Stewart Williams wrote: > 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 I've ran the same bonnie++ test on my old server using a 1GB file. The machine has only 1GB ram and 2 IDE ATA100 hard disks in a RAID 1 mirror on seperate IDE channels on the motherboard. I got about 38MB/s write w/ 13% CPU and 80MB/s read w/ 97% CPU. Also if I watch `top` with only one user, and run a quick-report in quickbooks on a stock item, the iowait is about 50% and the cached ram fills to around 200-300MB. So with 5 users I expect it that to go up quite dramatically.