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: Mon Aug 24 22:31:31 2026 Auto Mode Machine = Linux oleg333-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-oleg333-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 2434 4119 566551 566551 64 8 1870 9455 760859 312204 64 16 1367 8157 877797 863676 64 32 2780 11283 863676 1124074 64 64 2661 58921 1421755 1484662 128 4 1841 5319 250545 225027 128 8 4502 8348 692017 258011 128 16 5337 14134 1085013 539674 128 32 7867 39937 1266785 1085013 128 64 5147 54444 1377278 164997 128 128 7829 58287 1579934 1967960 256 4 2596 4691 352647 67941 256 8 3395 9143 775373 560172 256 16 3077 8272 498069 380920 256 32 4734 18971 1027695 768712 256 64 5949 19886 658008 298029 256 128 11233 28428 1398455 532133 256 256 11873 29024 1298662 1924938 512 4 4403 9016 304918 441795 512 8 3247 6478 811349 415228 512 16 17563 35295 885996 533297 512 32 10773 36752 1347393 932550 512 64 8209 52314 884536 603089 512 128 22430 74266 1340664 942786 512 256 13535 39105 1459080 1391032 512 512 18979 51764 232844 951558 1024 4 6750 11443 355667 258782 1024 8 10265 12399 261556 702847 1024 16 16978 23689 116127 692311 1024 32 18653 37328 790707 929886 1024 64 15098 15305 299848 459167 1024 128 23306 42112 459610 189073 1024 256 14996 67345 1540074 1275301 1024 512 14095 78684 1061322 217689 2048 4 5595 5192 163056 158110 2048 8 9472 9204 1007285 432899 2048 16 12105 13509 1137768 1001413 2048 32 23447 20713 1349174 1127168 2048 64 23683 44712 534871 1235996 2048 128 22924 64477 1608660 1397918 2048 256 31882 43285 331557 490522 2048 512 19164 41333 1583746 1354493 4096 4 3967 4847 189498 146657 4096 8 10582 8880 670491 418125 4096 16 16035 16947 511933 248092 4096 32 22420 29510 592351 392567 4096 64 26878 34589 497566 764882 4096 128 19991 35349 1440200 857287 4096 256 40470 46348 609522 449419 4096 512 33486 32366 886391 697665 8192 4 6265 1888 202646 210030 8192 8 8784 9727 253647 241645 8192 16 13376 12261 401371 275261 8192 32 16575 23627 1102128 453702 8192 64 15481 37552 1075058 383142 8192 128 23972 42283 1078466 626970 8192 256 33703 37059 817820 967285 8192 512 25188 59455 768901 406226 16384 4 5717 5567 246320 215533 16384 8 9441 10889 469549 280966 16384 16 18227 17074 386862 405815 16384 32 18823 24503 519449 652719 16384 64 28240 40978 666636 614808 16384 128 33091 37789 915920 549321 16384 256 26568 27223 454302 460303 16384 512 31441 41066 759081 325556 32768 4 6829 4594 125482 213297 32768 8 8004 7443 184599 160432 32768 16