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 Aug 10 18:22:25 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 2489 2103 640954 503814 64 8 639 15841 852702 659861 64 16 3303 53422 855419 1070292 64 32 5248 7971 754443 942521 64 64 3669 40971 1304314 1330167 128 4 5767 3630 196958 130631 128 8 4095 20795 430942 666253 128 16 10561 18743 1121270 1175271 128 32 2916 24427 1266785 1057236 128 64 7581 24820 357483 1387960 128 128 3411 94472 1206978 985435 256 4 3962 3014 613985 139215 256 8 3198 4997 215143 783292 256 16 2592 8478 1070737 680528 256 32 4035 15522 1213534 386821 256 64 11996 48806 1036624 1163562 256 128 10877 94222 1185399 276395 256 256 3081 28738 538809 1098113 512 4 4712 6803 291587 254718 512 8 4305 5798 863551 759685 512 16 4607 7912 412913 869494 512 32 7396 19604 997991 171116 512 64 10872 21020 544106 1179413 512 128 11525 47867 434642 434290 512 256 16393 37872 1560891 1319250 512 512 9538 26524 1764853 1746197 1024 4 3567 6149 267719 563880 1024 8 4042 4215 815323 286048 1024 16 9228 11004 935966 408974 1024 32 11523 20900 972414 1015885 1024 64 19000 16368 1361836 348538 1024 128 25929 58177 1099918 991266 1024 256 33363 26279 796277 1391395 1024 512 8807 45243 1590254 347466 2048 4 4507 4517 159327 92384 2048 8 6354 5808 662557 323333 2048 16 12102 12125 1151187 748264 2048 32 30065 45137 594672 1112425 2048 64 25991 43611 776329 762478 2048 128 26362 38919 1084751 322823 2048 256 41103 67546 1292145 1319537 2048 512 38729 72830 419659 1279062 4096 4 5535 4017 211047 254947 4096 8 5524 12331 272502 426926 4096 16 20742 23513 404376 572074 4096 32 13432 1641 280163 234861 4096 64 14807 29615 283731 490239 4096 128 19206 28679 1592526 478337 4096 256 41421 74949 680719 715595 4096 512 48320 82230 900610 846974 8192 4 5573 5733 318470 313627 8192 8 9173 11052 457679 430520 8192 16 13506 17623 553512 671419 8192 32 22236 24019 590284 597645 8192 64 26085 33862 761117 554933 8192 128 32401 40320 609703 432160 8192 256 25292 47325 748467 737289 8192 512 27805 45187 812694 735631 16384 4 4773 5171 317784 326543 16384 8 8455 10660 340057 336020 16384 16 16286 20048 791108 672824 16384 32 16683 18540 305666 480707 16384 64 18460 30396 1627351 694060 16384 128 30015 32560 683661 636098 16384 256 25460 27990 362332 501379 16384 512 23266 35447 1098337 660727 32768 4 3909 4761 235529 175587 32768 8