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<p>Hallo Joe,</p>
<p><br></p>
<p>Donnerstag, 28. Februar 2008, meintest Du:</p>
<p><br></p>
<p><span class=rvts6>JL> Have a few simple setups that I am trying to figure out if I have a</span></p>
<p><span class=rvts6>JL> problem, or if what I am seeing is normal.</span></p>
<p><br></p>
<p><span class=rvts6>JL> Two 10 GbE cards, connected with a CX4 cable. Server is one of our</span></p>
<p><span class=rvts6>JL> JackRabbits, with 750+ MB/s direct IO and 500-650 MB/s buffered IO </span></p>
<p><span class=rvts6>JL> (read-write), for IO about 10x system ram (~100x RAID cache).</span></p>
<p><br></p>
<p><span class=rvts6>JL> Getting ok iperf numbers, about 7 Gb/s single thread. Running NFS,</span></p>
<p><span class=rvts6>JL> and seeing ~200-300 MB/s best case between the systems. Is this what </span></p>
<p><span class=rvts6>JL> others have seen? Latest drivers from vendor, sent a note to them to </span></p>
<p><span class=rvts6>JL> see if we can figure this out. Figured I would tap into the 'wulf </span></p>
<p><span class=rvts6>JL> collective memory to learn what other people see.</span></p>
<p><br></p>
<p>The best i saw for NFS over 10 GE was about 350-400 MB/s write and about 450 MB/s read.</p>
<p>Single server to 8 simultaneous accessing clients (aggregated performance). </p>
<p><br></p>
<p>On the blockdevice i got 550 MB/s write and 1.1 GB/s read performance. </p>
<p><br></p>
<p><br></p>
<p><span class=rvts6>JL> 2.6.23.14 kernel on both sides, jumbo frames enabled. No switch, just</span></p>
<p><span class=rvts6>JL> a CX4 cable.</span></p>
<p><br></p>
<p>rsize/wsize are set to? </p>
<p><br></p>
<p>NFS3 or NFS4? </p>
<p><br></p>
<p>Cheers,</p>
<p>Jan</p>
!DSPAM:47c72f54174228298414181!
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