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 Jun 16 06:29:09 2026 Auto Mode Machine = Linux oleg149-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-oleg149-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 1268 6363 542506 537079 64 8 4201 10031 725882 725882 64 16 4218 32601 969761 866463 64 32 5019 45848 1279447 1101022 64 64 3955 48307 1255511 877797 128 4 1993 6203 652488 470606 128 8 2617 10098 870405 348661 128 16 5988 38439 1022989 436904 128 32 6541 28350 1133103 707520 128 64 3312 74124 1487977 1332828 128 128 2991 12015 343970 261148 256 4 6830 8158 630572 447615 256 8 8297 18014 817898 555248 256 16 6556 28378 477684 879535 256 32 11610 40868 430218 1058076 256 64 6880 57205 1384034 1180188 256 128 12310 46876 699139 1024752 256 256 14499 30754 1673001 2097948 512 4 5636 4558 578399 91042 512 8 11923 9823 770037 706221 512 16 4991 15315 934173 705294 512 32 11893 40416 1187895 912733 512 64 22644 43903 1147892 1210664 512 128 23063 48265 1580419 1187895 512 256 14646 19961 165703 1471074 512 512 20059 45018 1772135 197910 1024 4 5446 5725 630148 489912 1024 8 6043 15413 801179 201341 1024 16 18220 28568 877454 577606 1024 32 28860 43848 1643814 884319 1024 64 43710 53584 365690 917570 1024 128 28222 60359 1113030 440247 1024 256 30052 59882 1102176 678209 1024 512 22201 48411 223780 733579 2048 4 3809 6794 233683 294087 2048 8 5067 6451 437151 836915 2048 16 15027 14524 762207 508586 2048 32 13420 18496 1250389 467586 2048 64 17933 20916 892386 845232 2048 128 13639 31693 1551704 1103564 2048 256 15933 23680 1510236 462202 2048 512 29925 28874 91895 149752 4096 4 4008 4549 409758 398754 4096 8 9676 8263 306063 375879 4096 16 12140 22062 490659 528581 4096 32 29919 29631 596568 259225 4096 64 28781 41118 1462763 311931 4096 128 34154 51363 704734 478563 4096 256 32406 56684 679158 663115 4096 512 38879 77564 1606825 614910 8192 4 1614 5956 453523 389112 8192 8 11592 12908 551354 341589 8192 16 16503 17569 489365 204794 8192 32 16823 23035 305124 308957 8192 64 48511 35519 861603 585097 8192 128 27763 41673 698797 343783 8192 256 26946 64921 883515 568297 8192 512 33170 59831 590923 628415 16384 4 4200 5441 212779 205779 16384 8 9975 10965 528636 377026 16384 16 15650 14426 462328 650624 16384 32 16066 22948 977617 416313 16384 64 21682 50305 1032198 570907 16384 128 36742 40463 505584 959142 16384 256 35581 52923 1415705 585854 16384 512 31337 49224 547797 787536 32768 4 5140 7395 306245 307354 32768 8 10090 10822 266825 386515 32768 16 9980 12861 635198 477701 32768 32