linux-kernel - Performance Characteristics of All Linux RAIDs (mdadm/bonnie++)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 28 May 2008 04:53:47 -0400 (EDT)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	linux-kernel@...r.kernel.org
cc:	linux-raid@...r.kernel.org, xfs@....sgi.com
Subject: Performance Characteristics of All Linux RAIDs (mdadm/bonnie++)

Hardware:

1. Utilized (6) 400 gigabyte sata hard drives.
2. Everything is on PCI-e (965 chipset & a 2port sata card)

Used the following 'optimizations' for all tests.

# Set read-ahead.
echo "Setting read-ahead to 64 MiB for /dev/md3"
blockdev --setra 65536 /dev/md3

# Set stripe-cache_size for RAID5.
echo "Setting stripe_cache_size to 16 MiB for /dev/md3"
echo 16384 > /sys/block/md3/md/stripe_cache_size

# Disable NCQ on all disks.
echo "Disabling NCQ on all disks..."
for i in $DISKS
do
   echo "Disabling NCQ on $i"
   echo 1 > /sys/block/"$i"/device/queue_depth
done

Software:

Kernel: 2.6.23.1 x86_64
Filesystem: XFS
Mount options: defaults,noatime

Results:

http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.html
http://home.comcast.net/~jpiszcz/raid/20080528/raid-levels.txt

Note: 'deg' means degraded and the number after is the number of disks 
failed, I did not test degraded raid10 because there are many ways you can 
degrade a raid10; however, the 3 types of raid10 were benchmarked 
f2,n2,o2.

Each test was run 3 times and averaged--FYI.

Justin.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/