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: Mon Mar 2 12:00:31 2026 Auto Mode Machine = Linux oleg351-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-oleg351-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 1186 6787 423529 542506 64 8 2146 4525 874936 367817 64 16 3573 24168 1232453 969761 64 32 3276 38321 1249666 789967 64 64 1828 60216 1638743 1526887 128 4 8701 6267 687585 518312 128 8 3596 9948 627328 715059 128 16 6714 43984 143020 962469 128 32 9383 29549 1217930 848397 128 64 9424 87015 1406136 1391557 128 128 5424 102636 1455701 821147 256 4 3824 8305 633548 600928 256 8 9223 22654 1066483 560172 256 16 3825 11939 338633 286422 256 32 7805 33599 1123389 996229 256 64 6869 33670 1178892 1131677 256 128 15715 56276 649647 1455317 256 256 6257 54030 800221 2015259 512 4 5812 6514 595397 442068 512 8 11259 8594 302769 471476 512 16 4958 7795 948197 184574 512 32 12977 24932 1112797 930933 512 64 11099 48084 935801 403146 512 128 16324 30082 819398 279663 512 256 14459 59291 1524329 1340664 512 512 14447 62829 1150351 1917728 1024 4 6520 5780 68339 131825 1024 8 11580 14769 450545 344678 1024 16 14924 26127 894448 427368 1024 32 12950 22915 1142945 273272 1024 64 19173 33516 257417 334399 1024 128 22629 27794 936782 840041 1024 256 27576 31402 542992 1324868 1024 512 29183 41007 459216 259831 2048 4 6925 8598 169748 225027 2048 8 9101 12365 226899 310399 2048 16 10243 9773 406339 886949 2048 32 28007 22063 1257160 1030239 2048 64 32234 33223 357098 1137166 2048 128 33934 55511 479836 894337 2048 256 29211 47982 844484 675425 2048 512 32348 77416 508316 1431225 4096 4 5318 5032 299745 226686 4096 8 9350 8764 363866 348060 4096 16 23458 10626 311580 194556 4096 32 15498 10697 712597 443536 4096 64 28334 34727 1314570 710622 4096 128 21869 43784 744852 453847 4096 256 39895 68385 1478626 536404 4096 512 48850 75977 916122 651497 8192 4 5940 4297 256120 167628 8192 8 1975 13048 321254 409376 8192 16 8401 8698 336385 438710 8192 32 18354 24472 348356 639396 8192 64 22979 26116 420015 504090 8192 128 18865 25308 440171 617605 8192 256 21843 30901 700350 469698 8192 512 37885 36123 629186 490777 16384 4 4181 5159 244716 150340 16384 8 6983 7562 348877 422691 16384 16 10809 12157 222373 382785 16384 32 12494 15408 644455 346304 16384 64 21245 21187 565160 561709 16384 128 18626 36015 692040 845280 16384 256 31350 41505 326141 435617 16384 512 31584 44345 1121734 601379 32768 4 4341 4414 285746 179877 32768 8 8285 11270 343178 233287 32768 16