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 Jun 12 10:02:14 2026 Auto Mode Machine = Linux oleg236-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-oleg236-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 1970 3553 581273 500060 64 8 3022 24472 818885 673098 64 16 4980 32114 1066042 874936 64 32 4722 10529 1255511 1029254 64 64 4767 54056 1279447 1232453 128 4 2894 10126 354415 576780 128 8 3283 12271 883293 215887 128 16 8598 31848 1229084 927549 128 32 9151 43067 531131 1165070 128 64 9072 42174 1040839 1165070 128 128 7886 64645 435487 1778862 256 4 1877 4857 580461 557554 256 8 7316 15030 785584 716876 256 16 6428 10136 497838 897923 256 32 8001 30060 1175022 517265 256 64 10083 49717 709299 386126 256 128 14017 47905 467086 1579483 256 256 9423 51167 1652404 391475 512 4 6213 4494 238694 310652 512 8 9098 13616 569502 379561 512 16 14016 27238 612376 463338 512 32 15191 37144 754083 779258 512 64 10028 21229 678122 210975 512 128 11852 24011 431325 1399189 512 256 18025 39726 1375881 1475116 512 512 27269 88399 1791352 1835760 1024 4 6640 10829 185473 204475 1024 8 7272 16807 229802 779230 1024 16 11687 19684 346625 380799 1024 32 17111 30215 560495 731455 1024 64 24588 53241 552918 626654 1024 128 30878 63948 1486247 1072453 1024 256 33426 82941 945443 977060 1024 512 38761 54645 314977 346401 2048 4 3055 5894 283778 99461 2048 8 7879 6195 850084 708634 2048 16 8120 14209 886217 388178 2048 32 27377 31814 495302 366890 2048 64 31853 61989 1369829 695439 2048 128 39387 33670 650762 324763 2048 256 17660 36554 1113723 705492 2048 512 14885 24179 1709505 1433135 4096 4 4045 4306 248393 314397 4096 8 9667 9141 337675 281453 4096 16 21020 28822 457497 428449 4096 32 20537 19479 765325 365227 4096 64 40463 33270 1449434 865580 4096 128 29211 30624 726888 615483 4096 256 48598 54166 2158056 684844 4096 512 47517 53874 1112123 1045398 8192 4 3816 2220 330974 239750 8192 8 5885 8553 474124 398425 8192 16 9542 18369 1329001 519564 8192 32 24591 31845 824571 557463 8192 64 14795 25268 743237 1396748 8192 128 30556 41011 1665780 602223 8192 256 25424 37997 421877 308458 8192 512 19863 37049 895979 341715 16384 4 5167 6065 180123 199430 16384 8 7596 8335 309945 185974 16384 16 11238 11666 384729 268489 16384 32 14119 19778 541367 395490 16384 64 27675 22283 444165 354624 16384 128 25933 30439 329160 369724 16384 256 32021 43673 474143 750492 16384 512 30428 40368 820964 490980 32768 4 4388 4260 328454 259154 32768 8