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 18 21:50:06 2026 Auto Mode Machine = Linux oleg145-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-oleg145-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 1527 4889 233664 496362 64 8 3367 20888 727850 666414 64 16 5185 38647 901377 200055 64 32 3686 34745 1066042 504762 64 64 4319 29226 1124074 3057153 128 4 4745 17718 659704 819893 128 8 7442 9026 824932 841746 128 16 8586 16084 358438 627328 128 32 5516 26616 1243315 962469 128 64 5598 38833 1155043 1220700 128 128 8649 115312 275770 447464 256 4 5703 9848 606700 543445 256 8 10191 14701 770920 399932 256 16 10119 24240 567575 826078 256 32 12481 38437 1190657 341868 256 64 13642 53612 1243036 1219045 256 128 14621 32449 1479379 622890 256 256 13873 47540 1497953 2030503 512 4 7221 5220 338623 120816 512 8 11821 14137 510964 806171 512 16 7389 11513 812577 487089 512 32 12164 12648 1279935 589999 512 64 11055 21856 1488408 457124 512 128 11099 36253 1414860 563820 512 256 21373 52718 1625889 1546280 512 512 29922 89684 1759070 2047551 1024 4 7151 9343 263789 145209 1024 8 5496 10079 286755 808113 1024 16 10029 20403 761950 1078919 1024 32 18166 39995 810095 685789 1024 64 31152 21982 216678 141534 1024 128 10373 21906 1393200 1159609 1024 256 24605 74537 622927 218198 1024 512 34783 47834 728231 269618 2048 4 5652 7213 195177 332571 2048 8 10545 12993 333760 167527 2048 16 20401 29688 352670 268806 2048 32 14127 16262 511098 529726 2048 64 27857 18020 268554 154986 2048 128 19611 37489 293033 660672 2048 256 37082 28520 1422220 749897 2048 512 28287 40655 377848 444733 4096 4 4826 3589 224682 115790 4096 8 5491 6299 364801 198228 4096 16 11289 29506 595699 541647 4096 32 7830 25227 281048 1096927 4096 64 24776 35195 620238 701253 4096 128 20117 24391 439531 784368 4096 256 36174 32332 519738 820519 4096 512 28399 62183 341991 745951 8192 4 6259 1629 300137 164720 8192 8 8804 8536 170619 222113 8192 16 10127 7848 315392 513991 8192 32 13125 11248 315743 325725 8192 64 9653 24159 631998 586395 8192 128 22661 25131 800463 548546 8192 256 22087 22596 280751 716891 8192 512 23147 26903 596266 224813 16384 4 3306 6545 149014 107067 16384 8 8885 9717 589139 244785 16384 16 13548 17026 622753 745510 16384 32 14513 21979 529867 380050 16384 64 21048 32660 509675 382446 16384 128 21218 23447 548383 489689 16384 256 23870 28699 461716 581182 16384 512 29211 46599 663829 413455 32768 4 6069 5675 161805 281485 32768 8 8499 11007 242905 160065 32768 16