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: Tue Sep 8 19:15:05 2026 Auto Mode Machine = Linux oleg344-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-oleg344-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 4694 19120 566551 591520 64 8 8038 25050 889431 438043 64 16 8163 46076 801764 653436 64 32 7130 50036 1330167 460591 64 64 6489 50355 1255511 1679761 128 4 6616 17367 529038 465304 128 8 8841 30397 877518 831319 128 16 7871 42424 628061 1065630 128 32 7513 64841 1332828 1114289 128 64 12653 77428 1111981 481582 128 128 12338 91822 1561553 2202044 256 4 6837 14648 580775 746272 256 8 10523 16891 808050 723153 256 16 11792 47688 992545 999940 256 32 14425 59231 941213 937924 256 64 15388 76900 1398455 958864 256 128 27282 85852 1662639 275614 256 256 17510 83037 209151 1985448 512 4 12482 17357 555938 409605 512 8 20157 23607 790153 536628 512 16 14530 52980 1145443 813808 512 32 19702 52496 823167 1015932 512 64 13249 47868 1566585 249509 512 128 23152 95844 1372364 1413929 512 256 21964 81360 2287463 434642 512 512 16364 52438 1695195 2327124 1024 4 12401 13708 416106 317046 1024 8 16647 26451 515862 466094 1024 16 18926 44823 1089317 529145 1024 32 33794 54950 889631 428263 1024 64 37537 89042 1309518 764799 1024 128 47365 125938 1264413 1460969 1024 256 47661 58095 1861867 2333199 1024 512 31873 109846 1146607 1311117 2048 4 12274 16797 643643 521905 2048 8 20903 20667 480534 1035829 2048 16 36105 53178 1295263 1024953 2048 32 40892 61723 1293702 1193576 2048 64 47664 93644 1307885 769031 2048 128 40405 89950 1350872 1446164 2048 256 64158 94001 1320552 269658 2048 512 53868 71685 1291951 1302925 4096 4 14631 15083 710740 403465 4096 8 23425 29254 851381 582392 4096 16 37209 47192 826837 475346 4096 32 49643 74197 1233051 799219 4096 64 44578 91625 1739944 1330658 4096 128 67840 86336 1820324 1568822 4096 256 72408 87502 1821289 1401773 4096 512 83264 101708 1271188 1564536 8192 4 15932 18402 588424 509608 8192 8 27024 28497 890914 801714 8192 16 36927 41500 600770 603991 8192 32 41597 63077 993319 795202 8192 64 58750 80863 1235037 1478677 8192 128 61838 87565 1280989 1238599 8192 256 52914 94110 907911 1356762 8192 512 70842 106908 1729330 1691864 16384 4 16583 16314 626614 536406 16384 8 24436 29914 1051660 720429 16384 16 42326 46225 1047763 895393 16384 32 53757 63954 1326968 1154778 16384 64 63305 79141 1251178 1148717 16384 128 54392 83747 1369110 1141655 16384 256 64887 91863 1765124 1588529 16384 512 84491 100556 1876104 664124 32768 4