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 Sep 6 23:58:21 2026 Auto Mode Machine = Linux oleg121-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-oleg121-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 1622 11365 659861 551422 64 8 5386 4538 374488 254971 64 16 6130 36261 481234 863676 64 32 5223 27803 1105556 1029254 64 64 8271 58029 363337 1392258 128 4 4541 2275 620799 296973 128 8 4537 4395 848397 743788 128 16 4169 37858 1032829 549618 128 32 8885 41064 1123617 468962 128 64 3277 35351 1294270 1196221 128 128 5153 98313 1858934 37678 256 4 2902 5874 576720 286040 256 8 3200 7985 775933 414123 256 16 5348 14591 555248 324510 256 32 10284 74226 1361224 1206714 256 64 23054 73645 1415041 1230218 256 128 23402 133403 1334162 1398455 256 256 27254 149010 1579483 2065659 512 4 11437 10489 341531 84597 512 8 14365 18360 324060 608730 512 16 12451 21965 1001715 470959 512 32 27735 65364 1426135 546321 512 64 24525 77681 1329871 851903 512 128 35739 82421 1143004 1406520 512 256 11043 48608 1723770 1869318 512 512 39306 158957 1677976 2304647 1024 4 6239 9547 605538 224905 1024 8 9810 5870 462082 727737 1024 16 7079 6324 343630 761410 1024 32 20504 36917 893517 331816 1024 64 19138 19485 679927 1206178 1024 128 15708 70401 1456510 1349004 1024 256 49435 62147 1039489 960454 1024 512 19375 45139 1701108 1608116 2048 4 10017 9266 488208 658494 2048 8 11667 12910 434739 383174 2048 16 10236 20212 663427 1020448 2048 32 24533 40866 623823 1243511 2048 64 37837 59310 874845 537078 2048 128 32054 67586 791932 1363523 2048 256 43543 81205 1059464 541650 2048 512 33485 77207 2124745 1460673 4096 4 6373 9138 444064 351076 4096 8 9716 15617 589708 361896 4096 16 1466 24591 798105 662885 4096 32 25571 37358 591393 517827 4096 64 24561 33114 449913 766622 4096 128 34642 48745 612368 491488 4096 256 26671 38747 1766421 963331 4096 512 30269 27453 836092 560247 8192 4 6030 5641 198940 194551 8192 8 7062 9893 457040 214084 8192 16 14994 18994 532017 405727 8192 32 19879 25467 255387 424106 8192 64 28748 33781 383788 388360 8192 128 27309 39648 614930 659536 8192 256 42778 46925 1059217 760696 8192 512 39040 53187 1523523 830330 16384 4 6822 6287 212183 155633 16384 8 11123 8608 515251 391923 16384 16 13543 17234 571610 500135 16384 32 19655 30225 622798 517548 16384 64 25654 34526 847553 650833 16384 128 30328 39200 1048371 783513 16384 256 34281 45256 606094 675158 16384 512 37050 46753 989313 499971 32768 4 5437 6535 441588 346447 32768 8 9758 14552 698486 562645 32768 16