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 Apr 30 15:03:33 2026 Auto Mode Machine = Linux oleg333-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-oleg333-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 1892 7573 603489 263222 64 8 2420 11059 22192 645579 64 16 2643 20612 913649 615952 64 32 1751 37361 1188789 1017549 64 64 5294 75364 1143223 1780008 128 4 6189 5742 529038 400110 128 8 2685 3821 474349 166223 128 16 3866 9640 914904 542400 128 32 3979 55675 1076312 969421 128 64 5955 39251 154949 355589 128 128 11988 40737 1391557 1852520 256 4 6985 17763 735537 1040643 256 8 7534 17302 252716 742146 256 16 5131 11285 941213 1012194 256 32 7992 26711 1008392 50077 256 64 23013 72541 999940 318352 256 128 4722 15692 775373 1260547 256 256 7855 67122 433869 1430119 512 4 4555 4365 330748 388487 512 8 5733 14010 169482 712076 512 16 15755 9031 389050 139848 512 32 11244 31206 576535 1077618 512 64 11575 49388 758612 1218910 512 128 14823 87638 1446306 1454140 512 256 25508 63477 826971 831132 512 512 20485 51743 1753325 80238 1024 4 5008 3968 204348 127968 1024 8 5314 7967 308329 225803 1024 16 20141 25805 956178 131639 1024 32 23263 19027 574669 339528 1024 64 31162 81232 953418 839220 1024 128 18507 16496 829816 618710 1024 256 27218 55836 340200 711581 1024 512 13583 47837 826462 884319 2048 4 7743 6429 220544 157732 2048 8 6743 4832 135405 703815 2048 16 12552 19991 714826 284201 2048 32 12174 16405 1110699 616880 2048 64 22005 30615 152369 591072 2048 128 17001 22506 1422220 337219 2048 256 18175 24762 1470424 1273562 2048 512 34463 63321 251132 388617 4096 4 6543 11068 444259 194602 4096 8 7063 9955 299761 381980 4096 16 10832 19527 723673 431841 4096 32 21509 23258 582234 678033 4096 64 24364 39314 443731 795961 4096 128 30237 26017 181859 578781 4096 256 23790 35669 976861 966257 4096 512 33425 44433 861932 650166 8192 4 4281 4712 207987 135177 8192 8 7428 9800 297047 155844 8192 16 16821 15877 432476 515928 8192 32 17777 26669 675683 709929 8192 64 23620 28092 672088 595604 8192 128 28907 36257 348536 560135 8192 256 32731 50525 594615 449635 8192 512 31280 46243 296006 1437717 16384 4 5014 4683 191816 308184 16384 8 6251 8964 453172 348752 16384 16 12586 14574 420771 258578 16384 32 18050 21836 583269 606367 16384 64 25088 30348 561521 358998 16384 128 22609 33604 796426 444421 16384 256 35850 38167 351398 499023 16384 512 33462 53248 600564 337161 32768 4