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: Wed Sep 9 04:23:47 2026 Auto Mode Machine = Linux oleg455-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-oleg455-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 1902 5336 35597 476959 64 8 4043 14725 720041 119208 64 16 5870 10512 929467 877797 64 32 2952 57767 1101022 94393 64 64 3056 63613 1124074 1484662 128 4 2603 5463 463696 551878 128 8 6514 10589 776042 684081 128 16 9606 29706 824932 809997 128 32 10112 15726 1162547 935631 128 64 6989 47181 1085013 1206978 128 128 8850 44784 702889 1749872 256 4 5066 10100 476624 575175 256 8 11152 17860 433169 695516 256 16 8318 10322 1007446 762164 256 32 19872 47110 1080434 524593 256 64 12154 38375 1224606 996229 256 128 7578 33862 1415041 1132871 256 256 8146 26463 1572543 2030503 512 4 5373 7807 325929 380098 512 8 4281 14101 329479 555938 512 16 11253 19083 446758 457124 512 32 11314 38004 827289 849208 512 64 18024 60385 1108203 1098566 512 128 14420 16435 1382969 1078159 512 256 25240 51800 870552 1501940 512 512 36163 100416 392033 1488408 1024 4 11526 10663 391134 499484 1024 8 11838 7189 178556 594310 1024 16 8707 9738 293155 447961 1024 32 23031 37562 378718 501935 1024 64 34261 26804 207368 634898 1024 128 25468 32355 1278338 601299 1024 256 18215 26790 1381548 1315938 1024 512 41335 94981 1035479 1084640 2048 4 6965 6428 204513 188931 2048 8 6829 13295 246060 815308 2048 16 18008 16176 431529 539372 2048 32 22376 31450 732504 1037456 2048 64 22153 47186 850841 619103 2048 128 29891 33425 1488515 1284033 2048 256 35327 54552 635453 410259 2048 512 22311 55954 687480 552023 4096 4 4432 5994 183455 272377 4096 8 6330 9529 249951 507622 4096 16 12357 14443 450799 283576 4096 32 20730 20633 846473 642314 4096 64 14944 27633 184962 382303 4096 128 27566 34334 478723 768612 4096 256 34010 38886 610800 338287 4096 512 33414 32185 1742237 525654 8192 4 4024 5119 159092 273304 8192 8 8901 8688 325235 162995 8192 16 11187 14654 415988 242316 8192 32 16974 27600 703187 510410 8192 64 26916 29072 375398 216875 8192 128 20001 40297 369842 374591 8192 256 25742 41786 1173135 511139 8192 512 31608 47233 228413 444902 16384 4 5114 6403 312070 246265 16384 8 8711 10202 498506 484360 16384 16 13194 12367 259885 577650 16384 32 13943 18345 199437 258523 16384 64 17300 28111 576414 470466 16384 128 20084 29303 770606 568969 16384 256 26221 25585 535775 506210 16384 512 24613 51889 257464 252375 32768 4