Hi,

I have connected PE310 server (1cpu,2.93GHz,8cores,4GB memory) to a MD1220 via a H800 PERC adapter (1Gb NV cache).

the connection is single node , unified(redundant mode) . OS as well as , BIOS and H700(local disk) and H800 firmware is up to date.

 

I wanted to benchmark the R/W speeds on RAID 5 and RAID10 volumes on MD1220 so I used dd command after mounting them on centos 5.5.

Here are my results :

Note : Disk Cache Policy = Enabled in all cases and other settings were default with intelligent mode enabled on RAID 5  and RAID 10.

== RAID 10 - EXT3 ==

/dev/sdb1             402G  199M  382G   1% /mnt/raid10  EXT3

Write :

[root@apple ~]# time dd if=/dev/zero of=/mnt/raid10/zerofile.tst bs=1k count=4700000
4700000+0 records in
4700000+0 records out
4812800000 bytes (4.8 GB) copied, 13.9526 seconds, 345 MB/s

real    0m13.959s
user    0m0.238s
sys    0m12.334s

Read:

[root@apple ~]# time dd of=/dev/random if=/mnt/raid10/zerofile.tst bs=1k count=4000000

4000000+0 records in
4000000+0 records out
4096000000 bytes (4.1 GB) copied, 42.5778 seconds, 96.2 MB/s

real    0m42.579s
user    0m0.066s
sys    0m20.184s

== RAID 10 - EXT4 ==

Write :
time dd if=/dev/zero of=/mnt/raid10/zerofile.tst bs=1k count=4700000
4700000+0 records in
4700000+0 records out
4812800000 bytes (4.8 GB) copied, 10.5057 seconds, 458 MB/s
real    0m10.535s
user    0m0.085s
sys    0m10.224s

Read:

time dd of=/dev/random if=/mnt/raid10/zerofile.tst bs=1k count=4000000
4000000+0 records in
4000000+0 records out
4096000000 bytes (4.1 GB) copied, 53.6638 seconds, 76.3 MB/s

real    0m53.672s
user    0m0.037s
sys    0m20.345s



== RAID 5 - EXT3 ==

/dev/sdb1             536G  198M  509G   1% /mnt/raid5 -EXT3

Write :

time dd if=/dev/zero of=/mnt/raid5/zerofile.tst bs=1k count=4700000
4700000+0 records in
4700000+0 records out
4812800000 bytes (4.8 GB) copied, 14.5641 seconds, 330 MB/s

real    0m14.592s
user    0m0.207s
sys    0m12.289s

Read:

time dd of=/dev/random if=/mnt/raid5/zerofile.tst bs=1k count=4000000
4000000+0 records in
4000000+0 records out
4096000000 bytes (4.1 GB) copied, 32.3221 seconds, 127 MB/s

real    0m32.323s
user    0m0.028s
sys    0m20.174s


== RAID 5 - EXT 4 ==

/dev/sdb1             536G  198M  509G   1% /mnt/raid5  - EXT4

Write :
time dd if=/dev/zero of=/mnt/raid5/zerofile.tst bs=1k count=4700000
4700000+0 records in
4700000+0 records out
4812800000 bytes (4.8 GB) copied, 10.0236 seconds, 480 MB/s

real    0m10.056s
user    0m0.058s
sys    0m9.804s

Read:

time dd of=/dev/random if=/mnt/raid5/zerofile.tst bs=1k count=4000000
4000000+0 records in
4000000+0 records out
4096000000 bytes (4.1 GB) copied, 31.7629 seconds, 129 MB/s

real    0m31.764s
user    0m0.061s
sys    0m20.108s

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Hope the o/p above is understandable. If there is more info required I can provide that. My question is does this performance look okay/reasonable? or speeds are very low ?

If there is any other method to do r/w benchmarking please let me know. I do see ext4 performance far better than ext3 however, I am not sure if ext4 is being used for NFS sharing , as well as main concern if any backup solution currently backup ext4 fs on client?

Thanks