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: Thu Aug 27 22:37:56 2026 Auto Mode Machine = Linux oleg132-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-oleg132-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 1083 3860 388021 342040 64 8 2251 6441 633392 528618 64 16 3415 20299 473593 659861 64 32 6060 19352 703068 831569 64 64 3509 21017 1279447 1638743 128 4 4477 4807 128659 319983 128 8 7329 5597 743788 589446 128 16 5184 12264 785122 722760 128 32 5437 67295 962469 913347 128 64 5520 10454 1409828 1332828 128 128 6990 103727 1637771 564055 256 4 3343 3728 393195 203676 256 8 3620 15050 439013 766517 256 16 16553 31422 744204 985259 256 32 7204 45528 90140 894929 256 64 4146 101097 766517 1163562 256 128 26764 129885 1514860 1422540 256 256 11477 132498 1600674 1497953 512 4 9517 5185 243125 39408 512 8 4789 7891 313190 415550 512 16 11676 21712 960926 370204 512 32 10107 59665 982467 971357 512 64 9193 29046 264214 631277 512 128 15383 53522 1418599 1320061 512 256 23385 35315 1560891 554074 512 512 11333 41058 36511 1770674 1024 4 3918 3386 558019 544645 1024 8 9694 11469 280225 243343 1024 16 15894 15828 503642 421413 1024 32 19600 13633 1011817 850521 1024 64 29173 38435 905384 573671 1024 128 31061 56270 744128 833843 1024 256 32625 98348 968904 647631 1024 512 28621 61178 1563622 347354 2048 4 7770 8051 160000 205089 2048 8 6271 8687 804466 464727 2048 16 8282 14875 275974 386119 2048 32 15260 15552 1272054 636442 2048 64 21512 41844 597236 1226992 2048 128 21796 23647 170412 572555 2048 256 25293 44708 688417 116874 2048 512 21934 58157 1498120 1359854 4096 4 5258 6284 191044 170008 4096 8 4652 6087 233508 347764 4096 16 7301 12414 264925 221165 4096 32 15519 12753 292798 128683 4096 64 12680 27587 279894 519660 4096 128 14961 25673 960584 505620 4096 256 28859 43983 1363502 510518 4096 512 31359 50092 487444 810608 8192 4 3551 4943 209384 190360 8192 8 7502 8361 396211 204855 8192 16 14116 14442 295260 158333 8192 32 12198 41244 752038 717145 8192 64 24631 21825 1179053 591819 8192 128 17934 18973 540121 505931 8192 256 20526 65709 276437 1025424 8192 512 18700 37833 298086 314411 16384 4 4997 3201 172668 74684 16384 8 3643 5771 184050 170485 16384 16 8671 8085 327686 287150 16384 32 13124 15182 452197 451834 16384 64 22017 31379 508962 510387 16384 128 22355 24058