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: Sun Jun 7 13:19:47 2026 Auto Mode Machine = Linux oleg358-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-oleg358-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 4162 7958 212570 256188 64 8 1312 9396 402569 361380 64 16 4011 15578 780776 603489 64 32 2477 32700 1285575 743988 64 64 3362 37644 1562436 1648808 128 4 6092 8828 677178 434078 128 8 4520 10182 706589 73354 128 16 6846 12198 921183 335166 128 32 7220 42724 1165070 1000121 128 64 4548 9702 992724 1152564 128 128 10560 47940 969421 1451764 256 4 6243 12595 387379 525621 256 8 7351 7811 701422 461267 256 16 10469 10445 1007446 115322 256 32 10709 28104 1036624 566377 256 64 17468 53145 1168627 1226004 256 128 7614 29071 1163562 1415041 256 256 10269 62529 861885 2065659 512 4 4944 7327 440617 369122 512 8 3718 9186 929322 666753 512 16 7949 13117 1110496 702295 512 32 13678 39875 984720 1011625 512 64 24715 64908 1293037 534491 512 128 19211 79193 1426135 1463057 512 256 22071 44572 1446306 1683237 512 512 9149 31984 1753325 1977778 1024 4 6502 11048 416590 292317 1024 8 9856 18134 718605 685351 1024 16 19499 8917 983548 829015 1024 32 20530 32750 856115 999107 1024 64 23029 27451 779796 799985 1024 128 26283 25145 1321607 411245 1024 256 26549 65007 511500 725770 1024 512 19264 83178 435736 1587315 2048 4 4753 2704 255168 155894 2048 8 8189 25092 631714 343503 2048 16 24836 24834 267192 939940 2048 32 31641 34272 589894 484491 2048 64 30280 36719 781058 534439 2048 128 26219 48693 654530 1226291 2048 256 22907 30610 1592555 259015 2048 512 21207 47797 782268 503194 4096 4 6218 4848 117735 126945 4096 8 6526 6391 233629 319377 4096 16 18322 16642 358318 281878 4096 32 17404 21473 352553 503560 4096 64 38510 39053 202892 227088 4096 128 42318 31488 286656 552162 4096 256 37131 66603 515945 752816 4096 512 49143 50539 1617719 483139 8192 4 6214 2550 387659 436764 8192 8 10800 18529 622021 447626 8192 16 17307 29294 803533 920239 8192 32 24863 24238 583062 415309 8192 64 26001 57933 441404 769779 8192 128 24071 34195 477392 476254 8192 256 25145 34549 603333 551124 8192 512 46042 56908 1455809 854129 16384 4 5176 8629 311543 240097 16384 8 8609 11261 588312 441903 16384 16 15271 21918 453549 409652 16384 32 14360 22366 298875 683838 16384 64 18303 26563 839990 435327 16384 128 34889 28808 838105 680992 16384 256 38749 42087 720338 597889 16384 512 25493 37095 1651640 766857 32768 4 6560 5188 407572 325289 32768 8 8469 8987 989404 705296 32768 16 8974 16677 345832 258499 32768 32 17851 19734 635136 623784 32768 64