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: Fri Sep 4 07:25:59 2026 Auto Mode Machine = Linux oleg225-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-oleg225-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 2055 8177 200653 537079 64 8 4521 9534 801764 710511 64 16 5110 30189 913649 771797 64 32 5683 50755 1033216 998622 64 64 6226 75386 1105556 1679761 128 4 6171 13083 677178 533241 128 8 7957 22091 715059 785122 128 16 9607 35744 978253 1000121 128 32 10033 49363 1269781 524387 128 64 10132 59786 1391557 606767 128 128 8408 80953 1642783 1939522 256 4 8654 10113 639967 345054 256 8 11668 18118 775373 679237 256 16 5595 27251 1185399 907792 256 32 7603 35990 988889 208299 256 64 8400 32811 1362952 1319408 256 128 10316 50593 1570244 1642294 256 256 4421 36957 1790149 1894373 512 4 5081 4604 792486 714207 512 8 12596 9158 743123 708084 512 16 14338 19903 881269 885631 512 32 9537 14515 1185272 209494 512 64 6600 51122 1365383 1148506 512 128 23948 75493 1442420 846197 512 256 26001 49288 631277 584380 512 512 11829 34397 1815584 318579 1024 4 5469 7129 161514 131080 1024 8 17011 27146 785213 257356 1024 16 21665 24098 1085737 619067 1024 32 21402 44812 1032244 1115342 1024 64 26564 53291 833196 756315 1024 128 36364 43923 1053512 1206178 1024 256 46168 45355 1592612 440021 1024 512 36576 64568 1519371 1996910 2048 4 10118 9356 311717 318407 2048 8 15384 22263 1000480 461457 2048 16 12215 18216 638761 451702 2048 32 35514 44090 1219848 464074 2048 64 34728 53472 1693997 603064 2048 128 45094 66562 702089 620265 2048 256 56239 76845 1113723 863066 2048 512 46043 66703 287396 968337 4096 4 4495 6456 375198 238014 4096 8 9641 9655 199337 110966 4096 16 14389 28276 445561 596216 4096 32 28762 36904 1279615 465720 4096 64 24541 43239 784082 602172 4096 128 47442 56089 613812 665143 4096 256 43338 73054 1668465 1445775 4096 512 59129 80938 1666362 1520503 8192 4 5258 8897 273615 250045 8192 8 9975 9621 521583 444321 8192 16 15302 20633 780339 584102 8192 32 22668 26954 540580 283763 8192 64 24990 31689 456760 426777 8192 128 39446 3557 1118670 1231717 8192 256 31611 39314 626730 425024 8192 512 21898 32003 686387 619710 16384 4 4115 4561 153818 121090 16384 8 8508 9140 367684 220063 16384 16 11356 14745 247011 373636 16384 32 15140 19241 269176 233906 16384 64 24479 36796 629548 545458 16384 128 36056 40453 914688 508679 16384 256 27075 56612 743984 451300 16384 512 35642 48803 953393 889701 32768 4 5688 5644 290028 329963 32768 8 9213 9645 330242 278788 32768 16 15607 18624 319824 393880 32768 32 20143 25312 217568 258455 32768 64 21012 30593 956391 611936 32768 128