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: Wed Apr 29 17:24:19 2026 Auto Mode Machine = Linux oleg229-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-oleg229-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 2172 18048 789967 492717 64 8 4703 18454 508587 710511 64 16 2327 40379 489126 500060 64 32 5040 45162 1336792 310399 64 64 5095 62560 318502 1638743 128 4 3859 8172 637004 540217 128 8 5991 15786 584950 597981 128 16 4503 14869 978253 907174 128 32 8201 32652 1172704 1057236 128 64 6197 74422 870405 1175271 128 128 12345 82623 1492113 166223 256 4 3100 6766 723153 309899 256 8 5644 15065 917096 703260 256 16 13408 21539 973645 999940 256 32 12836 42497 1099237 477684 256 64 13442 51560 1325925 1274008 256 128 9980 30399 1552085 1525622 256 256 9563 89293 1089202 78142 512 4 5931 3925 304055 167709 512 8 10522 14500 617659 265160 512 16 13185 14299 725303 721163 512 32 17942 47769 1132755 988345 512 64 23514 62332 1383861 1358474 512 128 24871 71719 851903 1450212 512 256 14008 36503 1100818 1595686 512 512 16869 94657 408592 2158696 1024 4 10205 11258 332664 586119 1024 8 4861 6188 435382 87747 1024 16 12480 13834 1216082 547631 1024 32 22056 38126 301426 61068 1024 64 15041 22473 506135 625923 1024 128 24031 63876 1512415 1161176 1024 256 22671 85355 2051273 1127937 1024 512 23186 51197 1684429 683171 2048 4 7660 5322 265598 259202 2048 8 8305 11257 838631 504939 2048 16 19253 18157 510339 508436 2048 32 16829 21105 905747 943347 2048 64 14275 28509 655529 347056 2048 128 16663 45338 1115459 732441 2048 256 38317 67412 350927 752064 2048 512 38887 64728 823200 631900 4096 4 7537 5929 285793 320329 4096 8 12193 12744 1395058 543377 4096 16 21918 19562 731562 503132 4096 32 31209 32910 230968 700767 4096 64 38648 40881 820675 416170 4096 128 42891 94543 390586 1413887 4096 256 24525 59413 537596 1421726 4096 512 40145 57111 598918 1494316 8192 4 8348 5508 277976 247276 8192 8 20033 13055 642060 406933 8192 16 17724 23233 559033 645195 8192 32 27436 27153 445583 382374 8192 64 2635 28141 916631 673511 8192 128 34837 41142 1340354 324553 8192 256 35817 66079 985457 901906 8192 512 28854 35362 691428 939771 16384 4 6327 5028 167207 237548 16384 8 7207 10048 278199 438203 16384 16 9672 15002 494086 600034 16384 32 17456 19270 479373 536792 16384 64 28290 34150 1257313 810086 16384 128 32946 39647 751140 778295 16384 256 31541 40423 861763 471059 16384 512 33158 45019 704932 401784 32768 4 5684 6732 378693 355343 32768 8 10569 8694 590095 295820 32768 16 13827 19495 611789 694972 32768 32 19165 23646 758397 592432 32768 64 24579 24162 495704 449795 32768 128 25882 39732 852732 799724 32768 256