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: Thu Jul 16 16:20:44 2026 Auto Mode Machine = Linux oleg432-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-oleg432-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 3552 18598 615952 97833 64 8 3495 14601 598110 659861 64 16 4760 34745 901377 780776 64 32 5912 47336 1105556 576282 64 64 3171 50393 1204796 1249666 128 4 4370 10738 447464 739689 128 8 5853 14348 1000121 739689 128 16 7236 37792 1015251 670413 128 32 12582 14316 771581 927549 128 64 8670 77865 895074 962469 128 128 5833 97705 1391557 1543594 256 4 5135 14290 401878 480463 256 8 8088 25518 814795 473263 256 16 16181 37932 797250 999940 256 32 18728 56510 588736 1180188 256 64 16883 70544 1201314 568777 256 128 14559 49043 1453348 1610276 256 256 14128 65556 1629830 1924938 512 4 9927 14670 555938 516122 512 8 13133 13656 843537 859060 512 16 15709 31374 924123 1087440 512 32 17757 32943 626672 920558 512 64 20400 71428 1303238 1157794 512 128 20638 78253 659788 774759 512 256 23026 71012 1506154 1429934 512 512 29310 106112 803757 1556366 1024 4 11508 15758 395200 355049 1024 8 12861 19401 645296 242820 1024 16 15060 42232 1067654 988301 1024 32 32727 49124 340902 1309518 1024 64 24415 42348 1410588 897438 1024 128 25284 88611 1239598 1142641 1024 256 42413 73011 709114 1071116 1024 512 45681 94316 1838751 1697745 2048 4 13730 15302 518221 383670 2048 8 19449 19949 713579 643835 2048 16 28204 42435 793175 679271 2048 32 31228 65773 1328928 1159578 2048 64 29819 41288 975263 1181103 2048 128 34424 81418 1571577 1365257 2048 256 54671 85077 1349174 1357275 2048 512 53591 115805 1382840 1095123 4096 4 10733 9993 271726 385728 4096 8 10459 19810 465657 340932 4096 16 21647 22674 445065 951909 4096 32 24542 36150 425246 506186 4096 64 36125 40855 457961 730908 4096 128 34337 62685 750612 722425 4096 256 42956 68138 520053 422527 4096 512 25021 75893 457753 519738 8192 4 8379 10011 605684 492960 8192 8 9485 11646 558487 522249 8192 16 22513 28191 606860 395385 8192 32 19758 59106 816188 906785 8192 64 19541 47720 729276 343536 8192 128 24631 37037 1010259 728117 8192 256 29117 45101 1260130 654000 8192 512 39849 53130 623432 664613 16384 4 9325 3533 259671 522483 16384 8 12680 12655 629116 222602 16384 16 14780 11557 287095 362261 16384 32 12384 21294 867245 625679 16384 64 18849 27937 1011178 481401 16384 128 19149 31831 749976 545280 16384 256 29368 32863 1234478 709502 16384 512 23610 46320 418728 501807 32768 4 6545 8625 371767 442954 32768 8 15960 15333 706511 311219 32768 16 22967 24294 925572 780376 32768 32 23745 38379 581580 548924 32768 64 34751 44643 581713 439857 32768 128 32609 40524 556654 578398 32768 256 42641 53243 1236531 913319 32768 512 37199 54742 696613 823812 65536 4