BTDT :-)
980MB/sec write on a full rack of SAS drives
Am 19.05.2012 um 20:43 schrieb "Jeff Mohler" speedtoys.racing@gmail.com:
Saturating 10Gbe on a 6080..is a feat. :)
On Sat, May 19, 2012 at 2:17 PM, Steve Losen scl@virginia.edu wrote:
Hi all,
My company just bought some Intel x520 10GbE cards which I recently installed into our Oracle EBS database servers (IBM 3850 X5s running RHEL 5.8). As the "linux guy" I have been tasked with getting these servers to communicate with our NetApp 6080s via NFS over the new 10GbE links. I have got everything working however ever after tuning the RHEL kernel I am only getting 160MB/s writes using the "dd if=/dev/zero of=/mnt/testfile bs=1024 count=5242880" command. For you folks that run 10GbE to your toasters, what write speeds are you seeing from your 10GbE connected servers? Did you have to do any tuning in order to get the best results possible? If so what did you change?
Thanks!
Dan
Hi Dan,
Your test is a single process running a single thread. I suggest running 10 dd jobs in parallel, writing to different files. And as another guy suggested, also increase the block size, such as bs=20480. That ought to drive up the total network throughput!
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support
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