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 Jun 27 21:12:51 2026 Auto Mode Machine = Linux oleg206-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-oleg206-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 3618 8133 520419 334788 64 8 2984 7887 831569 444572 64 16 1487 28056 780776 653436 64 32 7414 59469 1330167 969761 64 64 12237 22338 2467108 2203800 128 4 8323 14226 579270 226929 128 8 7687 5548 234871 450846 128 16 6424 30309 889145 859260 128 32 13857 44443 1684006 1142750 128 64 12802 81630 1196221 1243315 128 128 2565 63589 1359835 1705404 256 4 2551 6213 587127 255239 256 8 8306 7793 482189 425951 256 16 14509 32512 1237306 678807 256 32 15106 16750 1019886 825443 256 64 12072 134254 1112909 1058076 256 128 41802 121963 1278559 1306564 256 256 15893 112471 822913 2097948 512 4 8664 4856 541773 60066 512 8 11997 8532 331821 578554 512 16 9607 28395 917412 377559 512 32 10067 31358 927716 282273 512 64 11267 18552 1171691 997991 512 128 10002 132750 186513 624303 512 256 14466 35094 538918 757541 512 512 19332 46264 767559 310877 1024 4 4463 5425 114554 408468 1024 8 9516 5705 253902 398760 1024 16 16536 9129 756182 368609 1024 32 7452 24436 516606 1034232 1024 64 20643 16845 84705 909410 1024 128 12289 55688 1438461 728354 1024 256 35565 58017 569790 140699 1024 512 21886 80744 1563622 808265 2048 4 5011 4979 205437 164288 2048 8 7200 12715 514959 342081 2048 16 8675 12195 226397 482667 2048 32 9761 15994 1236708 766424 2048 64 16292 44132 866724 324456 2048 128 21232 31355 1065113 357991 2048 256 14062 56208 660672 709630 2048 512 22977 57141 978485 494191 4096 4 828 4277 271152 193620 4096 8 6493 8618 422797 331121 4096 16 9279 14518 743369 481717 4096 32 15794 24394 425868 631501 4096 64 14477 27811 1251100 418512 4096 128 21115 20681 312481 342509 4096 256 31359 38968 1208249 857244 4096 512 35530 55332 539504 1414352 8192 4 3904 3797 188581 137745 8192 8 6609 8157 401413 413988 8192 16 9606 11008 397627 450703 8192 32 17051 18449 627887 519368 8192 64 24321 24867 484589 413425 8192 128 17228 22920 630051 351119 8192 256 19899 32162 499670 360736 8192 512 26781 39690 1126039 737684 16384 4 4712 5572 188906 126363 16384 8 7544 10033 256055 220013 16384 16 7433 14852 416088 179642 16384 32 21092 23364 359156 240866 16384 64 17209 20553 862716 782202 16384 128 18096 37160 670160 596193 16384 256 25906 34673 396265 386451 16384 512 29577 36391 1052546 729414 32768 4