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 Apr 28 20:08:32 2026 Auto Mode Machine = Linux oleg149-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-oleg149-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 5735 11520 103570 147751 64 8 10248 14302 192178 238862 64 16 5532 45747 361380 390278 64 32 6847 47655 1105556 109753 64 64 11345 79991 831569 1033216 128 4 7412 21412 179267 214765 128 8 6337 17372 272827 272827 128 16 8279 55629 606767 199966 128 32 19729 90203 962469 735635 128 64 18636 99701 1391557 753179 128 128 24358 113077 831319 1359835 256 4 12325 14476 118086 163162 256 8 19926 30299 241953 187004 256 16 13158 36041 507966 340891 256 32 15670 86308 550409 1084800 256 64 40564 128441 965763 656399 256 128 45786 137786 1213534 1103757 256 256 39725 113373 1287760 2672291 512 4 11555 17529 173747 147676 512 8 23427 31297 293219 213875 512 16 21916 40602 449941 547575 512 32 36415 113444 619084 555363 512 64 35950 129947 971797 1094088 512 128 43596 128194 882718 1537424 512 256 41025 195709 1375881 1115688 512 512 57793 131049 781526 2427068 1024 4 10129 17379 124970 81501 1024 8 21248 26483 158615 125503 1024 16 22483 42593 178556 505897 1024 32 30677 51315 663642 541759 1024 64 37811 53170 470794 565439 1024 128 76446 81678 564473 913471 1024 256 22793 147528 1298041 1254808 1024 512 35016 140713 1592612 588206 2048 4 9745 14370 157138 116376 2048 8 19237 15155 92787 135531 2048 16 33286 50559 247016 291868 2048 32 53172 71550 439297 543639 2048 64 41487 56971 291492 560488 2048 128 64457 130554 1405465 774300 2048 256 41810 89698 1280015 479380 2048 512 51611 129891 1649117 589692 4096 4 14045 14239 139765 116089 4096 8