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: Sat Aug 22 19:20:15 2026 Auto Mode Machine = Linux oleg317-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-oleg317-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 2264 6317 538156 13579 64 8 1806 13125 852702 688639 64 16 3134 24251 863676 1049372 64 32 4310 16869 1279447 760859 64 64 5486 38250 1124074 901377 128 4 4950 4145 609522 656477 128 8 3998 26710 330625 692017 128 16 4643 12765 1243315 1065630 128 32 10730 40479 1294270 428193 128 64 4149 99923 1319723 1346196 128 128 6672 122021 1543594 2098744 256 4 6715 10397 695516 559005 256 8 7614 26079 883152 695966 256 16 5258 9613 395659 941213 256 32 13384 37830 1321031 992545 256 64 21152 46964 1447470 1306564 256 128 18015 44443 675391 521536 256 256 17979 55542 1752173 1237306 512 4 8204 8300 191486 178900 512 8 6310 11178 881269 460852 512 16 9452 27369 1199171 1034530 512 32 25196 51082 958781 733478 512 64 30810 66545 489979 1309596 512 128 14066 23958 206452 1410215 512 256 11657 55549 1560891 1642050 512 512 15518 38673 1712772 957072 1024 4 6399 7849 634805 231262 1024 8 18222 16180 859714 319000 1024 16 23481 34867 886692 489465 1024 32 22881 66299 936987 866304 1024 64 26875 42636 1029029 506433 1024 128 26545 37457 1570483 740536 1024 256 23635 54151 1238168 1424152 1024 512 44570 64277 476065 1607514 2048 4 9824 12549 302294 301975 2048 8 13234 11437 912676 212538 2048 16 21030 32986 739313 558193 2048 32 17484 31621 461556 434717 2048 64 30121 42207 1031228 1287304 2048 128 44966 71713 400859 1336787 2048 256 33221 76363 1729816 763834 2048 512 32068 76212 451488 731194 4096 4 6831 8342 187253 109995 4096 8 11795 10323 423840 473029 4096 16 17113 24919 1227062 576084 4096 32 18433 37840 1017113 743626 4096 64 32721 1689 1567534 1338954 4096 128 27752 78440 1612557 1387509 4096 256 33883 47935 655249 609889 4096 512 28913 70025 755165 402472 8192 4 7491 7880 191143 231340 8192 8 10285 12166 481938 355294 8192 16 13626 18146 853704 595346 8192 32 22720 31010 651199 369774 8192 64 28325 44612 618038 327142 8192 128 48926 68415 793109 716084 8192 256 30783 48586 1144759 821162 8192 512 29801 43686 1205613 682434 16384 4 6493 6902 375022 339094 16384 8 13801 13400 644733 301198 16384 16 16190 21591 756207 570334 16384 32 31595 33097 713651 362213 16384 64 28567 34078 457282 433586 16384 128 29389 46290 595459 553026 16384 256 28936 39922 865552 768220 16384 512 36227 52070 847156 871346 32768 4 6705 6144 255738 391441 32768 8 12586 12988 320469 351980 32768 16 17854 24741 854821 442248 32768 32 28180 32344 860484 588264 32768 64 32578 37245 653814 636074 32768 128