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: Sat Sep 5 21:36:21 2026 Auto Mode Machine = Linux oleg344-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-oleg344-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 1477 7897 640954 614542 64 8 3068 8164 743988 499130 64 16 3238 7902 1049372 901377 64 32 2274 22046 1363961 1033216 64 64 4020 39976 1255511 1124074 128 4 2341 4146 535368 467329 128 8 4845 16054 819893 757430 128 16 3957 21135 887675 452366 128 32 5389 63304 1306873 753179 128 64 9477 30046 1206978 1102844 128 128 9832 66495 1319723 1858934 256 4 5215 9573 580461 208299 256 8 8863 8774 493264 707430 256 16 6697 18604 453858 833776 256 32 10050 23201 502969 473263 256 64 9096 21059 1325925 870268 256 128 8173 20078 1292410 868157 256 256 10309 16203 1523457 88309 512 4 3271 4363 560144 257683 512 8 9424 12792 578399 608041 512 16 10830 20829 785241 613951 512 32 11089 25996 1316016 1213400 512 64 13724 30112 605811 1267845 512 128 14673 33527 392105 1450212 512 256 23406 74786 658978 1566585 512 512 13952 72440 1391933 990168 1024 4 7376 6574 458383 480539 1024 8 9228 12308 631259 126030 1024 16 15854 22374 352254 810248 1024 32 15991 17522 1052480 528363 1024 64 27297 47376 1267398 859026 1024 128 19108 35132 775852 469559 1024 256 31352 68687 1000037 460447 1024 512 23119 74293 747496 783494 2048 4 4721 5835 246866 314686 2048 8 10456 7319 892757 784053 2048 16 14859 23539 333449 995149 2048 32 15085 38145 811381 1254223 2048 64 21682 42344 519380 1109408 2048 128 25793 62996 610956 349613 2048 256 28503 55997 1627866 1398828 2048 512 17222 28804 447956 687700 4096 4 7058 4666 154309 158465 4096 8 13499 21382 621720 655050 4096 16 22552 39989 570233 566696 4096 32 32196 33282 668066 657884 4096 64 51809 62684 1491074 1303598 4096 128 24830 29729 695997 496186 4096 256 24282 30003 1020194 461058 4096 512 48154 51356 750186 441803 8192 4 6805 13201 188995 160614 8192 8 14121 12517 451621 702383 8192 16 20855 2817 339282 198859 8192 32 15663 10576 413361 537283 8192 64 30846 33377 614468 491599 8192 128 18969 39382 460587 551947 8192 256 23511 47716 300316 325985 8192 512 18723 32072 1502340 1103296 16384 4 5200 4698 391174 298836 16384 8 17270 12409 261141 212385 16384 16 9884 15853 215751 230874 16384 32 19828 16783 410359 265199 16384 64 43307 62104 794685 413831 16384 128 24471 39233 780488 649051 16384 256 29232 64066 1056770 821582 16384 512 56742 58224 721511 531774 32768 4 8256 7573 336475 400244 32768 8 12999 13875 320861 225659 32768 16 17775 19300 932524 382642 32768 32 29177 42582 895427 561856 32768 64 28468 31986 557944 571698 32768 128 36197 47916 925073 881522 32768 256 52909 49835 662379 889613 32768 512 48283 59802 1090120 781174 65536 4