Now thats what I’m talking about …

New JackRabbit JR5 in lab (actually a pair of them) being built for a customer. Running some real simple baseline tests. Very simple stuff. RAID6. dd.

[root@jr5-1 ~]# dd if=/dev/zero of=/data/big.file ...
1250+0 records in
1250+0 records out
83886080000 bytes (84 GB) copied, 26.4774 seconds, 3.2 GB/s

and a quicky-dirty fio run …

Run status group 0 (all jobs):
  WRITE: io=128004MB, aggrb=3336.4MB/s, minb=3416.4MB/s, maxb=3416.4MB/s, mint=38367msec, maxt=38367msec

and the read version

Run status group 0 (all jobs):
   READ: io=128004MB, aggrb=3083.4MB/s, minb=3157.4MB/s, maxb=3157.4MB/s, mint=41515msec, maxt=41515msec

This is a single box, with a single file system on a RAID, with a single thread reading and writing.

Yeah baby!

[update] A few minor tweaks. Same fio runs.

Run status group 0 (all jobs):
  WRITE: io=128004MB, aggrb=3489.3MB/s, minb=3573.2MB/s, maxb=3573.2MB/s, mint=36685msec, maxt=36685msec

Run status group 0 (all jobs):
   READ: io=128004MB, aggrb=3243.8MB/s, minb=3320.1MB/s, maxb=3320.1MB/s, mint=39470msec, maxt=39470msec

[root@jr5-1 ~]# dd if=/dev/zero of=/data/big.file ...
625+0 records in
625+0 records out
83886080000 bytes (84 GB) copied, 23.4997 seconds, 3.6 GB/s

This suggests that the 1TB sprint should take less than 333 s. We will have to see…

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