1
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|-
|1+0
|Kezhong Liang
|-
|}
== Scheduling ==
|2009-02-09 14:30-17:10
|Raid 0
|-
|Kezhong Liang
|2009-02-10 23:30 - 2009-02-11 15:30
|RAID - 1+0
|-
|Mohak Vyas
|2009-02-11 16:00 - ??
|RAID - 4
|}
----
#!/bin/bash
sync
)
<pre>
# this suppose to call all small script one by one, and to be run with nohup.
# bug: it calls each script in background..
echo "Start Testing"
free
date
echo "==================================="
/home/bossanesta/test-10kb
free
date
/home/bossanesta/test-1mb
free
date
/home/bossanesta/test-100mb
free
date
echo "Finish Testing"
</pre>
'''[root@scotland raid0]# sh +x speedtest.sh'''
'''TEST1'''
----
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 44.8941 s, 239 MB/s
'''TEST2'''
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 41.8107 s, 257 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 45.8173 s, 234 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 45.3462 s, 237 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 45.1653 s, 238 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 46.6794 s, 230 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 44.382 s, 242 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 44.6695 s, 240 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 44.7078 s, 240 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 43.8667 s, 245 MB/s
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 46.4641 s, 231 MB/s
real 460.54
user 0.00
sys 323.48
'''Final Results'''
user 0m0.000s
sys 0m7.715s
===Kezhong Liang===
*Raid Type: RAID 1+0
*Test RAID 1+0 disk performance steps:
mdadm -C /dev/md9 -l1 -n2 /dev/sd[a,b]9
mdadm -C /dev/md10 -l1 -n2 /dev/sd]c,d]9
mdadm -C /dev/md11 -l1 -n2 /dev/sd[e,f]9
cat /proc/mdstat
mdadm -C /dev/md12 -l0 -n3 /dev/md9 /dev/md10 /dev/md11
mkfs.ext3 /dev/md12
mkdir /media/raid10
mount /dev/md12 /media/raid10
** Run the scripts, and write down the result. After finished, delete the raid10 I've created.
umount /dev/md12
mdadm --fail /dev/md12 /dev/md9
mdadm --fail /dev/md12 /dev/md10
mdadm --fail /dev/md12 /dev/md11
mdadm --fail /dev/md9 /dev/sd[a,b]9
mdadm --fail /dev/md10 /dev/sd[c,d]9
mdadm --fail /dev/md11 /dev/sd[e,f]9
mdadm -S /dev/md12
mdadm -S /dev/md9
mdadm -S /dev/md10
mdadm -S /dev/md11
*The result of using my Script
{|class="mediawiki" border="1" width="90%"
|-
!The First Time
!The Second Time
!The Third Time
|-
|Read Rate: 204 MB/sec
|Read Rate: 170 MB/sec
|Read Rate: 204 MB/sec
|-
|Write Rate: 102 MB/sec
|Write Rate: 102 MB/sec
|Write Rate: 93 MB/sec
|}
*The result of using Milton's Script
{|class="mediawiki" border="1" width="90%"
|-
!The First Time
!The Second Time
!The Third Time
|-
| 72.2998 s, 149 MB/s
| 69.5242 s, 154 MB/s
| 74.3364 s, 144 MB/s
|-
| 71.5798 s, 150 MB/s
| 68.4565 s, 157 MB/s
| 76.9103 s, 140 MB/s
|-
| 78.171 s, 137 MB/s
| 69.6763 s, 154 MB/s
| 81.2547 s, 132 MB/s
|-
| 70.153 s, 153 MB/s
| 69.0485 s, 156 MB/s
| 74.9017 s, 143 MB/s
|-
| 74.2309 s, 145 MB/s
| 69.2078 s, 155 MB/s
| 71.7726 s, 150 MB/s
|-
| 73.7941 s, 146 MB/s
| 73.1318 s, 147 MB/s
| 69.8053 s, 154 MB/s
|-
| 74.8228 s, 144 MB/s
| 69.0291 s, 156 MB/s
| 75.1002 s, 143 MB/s
|-
| 72.4651 s, 148 MB/s
| 75.5166 s, 142 MB/s
| 70.8875 s, 151 MB/s
|-
| 74.2831 s, 145 MB/s
| 74.2722 s, 145 MB/s
| 72.1222 s, 149 MB/s
|-
| 72.935 s, 147 MB/s
| 70.74 s, 152 MB/s
| 71.1439 s, 151 MB/s
|-
| real 751.44 user 0.00 sys 386.13
| real 943.22 user 0.00 sys 394.61
| real 980.07 user 0.00 sys 400.46
|}
*Conclusion
I did this lab three times. I failed in the first time, because the sdf9 couldn't be used. Then I used 4 disks to do the lab, it succeeded. After I
asked Chris, I found the problem. The sdf9 was used by another raid(md_d8, it is inactive), so I stopped it. Finally, I finished the lab. I compared
the result with Milton's and my second times. I find the disk speed of the raid 10 is slower than raid0(it should be) and the speed using 6 disks is
faster than 4 disks.
==Mohak Vyas==
* RAID type: <b>RAID-4</b>
<b># mdadm --create /dev/md8 --level=4 --raid-devices=4 /dev/sd[a,b,c,d]9</b>
<b># cat /proc/mdstat</b>
.........
.........
.........
md8 : active raid4 sdd9[4] sdc9[2] sdb9[1] sda9[0]
619353600 blocks level 4, 64k chunk, algorithm 0 [4/3] [UUU_]
[>....................] recovery = 0.7% (1505028/206451200) finish=49.9m
in speed=68410K/sec
<b># mkfs.ext3 /dev/md8</b>
<b># mount /dev/md8 /mnt1</b>
Run your performance script.
My script creates <b>2000 100KB files</b>. It took <b>1792.0 Seconds</b> to create those files.
Testing with Kezhong's script:
The write disk performance: 68 MB/sec
The read disk performance: 204 MB/sec
