Now thats what I'm talking about ...
By joe
- 1 minutes read - 177 wordsNew 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…