Running on a P3-550, with mem=48M, Redhat 6.1 stock raid kernel-2.2.12-20,
with an AHA2940UW and two Quantum Atlas IV running RAID1. Runlevel 1 and
nothing running apart from tiobench.
Notice the improvement in throughput and seek with growing block-sizes [a
device of the benchmark, perhaps?] and too slight variation in chunk-size
to be really accounted for.
Chunk is 4k, Stride is 4 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.136 10.3124 98.3918
/bench 512 4096 2 11.917 9.98318 101.574
/bench 512 4096 4 8.5139 11.0758 108.755
/bench 512 4096 8 7.2364 11.4715 108.087
Chunk is 4k, Stride is 2 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.266 13.6696 115.299
/bench 512 4096 2 12.324 13.2178 118.666
/bench 512 4096 4 8.9587 12.8298 125.094
/bench 512 4096 8 8.0192 13.0665 126.954
Chunk is 4k, Stride is 1 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.371 14.1145 120.037
/bench 512 4096 2 12.249 13.5106 131.685
/bench 512 4096 4 9.1876 13.2496 132.665
/bench 512 4096 8 8.5482 13.7986 140.355
Chunk is 8k, Stride is 8 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.128 11.3823 91.1263
/bench 512 4096 2 11.752 9.94362 102.652
/bench 512 4096 4 8.5381 10.2235 106.930
/bench 512 4096 8 7.3126 11.5183 109.974
Chunk is 8k, Stride is 4 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.398 13.2741 102.241
/bench 512 4096 2 12.549 12.8811 118.060
/bench 512 4096 4 8.8188 13.0511 121.981
/bench 512 4096 8 8.1788 13.0204 124.775
Chunk is 8k, Stride is 2 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.435 14.2972 116.189
/bench 512 4096 2 12.338 13.6340 130.775
/bench 512 4096 4 9.3504 13.7868 132.297
/bench 512 4096 8 8.5547 13.7165 139.565
Chunk is 16k, Stride is 16 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.071 10.9753 88.6342
/bench 512 4096 2 12.130 11.1790 104.958
/bench 512 4096 4 8.5914 10.1130 105.978
/bench 512 4096 8 7.3064 10.7141 109.991
Chunk is 16k, Stride is 8 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.208 13.3267 99.6896
/bench 512 4096 2 12.495 12.9247 117.854
/bench 512 4096 4 8.9208 12.9478 120.037
/bench 512 4096 8 8.1958 13.1780 124.281
Chunk is 16k, Stride is 4 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.387 14.3147 115.432
/bench 512 4096 2 12.511 13.7488 131.295
/bench 512 4096 4 9.2950 13.4259 132.233
/bench 512 4096 8 8.4213 13.6868 141.201
Chunk is 32k, Stride is 32 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.232 10.0265 93.7791
/bench 512 4096 2 12.069 10.4673 103.348
/bench 512 4096 4 8.4990 11.4473 107.530
/bench 512 4096 8 7.2205 10.7598 109.822
Chunk is 32k, Stride is 16 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.307 13.3330 106.701
/bench 512 4096 2 12.398 13.0100 117.755
/bench 512 4096 4 8.8961 12.7446 123.353
/bench 512 4096 8 8.1162 12.9441 125.955
Chunk is 32k, Stride is 8 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 14.614 14.3782 124.956
/bench 512 4096 2 12.347 13.5041 130.474
/bench 512 4096 4 9.2951 13.4689 131.167
/bench 512 4096 8 8.4399 13.4807 140.217
Chunk is 64k, Stride is 64 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.108 11.9119 89.6877
/bench 512 4096 2 15.227 9.56188 92.6033
/bench 512 4096 4 15.246 9.56147 129.181
/bench 512 4096 8 12.571 10.4510 141.393
Chunk is 64k, Stride is 32 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.353 13.4630 113.448
/bench 512 4096 2 12.494 13.0713 119.382
/bench 512 4096 4 8.8512 12.9232 123.489
/bench 512 4096 8 8.2467 12.9673 127.455
Chunk is 64k, Stride is 16 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.172 14.4332 122.968
/bench 512 4096 2 12.362 13.8167 130.201
/bench 512 4096 4 9.2609 13.4655 134.367
/bench 512 4096 8 8.3182 13.6316 138.740
Chunk is 128k, Stride is 128 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.171 11.4481 91.2169
/bench 512 4096 2 12.252 10.0890 102.810
/bench 512 4096 4 8.4695 9.70564 107.007
/bench 512 4096 8 7.3208 11.2406 108.682
Chunk is 128k, Stride is 64 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.385 13.2355 99.8997
/bench 512 4096 2 12.454 12.8476 118.917
/bench 512 4096 4 8.7849 12.9645 124.186
/bench 512 4096 8 8.1072 12.9413 127.723
Chunk is 128k, Stride is 32 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.402 14.3312 114.124
/bench 512 4096 2 12.314 14.0087 133.383
/bench 512 4096 4 9.2216 13.6305 132.013
/bench 512 4096 8 8.5206 13.8933 136.653
Chunk is 256k, Stride is 256 and Block is 1024k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 14.952 10.0196 98.6290
/bench 512 4096 2 12.160 9.94473 104.061
/bench 512 4096 4 8.5039 11.2663 105.273
/bench 512 4096 8 7.2664 11.0190 110.662
Chunk is 256k, Stride is 128 and Block is 2048k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.262 13.3035 112.647
/bench 512 4096 2 12.404 12.7972 119.332
/bench 512 4096 4 8.7295 12.8259 120.995
/bench 512 4096 8 8.1697 13.0024 127.293
Chunk is 256k, Stride is 64 and Block is 4096k
Machine Directory Size(MB) BlkSz Threads Read Write Seeks
----------- ----------- --------- ------- --------- ------ ------- -------
/bench 512 4096 1 15.451 14.3575 112.757
/bench 512 4096 2 12.241 13.6547 132.274
/bench 512 4096 4 9.2616 13.4612 133.482
/bench 512 4096 8 8.4481 13.6096 140.268
Cheers,
--
_/\ Christian Reis is sometimes [EMAIL PROTECTED]
\/~ suicide architect | free software advocate | mountain biker
