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 Sep 29 00:57:02 2026 Auto Mode Machine = Linux oleg137-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-oleg137-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 2864 6038 955947 467815 64 8 6259 28457 789967 451299 64 16 2425 26801 1119387 476959 64 32 4948 68974 592827 1066042 64 64 2540 45778 901377 1562436 128 4 2720 4360 592699 130346 128 8 3170 16503 438331 649331 128 16 7076 27664 960747 379734 128 32 9135 52806 780556 744820 128 64 13818 39386 633995 1185654 128 128 11120 98765 1455701 1755594 256 4 3426 4115 150409 46741 256 8 5991 14052 313702 701422 256 16 5637 5479 897923 853662 256 32 21235 34763 507966 729045 256 64 9672 37497 1243036 1122215 256 128 13384 96682 1107172 1581810 256 256 4795 37328 575175 2000242 512 4 3067 9506 74843 268609 512 8 11365 7459 234651 661414 512 16 17625 29609 169589 646480 512 32 7356 10342 575917 266410 512 64 15466 39383 1071167 486317 512 128 18913 44425 483906 579179 512 256 24497 73977 1437592 1100818 512 512 34006 95648 558396 1902438 1024 4 8572 9867 444668 268405 1024 8 9069 12698 283424 318103 1024 16 11308 32359 978841 719568 1024 32 18272 58297 1064479 220777 1024 64 29614 50910 1091532 657647 1024 128 25604 47361 405882 648511 1024 256 27149 64324 209922 1013967 1024 512 42075 105434 803728 1628234 2048 4 8609 7366 233283 111002 2048 8 6817 10459 165052 445124 2048 16 23969 12715 864195 514558 2048 32 14255 24076 456843 493368 2048 64 14186 20833 1224892 1091089 2048 128 30986 40930 1268110 1205468 2048 256 22215 21223 734571 252468 2048 512 19684 28868 504198 801912 4096 4 8088 4416 201021 283674 4096 8 11710 9408 154153 141481 4096 16 9144 14234 322949 198430 4096 32 19766 13293 238527 206628 4096 64 28697 35429 827275 387214 4096 128 24535 42330 995368 426354 4096 256 32824 24162 919604 441666 4096 512 30509 61771 950592 1662331 8192 4 7052 5246 150427 261434 8192 8 7769 13867 436204 223574 8192 16 11073 20482 606271 589100 8192 32 21041 24387 500828 330509 8192 64 20724 23808 683914 417342 8192 128 19080 41330 500646 789211 8192 256 29206 43547 766534 584063 8192 512 29199 37101 838496 525564 16384 4 5101 5614 192923 235835 16384 8 10689 9929 531395 536163 16384 16 15574 17685 708252 602840 16384 32 19076 25344 805226 902590 16384 64 20466 27407 514911 365111 16384 128 22486 31493 604580 501207 16384 256 28123 57200 1031161 369257 16384 512 75469 46351 695008 554937 32768 4 5577 5465 535102 179720 32768 8