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: Thu Jul 30 03:44:36 2026 Auto Mode Machine = Linux oleg258-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-oleg258-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 4121 3468 608965 496362 64 8 2772 6094 863676 621657 64 16 3709 44166 1049372 203236 64 32 2287 67500 1392258 1183548 64 64 3382 89275 1562436 1734015 128 4 3225 2897 673778 255920 128 8 6410 12272 921183 780556 128 16 3583 19879 731625 87441 128 32 7842 83666 1391557 1133103 128 64 20059 63589 1521718 864797 128 128 20948 77061 1471662 1755594 256 4 5247 6106 374281 551823 256 8 10765 12817 64613 457923 256 16 5944 21634 1158540 409699 256 32 11413 35063 1415041 1128110 256 64 12567 63069 572721 1132871 256 128 18527 69737 697322 565185 256 256 15775 126787 1354356 1755037 512 4 2412 4690 237479 322599 512 8 3491 6907 1085242 714920 512 16 6417 20115 651383 603089 512 32 10300 44047 1454140 126353 512 64 22287 78036 1510391 1171691 512 128 29990 43004 1350783 1394645 512 256 24907 37429 1701913 1000315 512 512 16536 86369 1729323 1605228 1024 4 3545 3493 156193 63630 1024 8 3594 6069 274670 721624 1024 16 13425 20385 562330 870694 1024 32 18555 15519 1226500 690975 1024 64 32570 50007 666216 438002 1024 128 16653 93729 1195102 671843 1024 256 16254 15596 1261072 83914 1024 512 39304 110119 517415 1490891 2048 4 5462 4574 199456 143338 2048 8 15407 7071 152996 769031 2048 16 7410 7492 317172 952552 2048 32 10143 27856 709630 1315294 2048 64 15837 13857 110978 13958 2048 128 15330 49459 1166190 1437211 2048 256 45473 78851 288332 359549 2048 512 31754 121120 1529599 1337828 4096 4 11371 5834 238679 297348 4096 8 8406 10387 338848 288840 4096 16 6030 6234 194927 207109 4096 32 8079 8936 183232 156205 4096 64 10231 38623 1437188 1287286 4096 128 12247 19432 1615134 1401888 4096 256 12655 66668 2039927 945517 4096 512 18319 53107 800150 140413 8192 4 4501 3676 416003 446840 8192 8 5698 5871 178346 151197 8192 16 9294 10653 325105 316318 8192 32 18936 20842 373671 445849 8192 64 13320 15420 320888 247866 8192 128 17996 25289 643214 318568 8192 256 18910 26324 430752 222771 8192 512 17471 47901 837699 942917 16384 4 3875 3007 304710 129823 16384 8 4609 3693 270407 107040 16384 16