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 22 13:32:49 2026 Auto Mode Machine = Linux oleg138-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-oleg138-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 3008 9373 582535 496362 64 8 4927 16276 695778 727850 64 16 3384 21556 998622 855419 64 32 1620 25871 1991276 1083249 64 64 4882 65173 969761 2772930 128 4 5034 14222 498114 566435 128 8 7198 9827 731625 819893 128 16 5817 22311 595328 1022989 128 32 6597 39179 1123617 639279 128 64 6121 57011 1291158 1705404 128 128 15291 95514 1579934 2066432 256 4 7665 9066 550409 530031 256 8 9206 20471 536654 828628 256 16 12771 36787 1027695 1062263 256 32 9791 33138 1405778 1112909 256 64 19163 60880 1347557 185774 256 128 14412 65979 1600674 1570244 256 256 11462 67298 542347 2266207 512 4 8256 9877 461248 376236 512 8 15907 20463 922535 579804 512 16 16088 34796 1079785 819398 512 32 17603 46677 790153 285539 512 64 21599 59122 723349 1319250 512 128 14022 81644 1778004 1492545 512 256 12121 21363 343663 1605228 512 512 25835 57168 1815584 1368865 1024 4 6403 8167 111266 77953 1024 8 9152 7197 791289 472555 1024 16 14192 31112 562698 472295 1024 32 23268 46677 1226500 686337 1024 64 57495 53688 2316837 1247157 1024 128 48072 86706 1497127 887242 1024 256 20933 64261 1064479 1499217 1024 512 11067 51166 1129123 763033 2048 4 5541 11215 285154 634420 2048 8 17934 21031 979489 372765 2048 16 27378 32629 562654 596075 2048 32 33979 54250 1371579 389057 2048 64 37229 66525 1521471 512776 2048 128 24176 66967 873777 124915 2048 256 18254 69638 623280 1410543 2048 512 29152 68437 493509 1045919 4096 4 6954 10386 298869 298589 4096 8 10943 11766 331844 321006 4096 16 19270 15017 1442740 397132 4096 32 15658 22328 411860 288694 4096 64 39536 83289 517375 1268841 4096 128 48090 62188 665143 1309859 4096 256 24561 44084 1313264 976195 4096 512 41081 79324 788436 978753 8192 4 8207 8760 381538 236271 8192 8 11770 17722 723990 488607 8192 16 24974 20782 485568 481547 8192 32 30365 32393 523817 385961 8192 64 30632 50980 543307 422354 8192 128 31492 66292 536755 1101209 8192 256 37886 54792 1229293 852370 8192 512 39356 64582 1352063 1256857 16384 4 4487 10655 399971 205392 16384 8 11745 12754 625462 434277 16384 16 18179 19519 572983 538010 16384 32 23567 29321 669964 392891 16384 64 27247 37787 1166876 653352 16384 128 36680 48886 1117302 552283 16384 256 38897 52875 1427557 1063064 16384 512 30854 59372 995201 546299 32768 4 6791 6878 324541 271888 32768 8 10264 12785 448956 702470 32768 16 14576 17640 486360 288727 32768 32 17240 23441 748660 559648 32768 64 24126 40797 1100120 730612 32768 128 33854 45021 1168372 870049 32768 256 39345 42863 831865 932176 32768 512 36875 48154 555738 483860 65536 4