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: Wed Jan 21 23:13:42 2026 Auto Mode Machine = Linux oleg430-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-oleg430-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 3817 3489 93148 129316 64 8 5383 22008 103411 420873 64 16 5903 26371 566551 484710 64 32 2336 28830 763021 780776 64 64 5474 95944 877797 2561267 128 4 3026 6902 82750 251014 128 8 4126 18000 425141 752124 128 16 9215 44991 659704 628061 128 32 12331 77528 921183 707520 128 64 8716 64029 1162547 877518 128 128 9411 88391 592699 1778862 256 4 10300 12894 239684 91073 256 8 13875 27388 256274 254452 256 16 18856 39702 668662 476835 256 32 16538 72521 907792 814795 256 64 22503 94363 1040643 1040643 256 128 10705 84627 243103 396975 256 256 20195 41720 1280084 1581810 512 4 5680 7643 392033 69451 512 8 6438 8053 77977 413549 512 16 16861 41602 435789 87954 512 32 25664 15790 856319 289581 512 64 26614 66321 573303 934173 512 128 15506 51149 1350783 1252318 512 256 19895 27078 522018 1585086 512 512 10672 106470 90991 2089386 1024 4 4844 7258 88656 69921 1024 8 7347 8834 213958 141440 1024 16 12062 10748 647338 600291 1024 32 21132 64666 619156 210137 1024 64 30655 62610 861266 999107 1024 128 35189 51730 818587 1204825 1024 256 12249 103823 1512948 935151 1024 512 12904 31874 1783768 461486 2048 4 4174 3485 71993 76227 2048 8 4502 6175 118209 258353 2048 16 5914 9771 266844 225648 2048 32 13459 21263 248423 196414 2048 64 24567 17802 325600 141524 2048 128 31407 43080 804466 633251 2048 256 23366 45277 1552545 1359854 2048 512 14743 82487 1616531 195137 4096 4 9576 5902 82544 101310 4096 8 9004 6446 66312 69612 4096 16 10079 17922 325002 325057 4096 32 20675 27450 468004 404300 4096 64 13070 23152 466834 178707 4096 128 19383 34383 909622 515357 4096 256 36176 41218 388616 371618 4096 512 27275 53609 1051347 279839 8192 4 5868 6400 193984 166568 8192 8 12249 10884 274860 207077 8192 16 15175 19495 499147 298913 8192 32 23413 30502 472079 270978 8192 64 23482 36236 772618 886570 8192 128 26950 76776 655935 883038 8192 256 36361 46178 712225 1372862 8192 512 40143 90477 773714 566489 16384 4 5728 7611 149725 162554 16384 8 9810 9002 241232 190564 16384 16 10302 12069 136199 143898 16384 32 22532 17850 203525 232084 16384 64 21216 19537 208069 210935 16384 128 16281 28662 649437 511059 16384 256 26407 26075 386751 296082 16384 512 24125 31138 558550 195068 32768 4 5881 7454 115892 102921 32768 8