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 Aug 18 01:56:17 2026 Auto Mode Machine = Linux oleg321-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-oleg321-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 1403 7873 542506 500060 64 8 5130 15455 610350 789967 64 16 2693 31051 752329 640954 64 32 3591 26868 1087638 889431 64 64 5126 11011 1210227 1163036 128 4 4300 11491 603357 383258 128 8 8214 10569 649331 620799 128 16 4809 31387 127862 465304 128 32 3593 72239 1175271 193063 128 64 6398 88464 1024942 1373754 128 128 4558 31715 1561553 1778862 256 4 7515 9351 335564 481109 256 8 3269 5861 296629 215662 256 16 7735 24662 750445 393772 256 32 22629 9963 112330 969251 256 64 7007 32245 192364 1213534 256 128 24292 63303 1718521 1532153 256 256 7797 67813 703260 2131261 512 4 4417 6124 408592 266377 512 8 8115 11914 636139 675350 512 16 19318 21354 1179413 592604 512 32 12885 37500 1195832 1120344 512 64 16377 27544 749608 829847 512 128 12104 63871 1667552 1454140 512 256 28511 75784 552932 1488408 512 512 40728 86985 1514652 1977778 1024 4 5677 2966 250613 107665 1024 8 6111 13053 625923 722595 1024 16 17248 26512 414940 518978 1024 32 18125 20096 674058 377188 1024 64 14371 23151 758586 607680 1024 128 23067 21376 552279 432619 1024 256 18243 37799 151189 977060 1024 512 19730 85177 1535119 248856 2048 4 3152 5212 108102 136515 2048 8 7382 6410 360183 291779 2048 16 17751 25149 684249 318714 2048 32 13238 13756 605231 492180 2048 64 12357 16210 197757 242538 2048 128 13987 25580 462500 533046 2048 256 17331 31519 1485169 222538 2048 512 26238 30432 186369 1360931 4096 4 1211 6007 250688 159105 4096 8 5552 11787 295655 233575 4096 16 14918 12796 782867 607453 4096 32 19806 25672 1359833 385399 4096 64 22501 34716 968054 463771 4096 128 16459 46309 934511 1209270 4096 256 24081 42051 591068 367878 4096 512 44893 106149 354503 414824 8192 4 5253 5552 411928 232999 8192 8 9523 9132 312970 181996 8192 16 11590 19864 567312 745543 8192 32 23399 23741 621178 573945 8192 64 23624 26979 529647 523387 8192 128 22310 39582 546530 447335 8192 256 21775 31996 934963 1001834 8192 512 35673 43560 1012969 881611 16384 4 5938 6131 281473 221345 16384 8 11838 13543 404742 256521 16384 16 16365 19778 287257 389798 16384 32 24481 22701 610797 658126 16384 64 30250 33686 648200 1105386 16384 128 26125 49542 622375 700205 16384 256 27307 45580 546843 714868 16384 512 32224 41113 701814 317556 32768 4 5517 5640 317765 286666 32768 8