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 Jul 24 19:52:09 2026 Auto Mode Machine = Linux oleg318-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-oleg318-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 4747 12160 444572 19982 64 8 5531 15712 780776 735831 64 16 5904 22582 969761 511494 64 32 6525 34615 1484662 1124074 64 64 3003 29893 727850 1421755 128 4 2702 4918 219596 251956 128 8 3472 9215 677178 687585 128 16 8275 11543 895074 771581 128 32 4324 15912 529038 992724 128 64 12175 19268 617941 1111981 128 128 4802 34325 1319723 1905110 256 4 2325 3920 608074 247360 256 8 5721 7080 612584 360097 256 16 11175 22139 329085 659625 256 32 19719 23522 980760 958008 256 64 8194 28933 1254656 1137672 256 128 4944 107333 1099237 825443 256 256 12426 35914 1312954 1642294 512 4 7641 5994 583110 337505 512 8 5626 6156 779258 627587 512 16 8024 14650 363130 678122 512 32 11564 14685 164421 973118 512 64 19610 19356 1169140 157050 512 128 22797 47407 1556366 1334001 512 256 14799 67922 1624659 1446306 512 512 41306 119067 336184 1306409 1024 4 5792 4791 412232 308905 1024 8 4118 13726 534146 368609 1024 16 13366 20879 202451 826462 1024 32 12496 12580 968031 184763 1024 64 29478 55121 1254808 424370 1024 128 12953 22226 326842 456338 1024 256 19662 30202 574900 1082454 1024 512 20932 23639 1605111 1530197 2048 4 5506 5283 291363 157721 2048 8 17530 11633 355929 210853 2048 16 15382 13767 381523 597610 2048 32 20614 20140 687700 673044 2048 64 30247 32439 707700 173412 2048 128 35626 34964 482585 209363 2048 256 37501 50180 942415 1159578 2048 512 24099 49521 1513696 346650 4096 4 4839 4956 463871 341732 4096 8 10662 1278 738829 602891 4096 16 17618 21463 616234 581564 4096 32 19666 27248 752783 421490 4096 64 22140 34571 418125 483411 4096 128 35497 53875 978029 1412840 4096 256 32558 49090 1256774 766315 4096 512 36306 58588 928801 897833 8192 4 6498 5530 417916 275259 8192 8 10187 10480 469428 337758 8192 16 11948 15816 609606 507620 8192 32 18396 28284 937208 742771 8192 64 21814 38286 578244 536193 8192 128 32142 50965 954893 369957 8192 256 39731 39437 955211 730191 8192 512 34579 40631 604182 731294 16384 4 6775 7298 157810 208753 16384 8 9413 11561 494744 364989 16384 16 16992 17291 405604 415088 16384 32 20909 21205 390310 651611 16384 64 25548 33204 1011863 770425 16384 128 25007 41130 1094245 938267 16384 256 27345 42606 669971 522185 16384 512 36702 48365 264950 442940 32768 4 4882 4449 129857 191088 32768 8