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: Wed Aug 19 02:19:04 2026 Auto Mode Machine = Linux oleg453-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-oleg453-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 1318 7449 256923 520419 64 8 3755 12861 754443 653436 64 16 2773 32436 789967 955947 64 32 4536 28032 1183548 901377 64 64 4331 36909 1087638 1599680 128 4 2635 5209 402510 234871 128 8 4107 17529 556454 643108 128 16 3716 13858 948860 672934 128 32 8108 13654 1142750 992724 128 64 7025 47974 1133103 636249 128 128 7430 73900 1391557 2035099 256 4 3642 8556 626159 192054 256 8 4454 15534 944525 814795 256 16 5379 11637 984356 630572 256 32 9153 22592 1173737 462858 256 64 10318 70544 1345868 697322 256 128 9501 37585 1514860 1534342 256 256 17486 49842 80836 2458168 512 4 6068 8415 565751 517739 512 8 5448 13434 483470 470649 512 16 11465 18352 890404 495176 512 32 12942 35417 1350783 975328 512 64 17182 58641 1454140 543006 512 128 16474 54766 1488408 186254 512 256 18159 71031 568899 926116 512 512 16868 51675 1700565 802555 1024 4 6514 6594 108996 540668 1024 8 7084 8571 523214 514810 1024 16 8686 15288 426477 617287 1024 32 13092 28018 766437 530321 1024 64 14828 20529 840698 983774 1024 128 28429 65389 601636 633681 1024 256 20333 55800 626745 938625 1024 512 26867 84690 1010864 1793451 2048 4 7120 8846 250152 276757 2048 8 9954 10903 225600 560634 2048 16 13726 15894 499507 423403 2048 32 20889 38605 987030 774300 2048 64 37792 34578 843903 664505 2048 128 31543 73777 967356 866636 2048 256 46922 56068 1211077 714529 2048 512 43594 77945 730386 1360715 4096 4 7750 7295 371385 278091 4096 8 12659 12987 337145 252712 4096 16 16492 23625 800933 575775 4096 32 22424 38486 694478 603145 4096 64 35398 46480 858486 477287 4096 128 36602 64355 1019891 758801 4096 256 38164 76155 1045970 1081324 4096 512 38060 68279 1010651 891589 8192 4 7743 7934 314060 199522 8192 8 14564 14356 455084 288064 8192 16 23469 23414 517990 648715 8192 32 26392 34138 857818 685005 8192 64 26277 42986 1031737 785638 8192 128 37925 73413 786321 587076 8192 256 42145 56490 633233 632685 8192 512 43705 71326 1188967 606507 16384 4 8265 9286 296720 296183 16384 8 11793 11268 331989 384979 16384 16 14960 21254 422954 734285 16384 32 26137 34561 1007058 566469 16384 64 27408 36657 818743 1062916 16384 128 26871 47252 539036 470533 16384 256 33728 41568 887151 606704 16384 512 30021 43200 858512 695444 32768 4 6345 6680 233325 220278 32768 8 11047 14029 505601 761832 32768 16 14590 20707 491570 593128 32768 32 19257 31261 908484 570452 32768 64 27854 42963 785222 585193 32768 128 33437 42576 690041 602795 32768 256 30973 44992 1000430 581703 32768 512 32264 44814 382969 660114 65536 4