On Wed, 11 May 2005 at 3:06pm, Chris Croome wrote
On Wed 11-May-2005 at 08:40:33AM -0500, Bryan J. Smith wrote:
The 3Ware 9000 series adds a good amount of DRAM for more buffering operations, such as RAID-5 writes. But they are new, and the drivers are still maturing.
Yeah...
FWIW there was a thread last month on fedora-devel:
- 3w-9xxx module version in FC4 https://www.redhat.com/archives/fedora-devel-list/2005-April/thread.html#008...
I thought this comment was interesting:
We never use these systems for high usage scenarios like a database server or sometimes even a home directory server. Nearline backup and slow storage is what we consider them useful for.
https://www.redhat.com/archives/fedora-devel-list/2005-April/msg00886.html
I'm in the midst of testing a dual 9500-12 based system, and I've got all sorts of results (I posted tiobench numbers for XFS and ext3 recently). I've been playing with IOR http://www.llnl.gov/asci/purple/benchmarks/limited/ior/, ftp://ftp.llnl.gov/pub/siop/ior/ for the past couple of days. This is the output from a sample run across 10 clients (NFS over tcp, wsize=rsize=32768, centos-3 clients, centos-4 server):
Command line used: /home/jlb/src/IOR-2.8.4/src/C/IOR -F -W -R -b 40m -t 4m -s 103 -e Participating tasks: 10
Summary: api = POSIX test filename = testFile access = file-per-process clients = 10 (1 per node) repetitions = 1 xfersize = 4 MiB blocksize = 40 MiB aggregate filesize = 40.23 GiB Lustre stripe size = Use default stripe count = Use default
access bw(MiB/s) block(KiB) xfer(KiB) open(s) wr/rd(s) close(s) iter ------ --------- ---------- --------- -------- -------- -------- ---- write 25.92 40960 4096 0.067203 1589.32 78.92 0 read 208.72 40960 4096 0.093569 197.39 191.23 0
Note that the server is dual homed, with half of the clients accessing each address -- thus the read number (yes, gigabit everywhere). For that test, the server was running XFS. Doing the same test with ext3 the write number is slightly higher (~30 MiB/s) and the read number slightly lower (~190MiB/s).
Just putting it out there.