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 Sep 5 16:13:18 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 4735 4990 504762 598110 64 8 6368 31084 889431 524487 64 16 3805 13095 1105556 780776 64 32 3844 68238 1138375 681644 64 64 8241 50793 1452528 1492919 128 4 6680 5552 595328 69788 128 8 3182 5270 767171 700139 128 16 6980 14299 227410 490380 128 32 5470 44535 1142750 494444 128 64 9891 63431 901083 1123617 128 128 13519 77294 1377278 1827299 256 4 4134 7154 342195 280731 256 8 9151 7314 847597 744204 256 16 13651 21218 891956 496228 256 32 15306 28923 1032636 203830 256 64 12066 80455 622890 1152323 256 128 18703 111931 1219045 1128110 256 256 13085 142693 1572543 1778290 512 4 3625 10562 529483 266245 512 8 5691 6795 758612 738777 512 16 10126 28027 588544 766464 512 32 26926 20811 1125630 576690 512 64 24373 41762 1222379 1015451 512 128 25924 36115 710192 1293037 512 256 21778 58076 911184 549818 512 512 42164 42147 922535 1293037 1024 4 6746 4712 562624 241401 1024 8 16629 12615 820620 369529 1024 16 18488 17156 756848 80782 1024 32 11058 33064 1027060 916590 1024 64 35570 26485 1298041 1070048 1024 128 36247 40745 1259592 363401 1024 256 34945 55408 948157 864038 1024 512 16413 64658 864038 1041758 2048 4 7421 5819 131022 128216 2048 8 8110 9210 538357 696623 2048 16 9647 18346 311581 438355 2048 32 15611 36739 1102856 663684 2048 64 33773 29041 1306890 512776 2048 128 25653 37756 872978 761329 2048 256 31988 40799 1477506 1325442 2048 512 21088 52432 492293 280160 4096 4 4881 5791 399301 316861 4096 8 10294 8292 184371 204036 4096 16 14759 23540 232289 222198 4096 32 23276 1449 687832 234390 4096 64 16147 17332 296318 518734 4096 128 17601 32772 889834 396783 4096 256 22714 41076 362224 755996 4096 512 25360 35726 348357 234310 8192 4 5691 5005 268607 394093 8192 8 7319 10607 436603 203330 8192 16 12608 14744 169148 226003 8192 32 17875 30168 698073 401235 8192 64 21722 36166 580579 486752 8192 128 27918 43319 632056 433967 8192 256 30170 50356 516914 480974 8192 512 29370 41625 1011836 504520 16384 4 6016 5503 246754 168881 16384 8 7452 11233 291188 268722 16384 16 16358 15951 428811 504230 16384 32 20635 21739 524084 488464 16384 64 23773 35244 975701 487926 16384 128 31561 39131 568160 324217 16384 256 40404 46021 727954 857805 16384 512 29682 52533 1101895 874095 32768 4 4398 5695 430072 262467 32768 8