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 May 25 01:49:10 2026 Auto Mode Machine = Linux oleg404-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-oleg404-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 1482 1729 681644 456673 64 8 1949 16297 735831 561808 64 16 3133 39143 863676 571375 64 32 3167 54187 1066042 491815 64 64 3187 52584 409946 1105556 128 4 1673 6306 357483 542400 128 8 8031 16560 757430 526961 128 16 3049 27222 864797 841746 128 32 6354 42498 1266785 992724 128 64 4787 25402 1421023 711270 128 128 2924 51219 1217930 1196221 256 4 1749 7235 408297 356038 256 8 2562 13483 733527 482189 256 16 9643 18788 977189 815414 256 32 6586 33351 812329 723153 256 64 17137 77932 1368162 1375171 256 128 4843 43957 1619994 1523457 256 256 17537 91750 1694118 2114473 512 4 7299 4030 629796 77802 512 8 6523 18223 441432 653961 512 16 10226 32694 1276891 804962 512 32 9602 62226 337293 944860 512 64 25339 60607 721163 1174254 512 128 22264 32786 1514652 1219602 512 256 14146 47218 1551867 1279935 512 512 9477 31630 1766304 266542 1024 4 3047 11478 537286 269044 1024 8 3395 5341 724179 115942 1024 16 16931 29186 588206 772920 1024 32 5832 32412 1180972 1033486 1024 64 11472 15632 1098511 1207534 1024 128 30967 27652 795540 1062372 1024 256 16729 34404 535278 217545 1024 512 14953 62286 468432 1592612 2048 4 10964 6796 136324 67430 2048 8 12285 11960 723435 350755 2048 16 14387 20812 152653 634280 2048 32 10141 29557 213489 200041 2048 64 28021 22862 1088186 410828 2048 128 26546 36919 372022 1186486 2048 256 32262 51674 1540020 1248028 2048 512 17030 49551 1695335 1451295 4096 4 6009 6535 342366 159117 4096 8 7962 14638 391628 282615 4096 16 8796 16079 113638 202199 4096 32 14820 17499 428759 393124 4096 64 19873 35462 356511 989577 4096 128 24976 33453 772691 597087 4096 256 38463 43460 420273 223130 4096 512 25947 48722 247417 585907 8192 4 4312 7984 253795 122899 8192 8 11106 8193 582143 246732 8192 16 8823 33960 317925 438497 8192 32 13966 25840 271969 213940 8192 64 37561 36614 600717 500208 8192 128 19124 30129 842278 699865 8192 256 43322 45606 267582 384565 8192 512 30637 42173 854575 446625 16384 4 4905 5592 171603 165368 16384 8 8906 10884 405966 406862 16384 16 11775 16343 439495 299996 16384 32 14169 23752 356856 240453 16384 64 26159 37185 1151450 670317 16384 128 26669 37875 583472 507999 16384 256 32031 41473 457514 419060 16384 512 41899 44915 709539 479794 32768 4 6241 6636 197228 209951 32768 8