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: Sun Nov 16 22:25:19 2025 Auto Mode Machine = Linux oleg445-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-oleg445-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 2010 11114 231848 212739 64 8 2244 19930 467002 355635 64 16 4264 40556 571375 453587 64 32 4358 56898 926260 743988 64 64 4548 81127 1029254 1492919 128 4 3591 14383 248114 258135 128 8 3380 5677 419822 405245 128 16 7146 42565 327399 345075 128 32 3437 36835 889145 639279 128 64 8722 83328 1172704 864797 128 128 9247 92742 1487977 1778862 256 4 7849 14002 246169 250944 256 8 5174 23793 64032 387939 256 16 12627 11226 509895 721210 256 32 14607 48293 820398 555248 256 64 7264 80940 613985 1024752 256 128 5816 25879 425951 1164824 256 256 11251 100042 1514860 1952947 512 4 10461 14845 273188 212984 512 8 10888 26547 139132 370459 512 16 6795 15834 744153 515626 512 32 6301 58440 363868 709019 512 64 25473 82025 1075459 978885 512 128 22049 81971 1640796 1185272 512 256 22192 92552 932956 1484293 512 512 16677 108750 1496706 2265742 1024 4 7096 6701 136240 116921 1024 8 13091 16969 443291 564844 1024 16 13006 28248 274898 652650 1024 32 17672 63366 761950 808874 1024 64 19776 60797 1022902 440789 1024 128 35361 56390 1328146 1065535 1024 256 20696 31323 1280243 1167489 1024 512 40060 71528 1400926 1514549 2048 4 4588 13145 189052 227001 2048 8 14232 10385 231492 183613 2048 16 29780 42679 476271 439769 2048 32 35636 65529 634842 625140 2048 64 38848 56615 1053616 933911 2048 128 31505 76606 1199911 1223496 2048 256 47070 44575 957543 929163 2048 512 21102 49999 1451540 1409386 4096 4 8154 8158 111845 118845 4096 8 12748 8617 387546 351975 4096 16 21019 21982 367689 549952 4096 32 13804 31989 630365 706211 4096 64 44103 40966 857287 312937 4096 128 35922 79640 1028623 1027331 4096 256 28941 96186 1120610 962845 4096 512 26953 30905 1455081 885204 8192 4 9229 7696 90936 97572 8192 8 14515 14157 154870 172932 8192 16 15181 24807 137852 172332 8192 32 24340 47092 864139 572864 8192 64 31198 57102 635928 358321 8192 128 37431 35238 388391 477418 8192 256 34355 51546 632638 1001338 8192 512 24527 36138 551841 1490544 16384 4 6546 7112 72800 222596 16384 8 12490 14722 173857 179454 16384 16 21168 21035 486837 594959 16384 32 32069 31638 993087 687532 16384 64 37179 56010 1102991 845582 16384 128 30376 51374 1137460 623793 16384 256 43705 68758 701642 889321 16384 512 44731 69862 1364082 935648 32768 4 8255 8622 132026 94573 32768 8 13304 18724 360202 259495 32768 16 20303 30297 297598 308633 32768 32 33515 39362 494708 721158 32768 64 44112 55677 669405 662743 32768 128 43153 61696 667601 424153 32768 256 32695 48045 1271360 1016283 32768 512 44600 58458 553783 790388 65536 4