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The sgpdd-survey benchmark simulates parallel I/O using raw unformatted LUNs. The tests spawn and increasing number of threads (thr) that write and read to an increasing number of concurrent regions (crg). As the tests progress, I/O becomes more random. This set of tests transfer data in 1MB records (rsz).
One 15-disk LUNs
Max aggregate write speed is ~1GB/sec and max , Max read is also ~1GB/sec:
Mon Oct 6 10:26:06 PDT 2014 sgpdd-survey on /dev/raw/raw1 from fermi-gpfs01
total_size 8388608K rsz 1024 crg 1 thr 1 write 438.64 MB/s 1 x 438.94 = 438.94 MB/s read 893.60 MB/s 1 x 894.41 = 894.41 MB/s
total_size 8388608K rsz 1024 crg 1 thr 2 write 482.91 MB/s 1 x 483.15 = 483.15 MB/s read 882.93 MB/s 1 x 883.72 = 883.72 MB/s
total_size 8388608K rsz 1024 crg 1 thr 4 write 469.27 MB/s 1 x 469.49 = 469.49 MB/s read 871.93 MB/s 1 x 872.71 = 872.71 MB/s
total_size 8388608K rsz 1024 crg 1 thr 8 write 476.82 MB/s 1 x 477.05 = 477.05 MB/s read 876.47 MB/s 1 x 877.22 = 877.22 MB/s
total_size 8388608K rsz 1024 crg 1 thr 16 write 473.50 MB/s 1 x 474.09 = 474.09 MB/s read 869.43 MB/s 1 x 870.23 = 870.23 MB/s
total_size 8388608K rsz 1024 crg 2 thr 2 write 813.07 MB/s 2 x 406.87 = 813.73 MB/s read 489.03 MB/s 2 x 244.65 = 489.29 MB/s
total_size 8388608K rsz 1024 crg 2 thr 4 write 855.20 MB/s 2 x 427.98 = 855.96 MB/s read 482.71 MB/s 2 x 241.48 = 482.96 MB/s
total_size 8388608K rsz 1024 crg 2 thr 8 write 848.02 MB/s 2 x 424.39 = 848.77 MB/s read 493.07 MB/s 2 x 246.66 = 493.32 MB/s
total_size 8388608K rsz 1024 crg 2 thr 16 write 835.96 MB/s 2 x 418.38 = 836.75 MB/s read 480.13 MB/s 2 x 240.18 = 480.37 MB/s
total_size 8388608K rsz 1024 crg 2 thr 32 write 830.18 MB/s 2 x 415.48 = 830.96 MB/s read 487.15 MB/s 2 x 243.70 = 487.40 MB/s
total_size 8388608K rsz 1024 crg 4 thr 4 write 1042.60 MB/s 4 x 260.93 = 1043.70 MB/s read 669.98 MB/s 4 x 167.62 = 670.47 MB/s
total_size 8388608K rsz 1024 crg 4 thr 8 write 972.11 MB/s 4 x 243.27 = 973.09 MB/s read 668.05 MB/s 4 x 167.13 = 668.53 MB/s
total_size 8388608K rsz 1024 crg 4 thr 16 write 1019.04 MB/s 4 x 255.04 = 1020.16 MB/s read 640.78 MB/s 4 x 160.30 = 641.21 MB/s
total_size 8388608K rsz 1024 crg 4 thr 32 write 1034.45 MB/s 4 x 258.92 = 1035.69 MB/s read 656.30 MB/s 4 x 164.19 = 656.78 MB/s
total_size 8388608K rsz 1024 crg 4 thr 64 write 1016.87 MB/s 4 x 254.52 = 1018.07 MB/s read 644.36 MB/s 4 x 161.21 = 644.84 MB/s
total_size 8388608K rsz 1024 crg 8 thr 8 write 823.00 MB/s 8 x 102.97 = 823.75 MB/s read 866.24 MB/s 8 x 108.39 = 867.08 MB/s
