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: Tue Jun 23 09:24:22 2026 Auto Mode Machine = Linux oleg209-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-oleg209-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 1769 6566 359444 103252 64 8 1341 2331 811459 760859 64 16 1294 30577 929467 780776 64 32 2185 9929 1124074 15534 64 64 4432 36697 1232453 1828508 128 4 4501 9930 606082 502309 128 8 3574 3367 794416 656477 128 16 6637 13436 1076312 843068 128 32 6735 48137 1377278 976473 128 64 5393 34955 673778 1291158 128 128 2192 95736 1561553 1152564 256 4 6163 5227 213688 567875 256 8 3790 11806 494172 602276 256 16 9678 30415 1137672 980760 256 32 9884 19741 1084800 1185399 256 64 6906 40789 1190657 999940 256 128 5815 37170 463858 1016025 256 256 13793 73519 1332507 1829808 512 4 7605 7663 96804 275572 512 8 8667 5214 205288 367291 512 16 10124 28323 962218 68900 512 32 7174 11585 1113374 991998 512 64 12581 19798 1150351 949875 512 128 6521 22418 260559 1422357 512 256 7449 44505 1510391 1541840 512 512 18843 26357 557816 1696534 1024 4 7651 4822 174949 201975 1024 8 11648 10181 575285 414060 1024 16 18551 21710 176465 436888 1024 32 15354 22940 1235319 790707 1024 64 6930 22828 746976 328843 1024 128 31726 54320 712998 813933 1024 256 40335 28639 609491 375506 1024 512 19370 30351 1577984 855604 2048 4 4715 8843 302379 270508 2048 8 9610 6176 259900 285751 2048 16 10117 19271 1075650 519129 2048 32 20937 40835 1053487 329851 2048 64 31516 44237 748525 402738 2048 128 18730 37293 655579 332468 2048 256 30690 54842 626462 972503 2048 512 16639 45380 1039087 303909 4096 4 4262 5853 439250 126700 4096 8 7850 7080 430381 166808 4096 16 6298 26929 170396 272014 4096 32 10044 20498 577148 506679 4096 64 22615 20408 447744 513217 4096 128 17531 30869 1412376 363704 4096 256 39005 55119 722881 915731 4096 512 26483 44473 246880 345804 8192 4 5848 5696 288229 144497 8192 8 10503 10606 217942 269687 8192 16 22787 38479 492607 276459 8192 32 15557 21994 619386 869827 8192 64 22451 22790 230890 272885 8192 128 21220 20096 718795 377335 8192 256 28438 46699 813829 456888 8192 512 30862 42160 1268270 433436 16384 4 4083 8355 259548 259865 16384 8 9488 10075 406682 327451 16384 16 9909 11856 703481 623064 16384 32 15375 18088 330848 388162 16384 64 23564 34644 754986 823275 16384 128 24490 37854 802387 500977 16384 256 31881 36960 652100 538099 16384 512 24239 47058 763110 526938 32768 4 5240 5644 246451 192650 32768 8 6507 7917 303238 440773 32768 16