Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Aug 10 10:03:51 2026 Auto Mode Machine = Linux oleg231-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg231-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 3760 5717 668072 130320 64 8 5227 19167 801764 735831 64 16 5339 51485 874936 659861 64 32 4890 58231 2133730 1083249 64 64 5138 62313 1385075 1599680 128 4 4168 8635 444501 286973 128 8 5458 28713 1319723 571257 128 16 5779 31612 1022989 1007629 128 32 10515 38173 1306873 659704 128 64 7984 18884 1294270 1406136 128 128 8547 79116 2377579 3199360 256 4 6584 8581 711178 386682 256 8 13630 28932 1103757 669913 256 16 7899 38157 1103757 133819 256 32 12812 52557 450809 1158540 256 64 13037 51270 1280084 1286217 256 128 17370 60053 1461259 1523457 256 256 18276 88244 1802167 2247235 512 4 9027 8321 433852 583110 512 8 14229 6479 539053 150501 512 16 10704 23257 1137555 601737 512 32 11065 24790 1391032 1476130 512 64 19330 73215 1055894 512060 512 128 28005 36020 1614885 1414860 512 256 20442 75672 1500891 1488408 512 512 25507 94428 589190 2237414 1024 4 7831 6973 650180 365846 1024 8 15307 17124 1034232 538702 1024 16 35321 35255 859714 1162119 1024 32 28632 57576 1678504 513518 1024 64 27914 68348 324766 1261072 1024 128 30677 76819 1055584 1279861 1024 256 28956 48356 566408 728231 1024 512 38223 37955 950675 1793451 2048 4 9410 10593 311389 365781 2048 8 12306 10766 605743 377234 2048 16 29335 33961 1617749 942829 2048 32 34222 38621 579195 320307 2048 64 20334 26682 1462911 706943 2048 128 27952 48032 1308682 477834 2048 256 27975 51370 375158 278832 2048 512 35926 73103 905365 180997 4096 4 11584 11321 404348 372327 4096 8 19484 17350 482109 371217 4096 16 24235 28470 336538 429982 4096 32 30381 38214 648913 734973 4096 64 38804 27555 968545 611256 4096 128 33021 31533 532497 747314 4096 256 39970 38554 918620 543017 4096 512 48490 62769 584731 900232 8192 4 6569 9711 533786 421029 8192 8 13632 14818 439839 582113 8192 16 15896 19828 463557 946815 8192 32 23375 33653 754250 660639 8192 64 29619 43203 1198506 1431428 8192 128 34028 48166 623681 775898 8192 256 35303 64841 1423954 757459 8192 512 38155 57473 1513057 960471 16384 4 10103 3885 375289 348232 16384 8 14013 17616 1094384 939126 16384 16 24935 24491 576598 559924 16384 32 27456 40975 1147259 595929 16384 64 32369 34341 975992 878644 16384 128 34765 43952 678484 850364 16384 256 39696 61199 743099 703633 16384 512 42671 61285 1090027 525395 32768 4 7520 7847 258481 329840 32768 8 15040 13717 459696 246449 32768 16 16149 25145 801328 623926 32768 32 23334 23278 566567 759202 32768 64 27336 40234 936546 547282 32768 128 38464 49343 1186815 962317 32768 256 38419 46596 995777 805168 32768 512 37485 42137 507173 605941 65536 4