total_size 8388608K rsz 1024 crg 8 thr 16 write 788.51 MB/s 8 x 98.66 = 789.26 MB/s read 862.38 MB/s 8 x 107.90 = 863.19 MB/s
total_size 8388608K rsz 1024 crg 8 thr 32 write 781.63 MB/s 8 x 97.79 = 782.32 MB/s read 863.46 MB/s 8 x 108.03 = 864.26 MB/s
total_size 8388608K rsz 1024 crg 8 thr 64 write 790.44 MB/s 8 x 98.90 = 791.17 MB/s read 868.12 MB/s 8 x 108.63 = 869.06 MB/s
total_size 8388608K rsz 1024 crg 8 thr 128 write 787.10 MB/s 8 x 98.49 = 787.89 MB/s read 847.31 MB/s 8 x 106.02 = 848.16 MB/s
total_size 8388608K rsz 1024 crg 16 thr 16 write 609.99 MB/s 16 x 38.16 = 610.50 MB/s read 1028.24 MB/s 16 x 64.33 = 1029.36 MB/s
total_size 8388608K rsz 1024 crg 16 thr 32 write 585.41 MB/s 16 x 36.61 = 585.78 MB/s read 1018.23 MB/s 16 x 63.72 = 1019.59 MB/s
total_size 8388608K rsz 1024 crg 16 thr 64 write 589.83 MB/s 16 x 36.89 = 590.21 MB/s read 1009.79 MB/s 16 x 63.18 = 1010.89 MB/s
total_size 8388608K rsz 1024 crg 16 thr 128 write 585.71 MB/s 16 x 36.64 = 586.24 MB/s read 1024.85 MB/s 16 x 64.13 = 1026.00 MB/s
total_size 8388608K rsz 1024 crg 16 thr 256 write 596.42 MB/s 16 x 37.31 = 596.92 MB/s read 1008.59 MB/s 16 x 63.11 = 1009.83 MB/s
total_size 8388608K rsz 1024 crg 32 thr 32 write 667.16 MB/s 32 x 20.88 = 668.03 MB/s read 946.89 MB/s 32 x 29.62 = 947.88 MB/s
total_size 8388608K rsz 1024 crg 32 thr 64 write 695.57 MB/s 32 x 21.76 = 696.41 MB/s read 960.61 MB/s 32 x 30.06 = 961.91 MB/s
total_size 8388608K rsz 1024 crg 32 thr 128 write 694.31 MB/s 32 x 21.72 = 695.19 MB/s read 956.88 MB/s 32 x 29.94 = 957.95 MB/s
total_size 8388608K rsz 1024 crg 32 thr 256 write 682.67 MB/s 32 x 21.36 = 683.59 MB/s read 951.72 MB/s 32 x 29.79 = 953.37 MB/s
total_size 8388608K rsz 1024 crg 64 thr 64 write 659.29 MB/s 64 x 10.32 = 660.40 MB/s read 757.79 MB/s 64 x 11.85 = 758.67 MB/s
total_size 8388608K rsz 1024 crg 64 thr 128 write 656.74 MB/s 64 x 10.28 = 657.96 MB/s read 757.13 MB/s 64 x 11.84 = 758.06 MB/s
total_size 8388608K rsz 1024 crg 64 thr 256 write 644.79 MB/s 64 x 10.10 = 646.36 MB/s read 756.03 MB/s 64 x 11.84 = 757.45 MB/s
total_size 8388608K rsz 1024 crg 128 thr 128 write 602.88 MB/s 128 x 4.73 = 605.47 MB/s read 638.55 MB/s 128 x 5.01 = 640.87 MB/s
total_size 8388608K rsz 1024 crg 128 thr 256 write 588.55 MB/s 128 x 4.61 = 589.60 MB/s read 623.18 MB/s 128 x 4.88 = 625.00 MB/s
total_size 8388608K rsz 1024 crg 256 thr 256 write 470.98 MB/s 256 x 1.84 = 471.19 MB/s read 564.40 MB/s 256 x 2.22 = 568.85 MB/s
...
