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 Apr 1 07:17:58 2026 Auto Mode Machine = Linux oleg323-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-oleg323-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 4069 10828 581273 481234 64 8 4952 5770 778512 621657 64 16 1681 7482 1013707 842003 64 32 1858 20882 926260 136205 64 64 5962 61954 1279447 69420 128 4 4409 9973 438331 597981 128 8 5534 10384 419822 225027 128 16 6976 18443 1196221 1007629 128 32 8309 72886 743788 1067750 128 64 12039 62500 1254941 1487977 128 128 8056 47045 415597 1885042 256 4 6557 12594 425277 61702 256 8 8189 8901 965763 341759 256 16 12524 38157 1103757 530031 256 32 16516 35223 1231629 1117543 256 64 25502 61144 1561112 1122215 256 128 23121 38811 148762 802614 256 256 15857 128456 1683493 2097948 512 4 6392 7177 166939 242658 512 8 7841 14686 835334 566946 512 16 15039 28571 1153441 846530 512 32 20128 27193 609421 1160923 512 64 18053 28625 1383861 1276891 512 128 16535 109499 1537424 105871 512 256 28348 80316 1689859 1640796 512 512 29941 61302 1015932 1120344 1024 4 5366 7756 218475 185401 1024 8 12233 11645 597036 423324 1024 16 16412 25488 815323 607766 1024 32 23944 44494 236262 690530 1024 64 15306 24975 511987 427751 1024 128 27426 84495 242930 1084640 1024 256 39128 103916 581201 1577404 1024 512 41486 52396 1017811 782210 2048 4 6799 8348 143750 476958 2048 8 9374 15369 226624 219973 2048 16 17728 16255 360697 342585 2048 32 21864 33981 636583 584834 2048 64 26638 39586 1510236 789530 2048 128 31353 82962 1516904 527287 2048 256 46069 72939 437886 754641 2048 512 30487 55346 1609866 1557613 4096 4 6391 5057 304965 223519 4096 8 8458 9297 456585 672591 4096 16 12314 14403 412781 251521 4096 32 23621 1366 310185 1195886 4096 64 29064 41204 1047309 653380 4096 128 20832 39429 445272 369508 4096 256 36264 37634 759102 517890 4096 512 30145 62362 487333 498910 8192 4 5779 6942 412656 297544 8192 8 8406 11402 247597 341786 8192 16 21058 20617 265940 475673 8192 32 22153 26859 439839 623590 8192 64 30798 43188 920437 600287 8192 128 24203 61140 603736 853874 8192 256 41293 43414 785350 1008983 8192 512 38374 57707 481688 491986 16384 4 5731 6115 229538 197655 16384 8 8852 10649 256629 266740 16384 16 16909 17996 376057 472172 16384 32 20871 28497 516797 722618 16384 64 31343 38054 445242 751214 16384 128 31103 45474 1064794 841502 16384 256 34050 57321 778525 784032 16384 512 53105 64491 439993 712814 32768 4 6464 7046 368631 396299 32768 8 10751 11215 444595 584588 32768 16 17150 22450 539808 496718 32768 32