On Mon, 7 Jul 2008, Justin Piszcz wrote:
On Mon, 7 Jul 2008, Justin Piszcz wrote:
Each PCI-e x1 card has 1 veliciraptor on it now.
Got an x4 card wit 4 sata ports:
Not quite the > 1 gbyte/sec I was hoping for in regards to the reads
but pretty close!
Going to remove one of the drives from the x1 card and put it on the x4
card instead, then I will use all 4 SATA ports on the x4 and hopefully get
better bw.
Four drives on the x4 card, MAX bandwidth for every disk.
p34:~# dd if=/dev/sdi of=/dev/null bs=1M &
[1] 4720
p34:~# dd if=/dev/sdj of=/dev/null bs=1M &
[2] 4721
p34:~# dd if=/dev/sdk of=/dev/null bs=1M &
[3] 4722
p34:~# dd if=/dev/sdl of=/dev/null bs=1M &
[4] 4723
p34:~#
120MiB/s per each one!
Re-running dd test with all 12 disks:
1.1 gigabytes per second read!
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 120 59104 6632220 52228 0 0 0 40 168 517 0 0 100 0
0 0 120 59104 6632220 52228 0 0 0 0 20 291 0 0 100 0
3 10 120 43516 6635576 51924 0 0 1051776 62 4221 12301 1 70 11 19
6 9 160 44420 6634720 51788 0 0 1117284 0 4435 12308 1 75 5 19
6 9 160 47436 6631100 51676 0 0 1110300 0 4449 11438 1 76 3 20
2 10 160 46740 6632048 51948 0 0 1137920 0 4447 12251 1 75 8 17
9 7 160 45248 6632056 52004 0 8 1127940 45 4559 13259 1 74 9 17
3 9 160 44152 6634780 49960 0 0 1132032 12 4471 12962 0 75 8 16
4 9 160 44160 6634960 49380 0 0 1129216 8 4430 12545 0 76 7 16
After:
About the same for write:
$ dd if=/dev/zero of=bigfile.1 bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 20.4056 s, 526 MB/s
'nuff said for read :)
$ dd if=bigfile.1 of=/dev/null bs=1M count=10240
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 10.2841 s, 1.0 GB/s
Justin.
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