Four 15-disk LUNs
Max write ~2GB/sec , Max read ~3.7GB/sec
total_size 33554432K rsz 1024 crg 4 thr 4 write 1328.92 MB/s 4 x 332.39 = 1329.57 MB/s read 2911.00 MB/s 4 x 728.76 = 2915.04 MB/s
total_size 33554432K rsz 1024 crg 4 thr 8 write 1454.79 MB/s 4 x 364.14 = 1456.57 MB/s read 2895.55 MB/s 4 x 724.64 = 2898.56 MB/s
total_size 33554432K rsz 1024 crg 4 thr 16 write 1456.28 MB/s 4 x 364.27 = 1457.10 MB/s read 2458.23 MB/s 4 x 615.12 = 2460.48 MB/s
total_size 33554432K rsz 1024 crg 4 thr 32 write 1445.62 MB/s 4 x 361.72 = 1446.88 MB/s read 2994.64 MB/s 4 x 749.94 = 2999.76 MB/s
total_size 33554432K rsz 1024 crg 4 thr 64 write 1434.84 MB/s 4 x 358.97 = 1435.89 MB/s read 2740.28 MB/s 4 x 685.58 = 2742.31 MB/s
total_size 33554432K rsz 1024 crg 8 thr 8 write 2001.29 MB/s 8 x 250.36 = 2002.87 MB/s read 1639.01 MB/s 8 x 204.96 = 1639.71 MB/s
total_size 33554432K rsz 1024 crg 8 thr 16 write 1980.60 MB/s 8 x 247.88 = 1983.03 MB/s read 1440.08 MB/s 8 x 180.07 = 1440.58 MB/s
total_size 33554432K rsz 1024 crg 8 thr 32 write 1947.07 MB/s 8 x 243.69 = 1949.54 MB/s read 1661.00 MB/s 8 x 207.72 = 1661.76 MB/s
total_size 33554432K rsz 1024 crg 8 thr 64 write 2016.98 MB/s 8 x 252.47 = 2019.73 MB/s read 1715.79 MB/s 8 x 214.57 = 1716.54 MB/s
total_size 33554432K rsz 1024 crg 8 thr 128 write 1961.61 MB/s 8 x 245.53 = 1964.26 MB/s read 1682.21 MB/s 8 x 210.47 = 1683.73 MB/s
total_size 33554432K rsz 1024 crg 16 thr 16 write 2097.46 MB/s 16 x 131.28 = 2100.52 MB/s read 2379.03 MB/s 16 x 148.78 = 2380.52 MB/s
total_size 33554432K rsz 1024 crg 16 thr 32 write 2078.31 MB/s 16 x 130.00 = 2080.08 MB/s read 2389.99 MB/s 16 x 149.53 = 2392.43 MB/s
total_size 33554432K rsz 1024 crg 16 thr 64 write 2075.24 MB/s 16 x 129.81 = 2077.03 MB/s read 2193.77 MB/s 16 x 137.20 = 2195.13 MB/s
total_size 33554432K rsz 1024 crg 16 thr 128 write 2088.21 MB/s 16 x 130.62 = 2090.00 MB/s read 2206.04 MB/s 16 x 137.96 = 2207.34 MB/s
total_size 33554432K rsz 1024 crg 16 thr 256 write 2085.91 MB/s 16 x 130.49 = 2087.86 MB/s read 2393.09 MB/s 16 x 149.68 = 2394.87 MB/s
total_size 33554432K rsz 1024 crg 32 thr 32 write 2008.13 MB/s 32 x 62.81 = 2009.89 MB/s read 3197.92 MB/s 32 x 100.09 = 3202.82 MB/s
total_size 33554432K rsz 1024 crg 32 thr 64 write 1979.69 MB/s 32 x 61.92 = 1981.51 MB/s read 3190.03 MB/s 32 x 99.79 = 3193.36 MB/s
total_size 33554432K rsz 1024 crg 32 thr 128 write 1997.90 MB/s 32 x 62.49 = 1999.82 MB/s read 3237.11 MB/s 32 x 101.26 = 3240.36 MB/s
