On the test track: New JackRabbit, open the throttle wide ...

I know, I know, I really should wait until the drive build is done. I know I should do that. [root@Mj?lnir ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/md0 89G 6.8G 77G 9% / tmpfs 127G 0 127G 0% /dev/shm /dev/sdc 48T 393G 47T 1% /data/3 /dev/sdb 48T 395G 47T 1% /data/2 /dev/sdd 33T 367G 33T 2% /data/4 /dev/sda 48T 374G 47T 1% /data/1 I called it Mj?lnir, as I liked this quote:

(or as I like to think of it) … of data. But I gotta know. How fast can this system run? Start up our 1TB write. This is simply streaming 1TB of data out to the drives. Thats it. Only a file system. Simple stream. Uncached. So this is really … really streaming. And its being burdened by the volume build. So we aren’t at maximum speed. Light up fio with our test, and … … start up dstat in another window, give it some time, and then …

  1   2  90   7   0   0|   0  6482M| 240B 1048B|   0     0 |  19k 6228
  1   2  90   7   0   0|   0  5908M|   0     0 |   0     0 |  18k 5523
  1   2  90   8   0   0|   0  5667M|4970B   11k|   0     0 |  18k 5565
  1   2  88  10   0   0|   0  6042M|   0     0 |   0     0 |  16k 5902
  1   2  90   8   0   0|   0  6663M|5894B   11k|   0     0 |  21k 6567
  1   2  90   7   0   0|   0  6479M|   0     0 |   0     0 |  20k 6229
  1   2  90   7   0   0|   0  6808M|7118B   14k|   0     0 |  22k 6660
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--
usr sys idl wai hiq siq| read  writ| recv  send|  in   out | int   csw
  1   2  90   7   0   0|   0  6517M|   0     0 |   0     0 |  20k 6234
  1   2  90   7   0   0|   0  6905M|5090B   11k|   0     0 |  21k 6588
  1   2  90   7   0   0|   0  6696M|   0     0 |   0     0 |  23k 6331
  1   2  89   9   0   0|   0  6668M|1284B 2797B|   0     0 |  19k 6202
  1   1  89   9   0   0|   0  5301M|   0     0 |   0     0 |  15k 5020
  1   2  90   7   0   0|   0  5979M| 240B 1048B|   0     0 |  18k 5876

Yeah, its like that. Imagine what this baby could do when its done with the build. Imagine. I’ll try to show you in a few hours.