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 Oct 23 12:50:57 2025 Auto Mode Machine = Linux oleg655-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-oleg655-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 3635 20265 275939 262193 64 8 8646 5723 407457 435202 64 16 14628 45553 666414 620221 64 32 6992 76743 780776 789967 64 64 9439 96358 863676 1363961 128 4 11608 16509 240986 236631 128 8 16810 32686 377332 157449 128 16 6263 27124 621518 549056 128 32 9988 80759 1074159 780556 128 64 24834 75257 776042 485063 128 128 17395 114500 1579934 1487977 256 4 4928 7863 246621 250944 256 8 11441 9407 434571 469743 256 16 25916 58235 660030 536654 256 32 19180 86114 526652 859127 256 64 23704 114133 1019886 697322 256 128 40698 61969 1422540 1312954 256 256 52881 98203 1570244 2170027 512 4 15172 17530 167043 184971 512 8 11806 32806 449941 277208 512 16 35892 56030 572691 382672 512 32 50532 81114 605299 785528 512 64 53900 114723 954944 1087440 512 128 63200 136932 1354190 461248 512 256 32732 91887 1599251 1150968 512 512 54236 182395 1624659 1862832 1024 4 8572 6431 216722 316742 1024 8 14012 12803 394910 389679 1024 16 31236 58056 690530 275799 1024 32 13498 55776 638770 145578 1024 64 27021 65326 173094 977950 1024 128 55743 131502 1197435 1244266 1024 256 70112 74755 1570483 1314729 1024 512 54729 127315 933322 1065535 2048 4 10965 13278 267259 267993 2048 8 19130 19223 361897 305498 2048 16 24519 38510 701344 605188 2048 32 29797 58651 945007 805371 2048 64 23555 43784 1218291 1071624 2048 128 50807 53577 287675 811687 2048 256 32983 87412 1114880 449527 2048 512 48830 68515 1607456 748525 4096 4 9789 9562 125390 150798 4096 8 13840 17981 144663 312413 4096 16 27196 31636 457705 561877 4096 32 29249 43699 922517 530573 4096 64 41089 50706 1097278 809996 4096 128 46155 71969 900988 986226 4096 256 50178 79356 1413421 889282 4096 512 64422 59937 904212 1387957 8192 4 11292 11088 163086 199154 8192 8 16581 19326 250067 304510 8192 16 19446 2807 719669 289672 8192 32 34116 43600 726485 562907 8192 64 34170 63104 818541 265353 8192 128 34083 62274 844368 1215077 8192 256 55479 68513 785422 494870 8192 512 42499 44583 1540739 664819 16384 4 8355 9156 127099 186132 16384 8 14580 15866 306507 393684 16384 16 25752 25011 285864 411896 16384 32 25440 45141 528872 579408 16384 64 37232 45754 453888 940463 16384 128 31347 49689 884047 1116540 16384 256 36900 49805 1060734 919880 16384 512 52058 61241 1126367 1103895 32768 4 11055 10986 274165 244977 32768 8 13678 17243 212409 273064 32768 16 21524 26562 313815 300119 32768 32 26762 35592 312605 294858 32768 64 33036 46046 1027213 526764 32768 128 48407 59861 886892 1075912 32768 256 59234 65270 1372018 556059 32768 512 60820 63002 1339876 541296 65536 4