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 Sep 7 23:21:28 2026 Auto Mode Machine = Linux oleg221-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-oleg221-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 3042 10713 401966 542506 64 8 6836 40587 1385075 659861 64 16 5266 41077 1780008 1363961 64 32 8955 46203 969761 1734015 64 64 5801 96392 1105556 1879725 128 4 3422 12226 514339 597981 128 8 3701 6404 907174 511887 128 16 9812 23997 1065630 227796 128 32 9635 32217 1319723 927549 128 64 2943 26694 376538 934004 128 128 8499 65013 1526043 2202044 256 4 7701 12559 677522 523570 256 8 10482 9562 822913 337251 256 16 10389 31718 1049800 917096 256 32 10022 25971 1304976 1102624 256 64 11582 57285 2114473 1361224 256 128 6852 56214 1325925 1662639 256 256 6262 37062 1376935 3557725 512 4 6106 7300 88091 201097 512 8 5015 9504 810124 577310 512 16 7505 28151 1034530 557092 512 32 25827 79886 1776533 1418599 512 64 17792 55536 837942 1309596 512 128 31638 72957 1347393 1213400 512 256 32254 72915 1712772 1169140 512 512 27880 71599 1700565 1589779 1024 4 4704 3643 335628 351303 1024 8 9830 8311 800731 206908 1024 16 13518 21349 499774 892775 1024 32 7706 66021 1120288 1104727 1024 64 33058 60908 1630707 715493 1024 128 27667 73876 1123805 768219 1024 256 23457 39092 1038483 1872419 1024 512 20190 18383 881234 1430318 2048 4 5865 11402 141338 132051 2048 8 10334 13680 112973 270286 2048 16 26061 32674 415076 661537 2048 32 20861 21980 613356 1160362 2048 64 37611 26629 680616 606085 2048 128 28100 52895 1564706 911417 2048 256 27632 26163 406012 1412398 2048 512 34229 36429 1257897 1947033 4096 4 5560 5998 173920 151126 4096 8 11262 10668 240006 464197 4096 16 13386 34640 465568 524067 4096 32 32299 38853 579445 669394 4096 64 26900 38290 258519 639207 4096 128 29621 73953 1137754 820009 4096 256 51309 50447 590296 424280 4096 512 36001 79234 676697 846807 8192 4 10931 8195 253975 294589 8192 8 6951 10457 155319 349145 8192 16 36425 39991 716203 1212376 8192 32 40564 30264 828568 331405 8192 64 17029 30483 872433 863683 8192 128 52112 35590 501011 221879 8192 256 50883 40609 248099 213454 8192 512 24115 46615 489658 419477 16384 4 4944 3197 96676 121127 16384 8 7633 7303 259881 287150 16384 16 17403 16133 317396 254884 16384 32 21201 21953 856191 557508 16384 64 24321 34827 742337 770762 16384 128 31186 39543 907645 520571 16384 256 25297 40109 757357 892567 16384 512 31516 45634 560386 580745 32768 4 5334 5998 394301 358527 32768 8 11402 10864 317753 205962 32768 16 16138 18784 338344 404707 32768 32 23349 31739 1086252 896005 32768 64 23064 29471 390691 404544 32768 128 29389 27874