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 Sep 9 04:23:35 2026 Auto Mode Machine = Linux oleg320-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-oleg320-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 2305 6658 621657 610350 64 8 3396 26016 754443 674790 64 16 2688 38719 1087638 666414 64 32 4292 32322 1143223 254971 64 64 2381 62736 1679761 1828508 128 4 2827 10566 468962 226164 128 8 6015 4538 907174 542400 128 16 7820 18294 1074159 895074 128 32 4101 18181 1332828 841746 128 64 7825 33290 55360 1196221 128 128 3771 21839 1391557 739689 256 4 2833 8006 520272 311427 256 8 5120 16300 652807 492134 256 16 5227 14438 937106 33582 256 32 5548 43753 1173737 1016025 256 64 10049 45853 1384034 1332507 256 128 8957 30787 1168627 425951 256 256 13686 58365 1662639 2000242 512 4 4499 3492 440256 526240 512 8 6051 13702 796306 382127 512 16 9763 22054 608903 869143 512 32 17241 20626 1123275 847532 512 64 12192 43712 1233614 425260 512 128 14288 67493 382399 552221 512 256 15934 24024 717069 1091863 512 512 19422 51097 1764853 1064266 1024 4 6848 5149 116950 421910 1024 8 5517 11268 414419 442332 1024 16 20675 38284 958098 455129 1024 32 8753 18094 1251882 612446 1024 64 15989 52437 1286378 1038483 1024 128 31232 52881 687766 578851 1024 256 31626 74338 1528563 1153381 1024 512 37900 96196 1668074 583412 2048 4 5788 6002 633859 307422 2048 8 14170 11108 199497 810386 2048 16 19281 21994 398608 448916 2048 32 14702 16563 1314489 277024 2048 64 18334 23020 833261 626325 2048 128 19729 43105 862979 579508 2048 256 37149 43370 941176 698947 2048 512 21905 38109 893499 1531781 4096 4 4985 4572 211658 309928 4096 8 12438 9075 494928 217720 4096 16 12146 13455 421697 480356 4096 32 13177 15582 844891 398015 4096 64 16683 18408 801718 239711 4096 128 17290 27807 616587 280319 4096 256 32046 38640 811718 422267 4096 512 36606 28119 547603 504862 8192 4 1743 5700 293990 235091 8192 8 10060 8774 322049 253811 8192 16 19710 18552 550876 376971 8192 32 16847 21869 473686 586185 8192 64 24293 35021 822814 594955 8192 128 27359 26864 642708 482588 8192 256 28945 48210 259281 341915 8192 512 31150 27734 822814 752598 16384 4 5338 5611 238927 281661 16384 8 7714 10378 314386 300965 16384 16 12155 13639 346686 509895 16384 32 13303 20698 454404 309622 16384 64 17113 25459 817769 401586 16384 128 20696 22609 512530 653296 16384 256 26326 36094 469053 400704 16384 512 30282 48694 865552 470398 32768 4 5449 4791 197859 188195 32768 8 7994 11449 525372 316562 32768 16