John R Pierce wrote:
Stewart Williams wrote:
I have just purchased an HP ProLiant HP ML110 G5 server and install ed CentOS 5.2 x86_64 on it.
It has the following spec:
Intel(R) Xeon(R) CPU 3065 @ 2.33GHz 4GB ECC memory 4 x 250GB SATA hard disks running at 1.5GB/s
Onboard RAID controller is enabled but at the moment I have used mdadm to configure the array.
RAID bus controller: Intel Corporation 82801 SATA RAID Controller
that is essentially desktop grade disk IO
For a simple striped array I ran:
# mdadm --create /dev/md0 --level=0 --raid-devices=2 /dev/sdb1 /dev/sdc1 # mke2fs -j /dev/md0 # mount -t ext3 /dev/md0 /mnt
Attached are the results of 2 bonnie++ tests I made to test the performance:
# bonnie++ -s 256m -d /mnt -u 0 -r 0
and
# bonnie++ -s 1g -d /mnt -u 0 -r 0
I also tried 3 of the drives in a RAID 5 setup with gave similar results.
Is it me or are the results poor?
Is this the best I can expect from the hardware or is something wrong?
I would appreciate any advice or possible tweaks I can make to the system to make the performance better.
The block I/O is the thing that concerns me as mostly I am serving a 650MB file via samba to 5 clients and I think this is where I need the speed.
is this a sequential or random access application thats using this file? is it read only/mostly, or is it random update?
I'm not sure, how can I find this out?
its rather hard to read your bonnie output logs as they aren't very columnar. but it appears the sequetial read speed at least is really high.
i'm seeing 55MB/sec random(block) and 1.4GB/sec sequential reads on the 1GB file,
Correct.
so I dunno what your issues are... of course, a 1GB file sits entirely in the system cache assuming a reasonable amount of otherwise idle memory
I'm not sure whether the performance would suffice as I've not tried putting it in production.
I am going to benchmark the old server (currently in production) that this is replacing.
Thanks,
Stewart