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 Sep 8 19:17:12 2026 Auto Mode Machine = Linux oleg447-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-oleg447-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 5633 11393 552557 404998 64 8 4687 9727 809014 674790 64 16 3393 27397 1017549 889431 64 32 10244 35358 1163036 224480 64 64 7042 86962 983980 1599680 128 4 3873 10254 345965 304037 128 8 6717 20704 376538 617941 128 16 8673 53892 1007629 794416 128 32 11673 66078 976473 692017 128 64 8589 56639 1209698 1024942 128 128 14139 57630 1451764 255554 256 4 6230 12581 180557 483056 256 8 10090 9602 372076 143648 256 16 7752 35174 1089202 761623 256 32 11132 42230 1280084 1040643 256 64 13703 59013 1455317 1153561 256 128 15612 73164 484801 697776 256 256 21746 43315 672010 1581810 512 4 10071 8288 432454 360267 512 8 12164 20617 390252 598050 512 16 10086 23702 544658 799865 512 32 27154 27985 1179413 512916 512 64 26137 56060 1254513 820650 512 128 18358 67697 1329871 313922 512 256 19818 84587 1446306 1160923 512 512 34284 73880 285881 1110496 1024 4 10615 8253 675011 284137 1024 8 13716 27719 485317 408468 1024 16 15080 36703 602649 490864 1024 32 36070 54116 997019 752340 1024 64 30616 75349 558309 1367037 1024 128 41402 67002 1226500 772781 1024 256 54111 52604 1248607 763576 1024 512 51328 81470 1635675 974179 2048 4 8508 10416 370338 440152 2048 8 9974 16444 365781 424282 2048 16 17535 27378 717573 318608 2048 32 22019 69931 956477 615377 2048 64 39607 34710 581351 1194738 2048 128 39292 72526 1539744 1335747 2048 256 29463 76001 1688337 447257 2048 512 47455 66588 868915 331123 4096 4 8423 9950 253529 268205 4096 8 12696 10609 279457 457400 4096 16 17645 24360 486739 490786 4096 32 25214 29195 472756 491839 4096 64 30935 35351 905595 704502 4096 128 37383 42388 1571836 388686 4096 256 36283 54418 551648 638092 4096 512 45842 59266 981773 756429 8192 4 9702 10869 450331 302019 8192 8 15463 2824 481088 512642 8192 16 25185 29102 660169 511581 8192 32 27896 41666 598176 401470 8192 64 33479 60397 743994 730377 8192 128 45562 58067 1161515 795183 8192 256 46639 73117 973258 1048902 8192 512 49006 91507 529272 716637 16384 4 11055 11456 406167 327007 16384 8 15220 17976 652044 345558 16384 16 22746 24948 768117 368570 16384 32 30831 33590 414480 769493 16384 64 34932 34801 863995 492602 16384 128 39338 56030 1190858 789708 16384 256 49360 69814 656648 690378 16384 512 50721 62858 1352484 590816 32768 4 8997 9206 305360 428542 32768 8 12404 15032 306606 465341 32768 16 20675 22453 657675 551297 32768 32 32579 40881 933613 581632 32768 64 44216 72574 1048345 1075306 32768 128 52868 67604 809246 669774 32768 256 38148 72596 1118856 885287 32768 512 56754 85820 975153 651283 65536 4 10526 11996 281347 275042