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: Sat Aug 22 03:39:05 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 2710 14398 538156 565358 64 8 3480 18093 799377 372410 64 16 6773 31919 1049372 743988 64 32 7195 28815 1279447 1087638 64 64 5060 79919 1518251 1679761 128 4 4498 6277 539674 600657 128 8 7545 21996 707520 135854 128 16 4776 47918 425141 606767 128 32 9648 42270 1266785 1152564 128 64 10100 54789 1123617 1319723 128 128 12834 33333 1196221 2035099 256 4 7417 15466 251179 112483 256 8 10075 8029 340891 842278 256 16 16533 37052 608074 1004618 256 32 11375 49184 735537 316103 256 64 10501 32384 136109 641497 256 128 18649 92685 1610276 1376935 256 256 18453 78888 1122215 1552085 512 4 2544 7148 372645 122693 512 8 5226 9623 458393 141200 512 16 20817 21623 168419 497010 512 32 11930 34728 1276891 133402 512 64 34536 26757 1045103 620694 512 128 11043 78253 971357 577155 512 256 26726 63546 437208 607353 512 512 29090 112112 725058 2089386 1024 4 6752 6821 285801 315254 1024 8 9173 17901 525069 325085 1024 16 18214 38664 1095150 916004 1024 32 23652 29206 753000 727244 1024 64 16715 42698 962391 1064479 1024 128 21412 47823 1162119 1119120 1024 256 39166 42243 889631 873705 1024 512 38849 67461 1790460 482103 2048 4 5442 9357 268874 267359 2048 8 9742 10594 527028 786493 2048 16 10918 23612 825494 338789 2048 32 23392 33622 927057 492293 2048 64 37418 21849 1318727 1115459 2048 128 27162 59284 428109 341673 2048 256 39640 62932 1029128 835287 2048 512 45858 50242 1573015 1323808 4096 4 6806 7666 214282 264192 4096 8 14175 16534 507757 549882 4096 16 17208 16819 583479 257481 4096 32 22575 30284 627144 830675 4096 64 25971 52949 902977 756129 4096 128 30391 38465 714702 791049 4096 256 33300 67353 681989 1112123 4096 512 33213 79366 658414 593006 8192 4 2755 6610 360449 399667 8192 8 7524 11338 415711 520761 8192 16 14535 15132 409191 305958 8192 32 28952 20546 662295 717025 8192 64 29626 31440 1202743 776494 8192 128 29889 42441 581985 430498 8192 256 34376 45275 899921 479597 8192 512 32209 54583 837188 465801 16384 4 6425 7455 351655 305238 16384 8 12346 12430 431360 297939 16384 16 16041 17533 622183 595588 16384 32 21723 31373 578535 562077 16384 64 26982 37637 503502 375022 16384 128 27429 32552 596389 666339 16384 256 32568 39946 747545 759895 16384 512 34779 62906 670487 426834 32768 4 5767 5959 207917 185053 32768 8 9811 9261 333109 228003 32768 16 14917 17555 543198 508701 32768 32 22765 25427 933188 392638