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 Mar 11 09:26:29 2026 Auto Mode Machine = Linux oleg103-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-oleg103-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 5537 10433 226948 225423 64 8 3301 11991 388021 188269 64 16 8293 35873 471099 489126 64 32 9162 36119 627470 842003 64 64 7873 60257 809014 1255511 128 4 6412 12626 82420 42091 128 8 7222 8291 382985 355589 128 16 4318 8935 584950 494444 128 32 7683 57395 247656 255433 128 64 6310 56885 695603 913347 128 128 6420 44198 1294270 403721 256 4 8719 9623 130422 191472 256 8 7836 23598 547044 484801 256 16 13810 13508 37465 507006 256 32 12462 46376 1019886 231469 256 64 14967 59563 1570244 1016025 256 128 11289 79904 1158540 1479379 256 256 8351 30217 1632308 91860 512 4 5880 13528 194451 202539 512 8 11499 17980 386112 287180 512 16 11313 22533 251232 518740 512 32 20387 59680 790153 292580 512 64 18136 38329 557816 866338 512 128 24412 27855 635198 709254 512 256 26264 71347 1480200 875164 512 512 27786 66459 1575781 591136 1024 4 9344 11341 214364 105502 1024 8 12099 21241 189767 100935 1024 16 19021 30177 276598 180887 1024 32 32549 21979 271767 724179 1024 64 37515 51488 1085737 431533 1024 128 37042 90276 1102176 986485 1024 256 37865 76982 1648862 973516 1024 512 42015 126419 1436056 1473500 2048 4 10270 12022 172447 196846 2048 8 19899 23257 163658 427215 2048 16 34242 42862 191582 513543 2048 32 37577 49117 739122 813686 2048 64 53508 63733 1036454 690020 2048 128 41654 75992 1620190 1156456 2048 256 52235 76551 1461916 1122162 2048 512 56743 113715 1633127 1564421 4096 4 13881 15762 173207 196187 4096 8 21771 24596 390497 146254 4096 16 29896 38300 560082 515868 4096 32 46114 61416 727689 575119 4096 64 57876 78377 751433 760076 4096 128 52976 81567 503501 953441 4096 256 60277 64859 1154421 517562 4096 512 55107 86878 938390 576084 8192 4 10373 10794 114597 210504 8192 8 18709 20977 216216 256207 8192 16 23920 37383 705845 509895 8192 32 39474 47518 515286 472215 8192 64 45731 68188 447673 389518 8192 128 55054 72291 1192061 1144302 8192 256 63712 63149 1418077 903281 8192 512 61667 89757 1512858 790209 16384 4 13392 12631 214987 239248 16384 8 15189 5066 300359 332049 16384 16 32527 38440 842927 530657 16384 32 42436 53017 748367 333387 16384 64 45390 70818 618287 871711 16384 128 45787 80567 944911 856767 16384 256 45093 79579 906197 605357 16384 512 52628 88416 1247068 555368 32768 4 12164 12365 209976 188156 32768 8 22505 23753 376337 370544 32768 16 31364 35433 621820 364056 32768 32 47913 52392 907548 851601 32768 64 59180 74273 1131922 801347 32768 128 52718 79385 922546 772485 32768 256 72834 101489 1360339 1122007 32768 512 73590 104313 1510736 1546033 65536 4 13932 14173 236712 235414 65536 8 23926 24060 415362 352285 65536 16 31647 32538 425039 383352 65536 32 30397 37228 468422 573874 65536 64 34806 55409 508725 541240 65536 128 50293 60012 1022433 796277 65536 256 60197 79690 1016869 1112231 65536 512