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 Sep 17 05:05:48 2026 Auto Mode Machine = Linux oleg304-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-oleg304-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 3664 10670 727850 889431 64 8 2231 6380 752329 831569 64 16 5224 29492 1124074 901377 64 32 2139 11974 1124074 1279447 64 64 2394 33864 1279447 1722886 128 4 3683 8660 453896 322289 128 8 6009 18752 561107 795593 128 16 9051 13114 1206978 540217 128 32 6317 41011 1332828 455436 128 64 3740 40315 1074159 1196221 128 128 2248 102323 1492113 1749872 256 4 3865 4471 608074 368375 256 8 6053 6641 203521 541253 256 16 12310 12959 1262029 931416 256 32 12004 10773 1280084 999940 256 64 12089 60605 757326 1019886 256 128 12355 62807 1662639 1629830 256 256 19281 85164 1743637 1652404 512 4 6595 9848 104638 305092 512 8 12376 25305 589190 733478 512 16 6344 16563 626672 288453 512 32 16589 45015 1064266 747521 512 64 17394 87385 613250 890404 512 128 13473 73215 1523247 812577 512 256 15241 64200 840895 929322 512 512 11109 70523 1105920 1463057 1024 4 7144 7309 642400 311053 1024 8 12699 11363 271184 657748 1024 16 15491 25935 671528 754587 1024 32 22738 29751 275781 624376 1024 64 18395 37435 1075676 1153381 1024 128 26389 46421 533085 1229309 1024 256 34431 65397 788384 578851 1024 512 21910 31979 1446698 1274922 2048 4 7094 12378 468121 611914 2048 8 7851 15516 374880 365128 2048 16 15233 18672 655129 441669 2048 32 18158 50246 475954 770756 2048 64 24577 31634 477728 520324 2048 128 35019 36350 1030733 911514 2048 256 55606 88920 868915 1155057 2048 512 31891 85411 397354 692859 4096 4 7377 8297 424185 221285 4096 8 8918 19345 514247 482339 4096 16 14279 24220 722031 768199 4096 32 38913 34357 890619 454255 4096 64 28702 35083 1495487 510655 4096 128 47418 51399 1072816 980149 4096 256 34426 51172 1168634 751137 4096 512 42642 67076 1117912 724956 8192 4 7740 9187 243007 296896 8192 8 13592 15071 487041 524625 8192 16 20727 21985 563830 439108 8192 32 31791 39972 803533 677482 8192 64 33757 47323 917046 526039 8192 128 34747 43889 606635 681811 8192 256 44137 60431 742964 850134 8192 512 37949 3137 1040800 937719 16384 4 7375 9155 273961 226576 16384 8 12660 15975 807288 506807 16384 16 18816 19795 381688 295425 16384 32 22834 28844 578632 445374 16384 64 37574 40833 999646 486472 16384 128 36619 40750 432696 1006439 16384 256 38789 44548 997802 883615 16384 512 37879 57999 913315 894903 32768 4 7311 8566 408716 317515 32768 8 13721 18764 532986 716194 32768 16 18442 21268 580457 510779 32768 32 28389 32898 1118710 949217 32768 64 32351 49573 1018746 687680 32768 128 39170 54639 782709 802840 32768 256 39583 71654 1312870 1162689 32768 512 48495 64195 985594 867660 65536 4 9350 9312 397943 342053 65536 8