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: Thu Aug 27 15:41:13 2026 Auto Mode Machine = Linux oleg109-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-oleg109-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 3492 7671 537079 90510 64 8 1897 26478 476959 651849 64 16 5318 41153 325058 1066042 64 32 8247 40846 1204796 983980 64 64 4595 61825 474430 1562436 128 4 6315 11986 327399 397444 128 8 8315 17003 907174 561694 128 16 8686 27959 294207 780556 128 32 9984 8718 1281909 1024942 128 64 10931 62749 606767 1332828 128 128 6043 63709 1440082 1684006 256 4 6721 8961 419790 532133 256 8 11407 25311 636930 762164 256 16 13448 42931 1070737 521283 256 32 11123 46360 677522 1122215 256 64 20375 98015 985259 407676 256 128 17218 79502 1143731 1361224 256 256 22334 59270 2726577 1123389 512 4 14492 8592 601063 188859 512 8 10227 20361 412200 584539 512 16 11855 41127 399992 859060 512 32 15298 49795 247582 819085 512 64 38540 132333 1454140 785241 512 128 30776 73870 536092 1237168 512 256 24191 115234 1501940 502946 512 512 37260 70021 1807941 1869318 1024 4 5577 9223 615430 142105 1024 8 15935 19528 926676 594639 1024 16 17726 11778 1232130 817807 1024 32 14260 15146 244632 272994 1024 64 32373 36935 944612 1361836 1024 128 32759 73299 947320 797460 1024 256 18270 41558 536749 664464 1024 512 20679 68839 1607514 1338911 2048 4 10112 13738 348719 875558 2048 8 20344 17571 883846 376391 2048 16 23258 33172 855843 211680 2048 32 29969 83872 1289623 350326 2048 64 50147 64172 997112 364292 2048 128 42951 111809 850841 1039590 2048 256 72721 101096 1751687 339123 2048 512 28512 63371 551598 1141549 4096 4 6073 7488 86956 243245 4096 8 16071 19623 292046 458829 4096 16 16891 34288 543240 823153 4096 32 35174 26033 588496 625636 4096 64 31952 78326 1356290 793827 4096 128 61844 110801 1581531 1011842 4096 256 42976 74628 638803 286996 4096 512 52721 44382 376299 423715 8192 4 8753 13585 331405 297502 8192 8 12020 2499 631371 587117 8192 16 11187 22726 747376 292351 8192 32 10911 20545 588847 483417 8192 64 17766 27324 871592 172557 8192 128 23059 60178 455694 528889 8192 256 29292 43235 901409 738350 8192 512 37336 53286 1314510 728241 16384 4 6884 10344 232209 164971 16384 8 10547 15031 589503 362276 16384 16 14362 21337 837840 776826 16384 32 28822 47822 1071418 433048 16384 64 37814 71170 2014772 1711662 16384 128 53742 57224 698952 642635 16384 256 43684 80422 899672 792376 16384 512 26598 44224 1050390 1005099 32768 4 6632 7419 263656 264834 32768 8 12931 15522 505173 431014 32768 16 29489 33910 764251 539791 32768 32 41850 39717 897362 675545 32768 64 36392 47964 712256 801155 32768 128 31492 51012 850494 986627 32768 256 64334 58921 1142346 1081704 32768 512 41974 67671 465500 508907 65536 4