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: Mon Mar 2 11:49:59 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 1239 2884 447537 542506 64 8 1476 25217 1017549 735831 64 16 4090 23961 621657 1204796 64 32 4774 24738 1310683 401966 64 64 5259 72397 113464 1828508 128 4 4218 5276 711270 224932 128 8 4451 10378 908709 318465 128 16 3475 42384 150223 739689 128 32 5088 40263 805138 1152564 128 64 13022 71346 1471662 1471662 128 128 8470 21437 1705404 1939522 256 4 3485 5685 985259 807442 256 8 7618 5660 898674 577962 256 16 4462 12622 2015259 999940 256 32 16318 82022 1334162 1158540 256 64 15574 68174 988889 1262029 256 128 11656 17561 1579483 1312954 256 256 14010 64208 624339 2266207 512 4 7404 4681 601063 453840 512 8 10531 6692 500018 690108 512 16 5558 21030 1778004 1347393 512 32 20781 44923 515626 1143004 512 64 16552 44762 1075459 1276891 512 128 19823 61962 705989 1322500 512 256 22957 49430 1585086 636705 512 512 24589 115781 1365383 1361920 1024 4 2467 3299 115730 197335 1024 8 7952 4815 159700 242532 1024 16 5290 7329 683606 295373 1024 32 8333 21519 924283 945443 1024 64 22495 34987 2043465 833196 1024 128 20533 65443 1083546 1852232 1024 256 28771 65107 1947119 1517224 1024 512 28091 47958 967813 1078919 2048 4 9262 3584 164127 185120 2048 8 6569 8387 135556 865588 2048 16 7953 7119 133150 350870 2048 32 9964 20250 1065510 982289 2048 64 15050 21944 473880 455631 2048 128 14153 21494 357976 193480 2048 256 12570 22991 277768 958825 2048 512 21158 46024 1005399 1510236 4096 4 8084 6059 360976 270754 4096 8 8679 8055 296256 283815 4096 16 13740 17701 270005 280182 4096 32 15765 17520 706066 673250 4096 64 24587 40405 619768 618920 4096 128 32040 43742 946820 1335104 4096 256 43809 47724 588174 994677 4096 512 24908 42509 478110 542297 8192 4 5988 3744 313341 220601 8192 8 7939 7130 381466 644275 8192 16 11052 13649 704875 636812 8192 32 15775 17844 783327 895209 8192 64 38719 30776 828408 367402 8192 128 20703 57334 695712 1393462 8192 256 39540 40340 604044 613306 8192 512 25457 31494 426559 205689 16384 4 6317 4530 142860 343516 16384 8 13570 9083 310074 721928 16384 16 16325 24926 534932 304648 16384 32 15391 13626 260360 238531 16384 64 13937 22462 294426 475242 16384 128 17875 28092 347170 434186 16384 256 27682 33621 795301 600501 16384 512 25941 29309 1055131 358762 32768 4 3943 4475 177618 287903 32768 8