SSD benchmark

• 8 Intel X-25M 80GB SSD’s attached to 2 Adaptec 5805 Raid cards ( 4 cards / adapter)
• Price: Intel X-25M 80GB = $259.95 ( on 12-Jan-2010, http://www.amazon.com/Intel-X25-M-Mainstream-SSDSA2MH080G2C1-Internal/dp/B002IGT7IK/ref=sr_1_3?ie=UTF8&s=electronics&qid=1263336558&sr=8-3)

Vendor: INTEL     Model: SSDSA2M080        Rev: 2CV1
Type:   Direct-Access                      ANSI SCSI revision: 05

• Filesystem xfs mounted –nobarrier
• Block size 16KB
• OS: CentOS 5.4

• Description of setup.
  1. In first runs (software) each card connected as individual card to Adaptec, so in OS we see 8 individual cards. Card configured in software RAIDs: RAID0, RAID10, RAID5, RAID50
  2. In second round (marked as hardware) each Adaptec is configured as hardware RAID0 over 4 cards, so in OS we see 2 devices. Devices connected in software RAIDs: RAID0 and RAID10 with different OS schedules over each device.

Summary results (in MB/sec, more is better):

• rndrd - random read, rndwr - random write, rndrw - random read/write, seqrd - seq reads, seqwr - seq writes

mdadm --create /dev/md0 -v --raid-devices=8 --level=0 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi 
mkfs.xfs /dev/md0
mount /dev/md0 /bench -o nobarrier

size:
/dev/md0              596G  5.1M  596G   1% /bench

Results:

mdadm --create /dev/md0 -v --raid-devices=8 --level=10 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi
mkfs.xfs /dev/md0
mount /dev/md0 /bench -o nobarrier

size:
/dev/md0              298G  4.6M  298G   1%

Results:

mdadm --create /dev/md0 -v --raid-devices=8 --level=5 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi  
mkfs.xfs /dev/md0

/dev/md0              521G  5.5M  521G   1% 

mdadm --create /dev/md1 -v --raid-devices=4 --level=5 /dev/sdb /dev/sdc /dev/sdd /dev/sde
mdadm --create /dev/md2 -v --raid-devices=4 --level=5 /dev/sdf /dev/sdg /dev/sdh /dev/sdi
mdadm --create /dev/md0 -v --raid-devices=2 --level=0 /dev/md1 /dev/md2 

/dev/md0              447G  4.6M  447G   1% 

mdadm --create /dev/md0 -v --raid-devices=2 --level=0 /dev/sdb /dev/sdc 
mkfs.xfs -f /dev/md0

/dev/md0              596G  5.1M  596G   1%

Results CFQ

Results DEADLINE:

mdadm --create /dev/md0 -v --raid-devices=2 --level=1 /dev/sdb /dev/sdc 
/dev/md0              298G  4.6M  298G   1%

Results CFQ

Results DEADLINE

Results NOOP:

Deadline scheduler

#!/bin/sh
set -u
set -x
set -e

for size in 100G; do
   for mode in seqwr seqrd rndrd rndwr rndrw; do
   #for mode in rndwr; do
   #for blksize in 512 4096 8192 16384 32768 65536  ; do
   for blksize in 16384 ; do
      ./sysbench --test=fileio --file-num=64 --file-total-size=$size prepare
      #for threads in 1 4 8; do
      for threads in 1 4 8 16 32 64; do
         echo "====== testing $blksize in $threads threads"
         echo PARAMS $size $mode $threads $blksize > sysbench-size-$size-mode-$mode-threads-$threads-blksz-$blksize
         ./sysbench --test=fileio --file-total-size=$size --file-test-mode=$mode\
            --max-time=120 --max-requests=100000000 --num-threads=$threads --init-rng=on \
            --file-num=64 --file-extra-flags=direct --file-fsync-freq=0 --file-block-size=$blksize run \
            | tee -a sysbench-size-$size-mode-$mode-threads-$threads-blksz-$blksize 2>&1
      done
      ./sysbench --test=fileio --file-total-size=$size cleanup
   done
   done
done