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: Sat Aug 22 06:53:42 2026 Auto Mode Machine = Linux oleg125-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-oleg125-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 2860 5231 228493 598110 64 8 3927 19900 866463 603489 64 16 6340 48587 1033216 1163036 64 32 6310 76372 2133730 913649 64 64 8311 31418 1526887 1599680 128 4 5293 3122 621518 566435 128 8 7828 21764 604036 790905 128 16 9940 20503 1007629 587511 128 32 11616 35465 1391557 1076312 128 64 9103 65505 1294270 1561553 128 128 10407 94108 1710838 1778862 256 4 2539 10287 577962 240167 256 8 6067 10057 739590 391475 256 16 11234 37204 1131677 996229 256 32 7947 19543 1375171 344943 256 64 14293 85790 729540 746272 256 128 10292 71650 514045 1479379 256 256 9152 66494 1286217 2131261 512 4 5524 9415 373943 568146 512 8 11526 11206 592604 703215 512 16 22865 36379 1042566 1069035 512 32 19404 56326 1057974 687237 512 64 14346 85660 1010197 1115688 512 128 27078 68640 1361920 1442420 512 256 41511 83359 1827947 1233614 512 512 40754 100925 1783912 1772135 1024 4 9086 7698 441786 410930 1024 8 13826 11220 189742 297934 1024 16 38767 34308 354815 936782 1024 32 31850 32012 925877 792019 1024 64 25597 74652 1292961 833196 1024 128 24558 42191 449885 732953 1024 256 34021 39560 1614767 433362 1024 512 35725 77329 1622698 250059 2048 4 6374 6917 273470 387059 2048 8 8801 13325 422695 789820 2048 16 9354 12956 622467 473854 2048 32 17316 23165 340710 390988 2048 64 15202 23118 1406616 578376 2048 128 43030 60559 447536 1329751 2048 256 42284 41265 785271 426663 2048 512 40105 46544 846982 946465 4096 4 5133 7612 490365 193171 4096 8 11457 8626 719220 452604 4096 16 16866 23124 843150 784511 4096 32 16741 30378 541664 346327 4096 64 25802 53032 198247 1211145 4096 128 21812 43646 711711 1042480 4096 256 34294 49655 599608 467049 4096 512 39403 82482 1256039 589182 8192 4 2866 5492 266789 203442 8192 8 8973 12530 322800 462877 8192 16 19893 20942 278706 215596 8192 32 24099 31970 890037 609433 8192 64 36060 35415 713897 582933 8192 128 38075 44512 903685 707124 8192 256 41872 53951 1364846 617705 8192 512 48652 66469 1389405 867696 16384 4 7328 8177 425271 382144 16384 8 12729 14467 458922 540176 16384 16 14836 18966 625297 665152 16384 32 24218 35649 545116 891409 16384 64 31716 39341 1064101 785609 16384 128 26960 48439 882990 651994 16384 256 35538 66602 698824 588569 16384 512 38942 42662 844667 807212 32768 4 6243 6867 254958 359988 32768 8 11854 11544 273237 362113 32768 16 18555 18241 673338 475284 32768 32 25156 27267 726771 482804 32768 64 32043 41415 1040157 535609 32768 128 37336 43812 949854 1064174 32768 256