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 Jul 7 12:58:08 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 1632 4128 351444 484710 64 8 5148 6001 647135 679917 64 16 3964 34799 703068 435202 64 32 3004 14286 1279447 129816 64 64 4249 37734 1124074 647135 128 4 4401 11860 1065630 540217 128 8 6996 18283 847059 830034 128 16 6725 16736 1085013 853794 128 32 6501 25024 1048974 948860 128 64 5138 58369 1229084 1294270 128 128 5049 69788 1440082 1833539 256 4 6763 7707 608074 565185 256 8 8627 17884 439193 606700 256 16 12234 30418 368375 412849 256 32 8677 46470 498995 958864 256 64 15744 52182 980760 1118707 256 128 13861 39862 1842366 1897721 256 256 18357 61628 1639786 1829808 512 4 4574 9114 457514 86676 512 8 8060 15085 641651 461248 512 16 9886 22523 1199171 823167 512 32 7953 24872 1125040 722133 512 64 17671 72582 742096 81049 512 128 11868 52635 1309596 258334 512 256 26307 76076 704368 310114 512 512 12298 59321 262182 747521 1024 4 6735 3559 591935 531108 1024 8 11961 5839 794951 238757 1024 16 6343 13417 976172 658959 1024 32 10623 21662 1078919 842017 1024 64 21843 47050 519041 600627 1024 128 10298 38686 553774 1181297 1024 256 46955 47497 895007 466701 1024 512 24665 67711 718605 182984 2048 4 4981 4441 135298 164906 2048 8 9852 11707 778087 230189 2048 16 15072 18967 702606 535972 2048 32 29251 31701 658747 514465 2048 64 17090 38558 1338662 312909 2048 128 26796 35087 1322992 693306 2048 256 24013 55453 981840 1303518 2048 512 30366 74700 1473451 936865 4096 4 7067 6751 415506 296635 4096 8 13411 10351 455931 533473 4096 16 19462 12069 680854 559553 4096 32 11324 17562 641714 366763 4096 64 22344 16887 1347355 281223 4096 128 21838 36521 732623 455472 4096 256 18708 41206 1932101 562724 4096 512 42578 44423 629188 729357 8192 4 4565 4707 343983 225357 8192 8 2488 8379 412799 369591 8192 16 11252 20769 611657 490952 8192 32 19936 23478 657252 557093 8192 64 26650 39561 774359 536688 8192 128 26005 41508 1092560 807024 8192 256 39631 45473 841082 416957 8192 512 23719 52667 986164 788450 16384 4 5241 5549 239496 214627 16384 8 8389 8601 358614 200396 16384 16 13914 12988 268898 255513 16384 32 14599 20229 1055731 659661 16384 64 21031 24364 647717 486675 16384 128 16340 25775 676833 705511 16384 256 40866 51734 1461687 723806 16384 512 38395 31848 283107 468314 32768 4 4574 4809 221293 192361 32768 8 7142 8136 390559 374555 32768 16