19, 7:20 pm, wbr...@...il.com wrote:
>>
>> Ext4:
>> read tree total runs 11 avg 20.47 MB/s (user 0.53s sys 0.74s)
>> read compiled tree total runs 4 avg 32.94 MB/s (user 0.61s sys 1.17s)
>>
>> Reiser3:
>> read tree total runs 11 avg 26.33 MB/s (user 0.54s sys 0.81s)
>> read compiled tree total runs 4 avg 41.82 MB/s (user 0.62s sys 1.36s)
>
> It would be interesting to also compare against BTRFS if on 2.6.30 or
> newer, if you can.
>

BTRFS 2.6.31

mkfs.btrfs -d raid10 -m raid10 /dev/sda7 /dev/sdb7 /dev/sdc7 /dev/sdd7
mount -t btrfs -o noatime /dev/sda7 /mnt/md8

intial create total runs 10 avg 158.85 MB/s (user 0.45s sys 0.93s)
create total runs 14 avg 32.67 MB/s (user 0.44s sys 0.90s)
patch total runs 15 avg 8.91 MB/s (user 0.22s sys 0.84s)
compile total runs 14 avg 61.02 MB/s (user 0.09s sys 0.50s)
clean total runs 10 avg 245.12 MB/s (user 0.02s sys 0.18s)

read tree total runs 11 avg 14.03 MB/s (user 0.48s sys 0.87s)
read compiled tree total runs 4 avg 29.14 MB/s (user 0.54s sys 1.37s)

delete tree total runs 10 avg 9.77 seconds (user 0.28s sys 1.37s)
delete compiled tree total runs 4 avg 11.91 seconds (user 0.31s sys 1.60s)
stat tree total runs 11 avg 4.36 seconds (user 0.25s sys 0.33s)
stat compiled tree total runs 7 avg 5.29 seconds (user 0.29s sys 0.37s)
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