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 Sep 6 22:44:51 2026 Auto Mode Machine = Linux oleg160-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-oleg160-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 4994 11646 998622 1083249 64 8 5323 32179 639427 659861 64 16 7377 41807 1083249 913649 64 32 3868 69945 1304314 1357066 64 64 10858 75641 1188789 1518251 128 4 3647 15279 672934 309292 128 8 9907 20081 43272 380811 128 16 20826 31457 335166 927549 128 32 9393 55485 1254941 1278855 128 64 17493 97350 592046 1406136 128 128 18005 117533 1504659 2035099 256 4 5946 9144 81710 259935 256 8 14592 13338 888266 737558 256 16 14520 30599 486559 1260547 256 32 21366 59438 671589 336827 256 64 23376 42285 1306564 2065659 256 128 28362 141583 1487577 1243036 256 256 13045 143092 1361224 1855098 512 4 6619 9424 514514 819085 512 8 10063 30401 1221684 870905 512 16 21031 54014 1201856 335974 512 32 21682 58281 1375881 1015932 512 64 43496 57392 1267097 1248678 512 128 43357 119067 1560891 1429934 512 256 30559 42108 859060 2460437 512 512 22537 74755 1064266 1700565 1024 4 10210 5208 580887 586119 1024 8 14693 22624 982648 219356 1024 16 25774 56942 524620 304029 1024 32 50808 56496 947111 1115632 1024 64 35308 65197 1053512 1232130 1024 128 32414 108797 817185 987619 1024 256 45514 94447 1136593 1689730 1024 512 49793 123508 1052222 1042770 2048 4 9279 12765 621566 654979 2048 8 13727 17915 590381 828440 2048 16 18460 30913 1386635 1110555 2048 32 24115 47330 1062347 812993 2048 64 43205 82384 1489548 748590 2048 128 41315 41469 539914 401721 2048 256 31197 88792 1683044 1205299 2048 512 53933 74394 2039489 1301938 4096 4 10270 11276 298241 301285 4096 8 19355 18071 362445 557882 4096 16 22969 31313 550322 242969 4096 32 39899 48151 1274867 788146 4096 64 35802 50739 1030721 790613 4096 128 42491 64066 1623529 1277237 4096 256 49345 94648 1789419 1187290 4096 512 56025 81988 872038 1143129 8192 4 10231 11815 444902 544357 8192 8 15630 17536 570591 486290 8192 16 17516 26000 346984 246147 8192 32 30069 62255 780037 325364 8192 64 28552 53628 1458714 989600 8192 128 38093 42880 920461 688754 8192 256 47981 65630 1272215 890060 8192 512 50081 63059 1054827 688050 16384 4 3990 8203 403945 430986 16384 8 15408 17692 308893 268190 16384 16 21999 23722 635803 563136 16384 32 29864 38191 578676 506665 16384 64 32446 54450 707304 916482 16384 128 42293 70329 1274522 918331 16384 256 47611 77512 1240271 682100 16384 512 45199 57321 864963 606388 32768 4 9114 9237 284998 277269 32768 8 13923 15506 793455 515106 32768 16 21229 23994 773851 370674 32768 32 23692 35394 715474 692388 32768 64 32934 60440 1015712 622101 32768 128 44494 48182 1159599 1379011 32768 256 34354 70737 792512 709678 32768 512 55487 66580 1474037 1366806 65536 4 10010 10134 373514 325698 65536 8