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|-
|Kezhong Liang
|2009-02-10 23:30 - 2009-02-11 1315:30
|RAID - 1+0
| 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