Randy Schultz wrote:
On Tue, 15 May 2007, Kevin Kobb spaketh thusly:
-}These reports on poor performance using mpt seem to be on SATA
-}drives. Has anybody been seeing this using SAS drives?
-}
-}We are testing Dell PE840s with hot swap SAS drives, and seem to get decent
-}performance, though I haven't run any benchmarks yet. Any opinions if the
-}PERC5i/mfi is a better choice than the SAS5iR/mpt combination?
Would it be possible for you to install blogbench and give it a quick run
while your system is idle? We will be ordering a new box in 1-2 months that
we need high disk I/O capabilities. We've been looking at the PERC5i set up
RAID 5 with 4-6 SAS drives. I'ld be interested in what you're seeing for
throughput on the PERC5i.
I have attached some blogbench tests from the following configs:
Perc5i 4 * SAS 15K RPM 146 Gig disks in raid 5.
Perc5e 15 * SATA 7.2K RPM 500 Gig disks in raid 50 (3 raid 5 volumes 5
disks each)
Other configurations that I may be able to test are 2 SATA in raid 1 and
2 SAS in raid 1 (both on perc5i).
Perc5i 4 * SAS 15K RPM 146 Gig disks in raid 5.
CPU: Intel(R) Xeon(R) CPU 5160 @ 3.00GHz (2995.54-MHz K8-class CPU)
Frequency = 10 secs
Scratch dir = [/data]
Spawning 3 writers...
Spawning 1 rewriters...
Spawning 5 commenters...
Spawning 100 readers...
Benchmarking for 30 iterations.
The test will run during 5 minutes.
Nb blogs R articles W articles R pictures W pictures R comments
W comments
15 13958 890 11193 986 10196
3139
29 22525 902 16806 636 14457
2668
41 22776 730 17004 718 14427
2473
50 20498 528 14791 664 10622
2184
57 16051 494 11838 514 8818
1630
67 25084 655 30781 748 15000
2578
74 15590 447 11598 345 8768
1270
78 10908 327 8137 211 6505
915
92 26503 1106 18745 613 15369
2827
96 16371 339 10909 373 7937
1103
103 15408 402 10736 287 9274
1140
114 22229 666 15143 566 10028
2079
122 17964 471 12721 466 9633
1551
127 17699 376 11947 289 9238
1061
134 12314 325 9021 431 6934
1293
139 20510 529 14899 471 12919
1684
143 19382 455 13374 253 10189
1080
147 10657 272 7126 214 5208
821
159 22676 657 14956 586 13469
2007
163 17458 147 11940 283 10322
759
168 14347 221 9881 274 7397
777
177 20031 616 13832 541 12240
1796
178 13840 135 9766 168 9133
488
184 19061 320 12801 246 10504
849
189 18462 501 12587 469 10500
1753
192 16019 228 10975 258 10133
769
194 14234 128 10232 220 6950
520
197 11275 82 8126 180 6392
501
204 19404 482 14123 424 12712
1495
204 11758 105 7814 160 8072
444
Final score for writes: 204
Final score for reads : 10414
Perc5e 15 * SATA 7.2K RPM 500 Gig disks in raid 50 (3 raid 5 volumes 5 disks
each)
CPU: Intel(R) Xeon(R) CPU 5110 @ 1.60GHz (1597.64-MHz K8-class CPU)
Frequency = 10 secs
Scratch dir = [/compere/test]
Spawning 3 writers...
Spawning 1 rewriters...
Spawning 5 commenters...
Spawning 100 readers...
Benchmarking for 30 iterations.
The test will run during 5 minutes.
Nb blogs R articles W articles R pictures W pictures R comments
W comments
1 4314 189 1999 109 341
439
5 14061 329 10016 250 9840
873
14 28924 416 23146 464 11733
1317
23 31039 470 23999 531 14171
1444
31 34713 523 27226 527 17347
1470
41 35581 416 27988 626 21633
1390
51 38418 491 29663 517 21576
1307
56 41466 506 32501 488 24634
1370
61 53966 561 41339 386 31210
1237
68 55243 504 42738 423 30776
1279
76 50607 508 38520 420 26856
1278
83 46003 471 35468 481 26124
1222
88 51993 483 40542 369 31031
1143
96 54179 505 42080 362 31857
1118
102 54421 349 40906 344 29561
940
106 60051 501 45166 354 33161
1113
113 62562 432 46139 347 37840
1041
120 67518 403 49800 463 40662
1148
128 62442 459 46504 357 35074
1062
134 62545 350 47605 391 38809
967
139 86653 402 64632 342 51244
1009
145 69267 377 52526 429 40214
1065
152 59945 390 45232 338 35558
929
158 81802 386 61518 412 48679
1078
164 71721 431 53173 317 40869
992
170 81977 432 61320 264 46273
886
174 77979 405 58017 323 45199
962
183 73185 367 54622 343 38939
956
189 74043 402 54737 299 42417
942
195 74745 325 57095 408 41014
962
Final score for writes: 195
Final score for reads : 35412
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