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 Sep 4 22:28:04 2026 Auto Mode Machine = Linux oleg622-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-oleg622-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 1708 2614 695778 592827 64 8 927 19494 404998 863676 64 16 1562 10522 1049372 275939 64 32 2131 21340 1124074 1101022 64 64 2067 17708 1304314 1679761 128 4 6089 7668 618653 568836 128 8 3549 16797 816154 433727 128 16 11015 30175 1093856 1000121 128 32 3511 7979 1254941 1196221 128 64 2979 52393 1618028 1172704 128 128 2417 46290 1487977 895074 256 4 2414 10749 436160 433869 256 8 3354 4701 805021 701422 256 16 2309 7921 1190657 951219 256 32 6182 41577 867455 992545 256 64 8219 21578 1230218 1293967 256 128 6107 18540 243544 1248819 256 256 5327 16729 1778290 2081678 512 4 3049 5998 641651 367040 512 8 3497 5324 634448 817837 512 16 18006 31951 1158418 1038532 512 32 25348 42598 1383861 737509 512 64 27308 66338 1575781 1248678 512 128 28823 77051 1619757 848872 512 256 25991 71678 1299295 550523 512 512 31687 99187 1657257 1647088 1024 4 10005 10690 577528 150945 1024 8 12865 20641 378117 585479 1024 16 20445 41130 867178 382223 1024 32 25999 31478 1022171 919928 1024 64 21368 63468 853394 1170033 1024 128 17640 56518 684478 1210598 1024 256 13867 24270 945443 634898 1024 512 20131 51186 1652033 1741104 2048 4 6731 6225 221237 544984 2048 8 8686 7995 239028 131375 2048 16 15746 9947 356106 444250 2048 32 19802 11863 1062347 1149954 2048 64 37020 69774 1193410 457037 2048 128 28560 39480 373657 480319 2048 256 23651 34094 1693997 1464907 2048 512 40668 50469 1807720 1519050 4096 4 4548 10673 313508 357788 4096 8 22281 13553 508012 298781 4096 16 11922 13673 528386 286451 4096 32 27072 34845 703925 387616 4096 64 26675 46155 1539855 998782 4096 128 17526 71811 503693 525204 4096 256 41071 56470 763895 849445 4096 512 43585 64904 1190747 952331 8192 4 13252 4846 183949 153127 8192 8 1706 13536 453146 421396 8192 16 16958 14709 556065 316085 8192 32 33394 27737 413570 365048 8192 64 22175 38334 322712 935472 8192 128 22780 36234 446602 362074 8192 256 23789 30859 578701 423954 8192 512 29819 48896 1043550 328048 16384 4 5629 6136 289859 216908 16384 8 10639 8858 351724 279781 16384 16 14190 15603 486114 306030 16384 32 15483 20397 332137 398889 16384 64 19171 21581 413978 348773 16384 128 17169 23058 447355 472406 16384 256 23876 26972 362519 535950 16384 512 26439 36544 583625 751592 32768 4 5076 6287 223079 182310 32768 8 10841 10321 411549 485100 32768 16 14882 17346 691496 539541 32768 32 21237 24911 747292 665287 32768 64