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 Aug 11 16:31:19 2026 Auto Mode Machine = Linux oleg122-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-oleg122-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 3116 10051 541412 586352 64 8 4671 12181 760859 809014 64 16 4656 26016 520419 889431 64 32 3821 40865 193983 889431 64 64 4615 49419 1392258 1780008 128 4 5423 11932 667081 47214 128 8 4498 17248 1000121 753179 128 16 4347 14214 1102844 700139 128 32 5335 16017 1266785 976473 128 64 6286 39937 2132084 1561553 128 128 7527 26992 1521718 2098744 256 4 6906 6792 269188 593947 256 8 2514 6717 196303 792543 256 16 3633 12010 1008392 658008 256 32 13381 44732 1032636 864661 256 64 12529 46058 1213534 1180188 256 128 12750 35904 664935 1398455 256 256 15292 52663 439013 1985448 512 4 3816 5366 688338 810124 512 8 9910 12204 738777 444079 512 16 13026 32828 1123275 646480 512 32 19487 39240 1422357 986529 512 64 26094 57333 772252 1306409 512 128 24139 65759 1575781 1395552 512 256 16510 55382 1594501 1551867 512 512 28528 52277 1242896 757274 1024 4 8766 11402 388586 434986 1024 8 6649 10187 232943 822506 1024 16 19246 10359 1102176 164496 1024 32 12185 33189 958953 720172 1024 64 19314 40359 1484193 487576 1024 128 18379 25393 849176 1380217 1024 256 13256 36927 1638171 1530742 1024 512 25820 55420 1610528 636781 2048 4 5757 9975 631528 383516 2048 8 7887 9555 444917 679056 2048 16 15105 16897 665793 302336 2048 32 23294 32815 338015 357544 2048 64 20441 38089 1445191 471798 2048 128 57336 59026 2019827 1074573 2048 256 38818 68794 984090 637008 2048 512 19722 54885 534605 1549185 4096 4 5859 5349 281144 280548 4096 8 13509 7360 359796 460218 4096 16 10790 20862 320730 264717 4096 32 24869 30558 409026 424374 4096 64 24812 45998 777693 696844 4096 128 34958 32725 1549717 1292904 4096 256 43165 67670 765905 757229 4096 512 26045 45001 573986 1513137 8192 4 5072 5743 321760 376368 8192 8 7832 8154 590162 264129 8192 16 16469 16696 368280 411553 8192 32 17682 30524 952114 771577 8192 64 27726 28848 593065 385922 8192 128 38045 47709 1313656 876908 8192 256 30307 36008 914289 941806 8192 512 31715 49255 571540 1170099 16384 4 5917 4181 262240 193856 16384 8 8942 8552 281018 241459 16384 16 12547 16588 312486 479945 16384 32 18563 23902 510137 621430 16384 64 22356 38772 926690 739684 16384 128 32955 31468 1507806 569880 16384 256 26228 38388 460936 672133 16384 512 31630 33968 567686 337404 32768 4 4939 5127 225229 181324 32768 8 8061 10309 556503 430173 32768 16 12812 15928 566910 485847 32768 32 18643 21567 653541 719572 32768 64