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: Sun Aug 9 17:27:30 2026 Auto Mode Machine = Linux oleg401-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-oleg401-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 3097 6650 653436 603489 64 8 3658 22726 195111 695778 64 16 3246 31715 614542 9838 64 32 3112 40996 1226821 718114 64 64 5336 78151 1690338 1638743 128 4 7084 13212 249034 221865 128 8 3878 6603 688467 767171 128 16 5229 18647 976473 857887 128 32 10994 26677 236111 889145 128 64 12670 81321 1162547 1332828 128 128 12718 110064 739689 2027414 256 4 5210 9484 636930 452329 256 8 7669 13343 342195 391475 256 16 5152 25462 632056 852984 256 32 12208 32052 1369908 1036624 256 64 13127 71227 1012194 632056 256 128 12394 89256 1422540 618227 256 256 16877 84794 591330 616807 512 4 8716 10001 218800 303153 512 8 16039 20898 187687 276459 512 16 18872 11099 34404 920953 512 32 14439 41019 1296159 1025636 512 64 18190 65902 140241 733478 512 128 26561 83687 607353 152424 512 256 45377 118241 1207261 1129775 512 512 19392 61598 828247 1594501 1024 4 7833 8320 245850 345371 1024 8 11712 19540 420547 598868 1024 16 20095 19849 503701 646461 1024 32 33480 36442 645975 579789 1024 64 26557 50114 500007 1250425 1024 128 29580 48528 683497 436134 1024 256 25410 131719 952573 604515 1024 512 26457 92712 1239598 558963 2048 4 5849 6533 104510 186317 2048 8 12532 13269 252031 95313 2048 16 6760 20169 504405 218058 2048 32 16198 16758 574009 1320552 2048 64 20262 38114 1192912 526866 2048 128 29321 26102 495531 757703 2048 256 28790 55394 376606 673413 2048 512 35645 74106 356298 647670 4096 4 6242 10213 315732 283614 4096 8 12366 9945 293724 177185 4096 16 13692 17688 475780 410993 4096 32 24793 43043 335211 351256 4096 64 22921 35142 679723 381801 4096 128 38456 41041 777235 552766 4096 256 23604 48502 1134973 1095458 4096 512 20890 38937 458425 425478 8192 4 6904 8459 405846 258194 8192 8 10953 16990 631266 467716 8192 16 18129 17888 807252 504898 8192 32 17849 28509 563257 715219 8192 64 30214 30868 653055 395422 8192 128 37367 40654 1057163 903590 8192 256 36926 39616 905495 778782 8192 512 42232 51528 703000 660271 16384 4 7531 8052 245034 264108 16384 8 10789 10431 615916 499800 16384 16 12200 17088 676294 626392 16384 32 16540 21671 376911 430037 16384 64 18931 26875 964567 549189 16384 128 25599 50286 1079886 728664 16384 256 34988 109709 1056478 782051 16384 512 20890 34298 998295 766139 32768 4 7858 6272 437717 359905 32768 8 9774 11138 851580 600047 32768 16 16073 13925 912477 594215 32768 32 16431 36399 572486 528252 32768 64