total_size 33554432K rsz 1024 crg 32 thr 256 write 2005.33 MB/s 32 x 62.71 = 2006.84 MB/s read 3213.86 MB/s 32 x 100.64 = 3220.52 MB/s
total_size 33554432K rsz 1024 crg 32 thr 512 write 1981.90 MB/s 32 x 62.00 = 1983.95 MB/s read 3277.99 MB/s 32 x 102.53 = 3280.94 MB/s
total_size 33554432K rsz 1024 crg 64 thr 64 write 1986.19 MB/s 64 x 31.06 = 1987.92 MB/s read 3835.45 MB/s 64 x 60.01 = 3840.33 MB/s
total_size 33554432K rsz 1024 crg 64 thr 128 write 1985.35 MB/s 64 x 31.06 = 1987.92 MB/s read 3804.40 MB/s 64 x 59.53 = 3809.81 MB/s
total_size 33554432K rsz 1024 crg 64 thr 256 write 2009.90 MB/s 64 x 31.47 = 2014.16 MB/s read 3827.19 MB/s 64 x 59.99 = 3839.11 MB/s
total_size 33554432K rsz 1024 crg 64 thr 512 write 1986.98 MB/s 64 x 31.09 = 1989.75 MB/s read 3876.90 MB/s 64 x 60.76 = 3888.55 MB/s
total_size 33554432K rsz 1024 crg 64 thr 1024 write 1978.71 MB/s 64 x 30.96 = 1981.20 MB/s read 3807.05 MB/s 64 x 59.57 = 3812.26 MB/s
total_size 33554432K rsz 1024 crg 128 thr 128 write 1999.93 MB/s 128 x 15.65 = 2003.17 MB/s read 3608.74 MB/s 128 x 28.24 = 3614.50 MB/s
total_size 33554432K rsz 1024 crg 128 thr 256 write 2016.86 MB/s 128 x 15.80 = 2022.71 MB/s read 3600.97 MB/s 128 x 28.17 = 3605.96 MB/s
total_size 33554432K rsz 1024 crg 128 thr 512 write 2012.85 MB/s 128 x 15.75 = 2016.60 MB/s read 3541.17 MB/s 128 x 27.71 = 3547.36 MB/s
total_size 33554432K rsz 1024 crg 128 thr 1024 write 2012.09 MB/s 128 x 15.75 = 2016.60 MB/s read 3506.41 MB/s 128 x 27.54 = 3525.39 MB/s
total_size 33554432K rsz 1024 crg 256 thr 256 write 1868.84 MB/s 256 x 7.61 = 1948.24 MB/s read 2809.95 MB/s 256 x 11.05 = 2829.59 MB/s
total_size 33554432K rsz 1024 crg 256 thr 512 write 1944.84 MB/s 256 x 7.65 = 1958.01 MB/s read 2729.52 MB/s 256 x 10.76 = 2753.91 MB/s
total_size 33554432K rsz 1024 crg 256 thr 1024 write 1960.35 MB/s 256 x 7.69 = 1967.77 MB/s read 2814.37 MB/s 256 x 11.07 = 2834.47 MB/s
total_size 33554432K rsz 1024 crg 512 thr 512 write 1671.90 MB/s 512 x 3.29 = 1684.57 MB/s read 2378.45 MB/s 512 x 4.67 = 2392.58 MB/s
total_size 33554432K rsz 1024 crg 512 thr 1024 write 1637.35 MB/s 512 x 3.22 = 1650.39 MB/s read 2373.27 MB/s 512 x 4.68 = 2397.46 MB/s
total_size 33554432K rsz 1024 crg 1024 thr 1024 write 1231.95 MB/s 1024 x 1.20 = 1230.47 MB/s read 2094.72 MB/s 1024 x 2.06 = 2109.38 MB/s
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