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: Fri Apr 3 07:46:31 2026 Auto Mode Machine = Linux oleg326-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-oleg326-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 2036 10158 673098 528618 64 8 3904 9094 735831 473593 64 16 3222 38624 1279447 598110 64 32 6086 45101 1232453 1083249 64 64 5673 70109 1304314 1879725 128 4 7880 12938 371073 568836 128 8 11094 13442 895074 579270 128 16 10507 30992 1196221 870405 128 32 8230 53714 948860 1076312 128 64 9597 48155 1349580 1346196 128 128 16358 72483 1526043 1939522 256 4 7165 4174 668662 548161 256 8 11537 14671 298029 839644 256 16 6336 39719 132433 368375 256 32 8053 33938 1391207 1185399 256 64 14483 47849 1180188 567575 256 128 16752 84594 713067 1506359 256 256 28268 81710 1552085 2187712 512 4 7238 6315 637650 526756 512 8 14862 9990 598050 378691 512 16 15548 23721 1143004 194381 512 32 12677 34369 744153 768934 512 64 16370 76168 1333173 470959 512 128 13243 50349 668413 1467055 512 256 26420 119180 721163 1047141 512 512 18053 178959 1430887 1718254 1024 4 6704 6281 409285 568282 1024 8 8093 11017 361048 171375 1024 16 19483 16486 1060013 422949 1024 32 40568 34458 1220575 957884 1024 64 31718 65549 1033486 1066594 1024 128 25937 86114 1471481 394149 1024 256 41915 62791 760735 1551198 1024 512 30469 85748 1087111 1668074 2048 4 6021 7269 560159 206703 2048 8 10866 8793 282602 513266 2048 16 20074 25435 1060118 877885 2048 32 21028 28343 462003 395670 2048 64 25734 32958 407553 236053 2048 128 24319 34169 605018 1197569 2048 256 28176 42644 1510236 361000 2048 512 25683 44156 330270 1068957 4096 4 5792 7238 576567 292653 4096 8 8670 9975 682775 382737 4096 16 11894 29089 386778 343564 4096 32 15449 29831 907173 395750 4096 64 20811 49853 1265011 419289 4096 128 30459 42986 1368935 834063 4096 256 41579 67931 1089346 531953 4096 512 46302 68828 530213 842241 8192 4 6450 7697 441665 449518 8192 8 11613 13087 295664 358261 8192 16 17302 19485 721755 579189 8192 32 24871 39907 1036436 307737 8192 64 31887 34509 1005529 369790 8192 128 30553 64350 725274 687885 8192 256 36299 67765 1397714 796825 8192 512 38886 59791 1140011 718976 16384 4 5781 6835 408243 231520 16384 8 8876 11461 412809 271596 16384 16 17878 29666 398367 428049 16384 32 25097 43591 940798 466581 16384 64 33062 47409 571543 744968 16384 128 39403 36293 1217333 536989 16384 256 50384 66748 1179818 668218 16384 512 43502 55949 1024245 434197 32768 4 7600 7009 324689 181915 32768 8 8739 11573 611527 364234 32768 16 17786 17874 555709 415610 32768 32 19416 26782 862520 657713 32768 64 23865 48296 869570 1013548 32768 128 36964 53642