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 14:50:03 2026 Auto Mode Machine = Linux oleg255-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-oleg255-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 1597 10184 108117 484710 64 8 5817 20183 608965 532815 64 16 4781 28933 866463 983980 64 32 8696 59364 581273 695778 64 64 6783 75027 1066042 1143223 128 4 7233 12304 558771 667081 128 8 7012 24426 731625 150603 128 16 12720 31542 853794 556454 128 32 4784 24705 877518 718889 128 64 9316 67651 1196221 307696 128 128 6833 45421 992724 352553 256 4 6845 4153 118687 467900 256 8 6880 16483 185229 71789 256 16 17482 33420 397563 744204 256 32 8973 42398 1241598 930608 256 64 18690 20715 1036624 611189 256 128 21385 112236 1319408 1266495 256 256 19588 127419 808050 1588832 512 4 6389 7731 218622 253336 512 8 7393 8425 734733 812577 512 16 5845 35442 502005 413549 512 32 13803 40995 1078159 440165 512 64 21556 67708 1152822 654759 512 128 37580 76578 1248678 1184618 512 256 31385 86151 676414 910797 512 512 17853 95359 339104 572081 1024 4 10030 12780 127633 520109 1024 8 14998 21584 410616 471414 1024 16 25872 29073 931702 487410 1024 32 21381 54870 831744 694775 1024 64 34003 49706 827896 750238 1024 128 30751 64647 1391395 723082 1024 256 27753 62668 956178 613145 1024 512 33121 95416 894448 1426517 2048 4 5650 6507 204474 213177 2048 8 7995 8646 495045 211899 2048 16 11431 14758 518878 840353 2048 32 30792 28304 826129 297932 2048 64 25135 28160 1268110 433161 2048 128 20769 24208 782838 1148723 2048 256 33396 55376 1606254 1307885 2048 512 41300 65777 478739 630324 4096 4 7587 5912 419033 279894 4096 8 17533 16611 439576 353380 4096 16 12996 20286 603759 333824 4096 32 21651 37129 869611 367422 4096 64 31129 48357 721000 693637 4096 128 39546 39617 485652 786343 4096 256 37068 59324 1019951 1284494 4096 512 37435 58702 1505315 1104331 8192 4 8217 2011 400468 129358 8192 8 8679 9607 298269 210424 8192 16 13384 15533 472735 382408 8192 32 23598 37778 318556 415159 8192 64 29896 29389 637616 370880 8192 128 28419 32857 1043043 488579 8192 256 27708 44391 899921 551088 8192 512 28824 47390 1041304 613262 16384 4 4928 7247 268823 200636 16384 8 7386 9653 218034 180635 16384 16 11265 15244 257541 348720 16384 32 20977 26784 514784 502420 16384 64 25713 29862 278748 334312 16384 128 26610 25910 673767 852051 16384 256 32801 38441 934897 610634 16384 512 28203 44007 1296916 556654 32768 4 5341 5446 307003 324853 32768 8 8579 9843 434889 450054 32768 16