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<p style="margin-top: 0px; margin-bottom: 0px;">Hello,</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Doing IOR on single node to lustre fs. And notice write to a big single file is slower. I would think write to many small files will be slower. Any ideas why is it? And if there is any lustre setting able to fix
it. It's lustre-2.10.4.</p>
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<p style="margin-top: 0px; margin-bottom: 0px;"># <span>mpirun -np 32 </span> <span>/temp/ior/bin/ior -a POSIX -C -v -w -k -F -i 1 -t 1m -b 8G -o /mnt/lustrefs/begdon/test2/eachfile-256G</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;"><span>...</span></p>
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<div><span>Max Write: 4495.70 MiB/sec (4714.08 MB/sec)</span></div>
<div>...</div>
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<div><span># mpirun -np 32 /temp/ior/bin/ior -a POSIX -C -v -w -k -i 1 -t 1m -b 8G -o /mnt/lustrefs/begdon/test2/bigfile-256G</span></div>
<div><span>...</span></div>
<div><span><span>Max Write: 1331.97 MiB/sec (1396.67 MB/sec)</span></span></div>
<div><span>...</span></div>
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<div><span>Thanks,</span></div>
<div><span>Kal</span></div>
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