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 Aug 27 13:56:45 2026 Auto Mode Machine = Linux oleg236-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-oleg236-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 1930 8567 524487 321554 64 8 2955 20839 780776 852702 64 16 3542 18529 809014 969761 64 32 4837 52760 203082 1033216 64 64 1647 7450 457452 1553394 128 4 1635 3617 597981 363535 128 8 1581 6679 529038 636249 128 16 3705 17728 770474 692017 128 32 2482 11164 1165070 934004 128 64 10025 83277 1162547 1196221 128 128 8428 38017 776042 1755594 256 4 5064 9593 391333 94255 256 8 8081 9150 140656 354627 256 16 5607 22013 118138 344611 256 32 5759 19718 1213534 972763 256 64 7390 60777 1280084 914752 256 128 27990 39708 1384034 2034350 256 256 17063 149446 1540948 2015259 512 4 7438 11307 360025 458785 512 8 8197 14164 298684 674502 512 16 20056 37627 1080328 960496 512 32 19385 51021 687237 689001 512 64 11874 23909 191469 1011625 512 128 13285 49984 50468 1347393 512 256 19219 81762 1329871 1705969 512 512 18151 79489 1652157 534358 1024 4 5499 5677 94684 512782 1024 8 8504 13938 164868 192661 1024 16 5727 11989 463528 68891 1024 32 10839 15156 1286378 1073257 1024 64 14257 27284 1571057 684478 1024 128 22084 105785 523278 238254 1024 256 40953 76848 1022902 1497127 1024 512 16772 65334 1440391 793775 2048 4 7113 7279 396053 235348 2048 8 7626 11237 893592 192337 2048 16 13559 11114 445517 425416 2048 32 12626 17822 1341379 1401796 2048 64 20727 40678 372022 1236708 2048 128 31077 30343 524870 836263 2048 256 24114 63777 972393 782268 2048 512 32554 72952 227935 529758 4096 4 4462 6202 271439 220903 4096 8 9115 7569 381090 528516 4096 16 11193 11610 278922 125022 4096 32 19846 19475 611975 507052 4096 64 19450 25518 405742 600488 4096 128 18398 24434 1522659 303655 4096 256 33271 43182 698601 358325 4096 512 27477 37744 592413 624204 8192 4 5912 7018 335584 428186 8192 8 21365 9542 319251 121783 8192 16 16536 9684 677816 571673 8192 32 11674 13393 195037 284522 8192 64 14337 20124 475529 386965 8192 128 13278 29008 370045 303754 8192 256 23844 26670 392656 316525 8192 512 18452 34969 804003 396284 16384 4 3132 3212 148899 134024 16384 8 5533 7938 298379 271043 16384 16 9398 13845 505458 500962 16384 32 35419 32567 1049844 796112 16384 64 18846 34816 350819 374277 16384 128 29361 44504 569068 514106 16384 256 31853 37845 1407787 993561 16384 512