Updated iSCSI numbers

to disk, real disk, not nullio. Single JackRabbit over 10 GbE NIC to another single JackRabbit iSCSI unit.

buffered writes:

root@jrs8:/opt/scalable/bin# dd if=/dev/zero of=/big/local.file bs=8M count=10000
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 167.568 seconds, <strong>501 MB/s</strong>


buffered reads:

root@jrs8:/opt/scalable/bin# dd if=/big/local.file of=/dev/null bs=8M
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 322.052 seconds, <strong>260 MB/s</strong>


unbuffered writes:

root@jrs8:/opt/scalable/bin# dd if=/dev/zero of=/big/local.file bs=8M count=10000 oflag=direct
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 202.68 seconds, <strong>414 MB/s</strong>


unbuffered reads:

root@jrs8:/opt/scalable/bin# dd if=/big/local.file of=/dev/null bs=8M iflag=direct
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 146.199 seconds, <strong>574 MB/s</strong>

This is pre-tuning.

Since we have to ship them tomorrow afternoon, I won’t get much tuning time in, though it would be fun to see what we could do …

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