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: Sat Aug 22 04:10:34 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 3187 4150 90785 412466 64 8 3279 13496 842003 752329 64 16 4381 32018 877797 969761 64 32 1830 38212 1204796 1087638 64 64 5719 74860 1255511 1828508 128 4 5764 7440 643108 581781 128 8 7081 16387 163689 831319 128 16 7807 31425 805138 831319 128 32 8133 36782 1123617 1185654 128 64 3104 8656 1254941 1294270 128 128 5222 65037 352553 1997245 256 4 7777 7573 481109 490336 256 8 3596 19322 449112 844929 256 16 9507 28829 822913 966633 256 32 6261 11699 1226004 250709 256 64 5924 22816 1327564 290529 256 128 14614 39343 1479379 1652404 256 256 5051 51947 1778290 658411 512 4 2776 3096 543555 556515 512 8 8605 15825 867738 189844 512 16 6995 21995 689222 963945 512 32 11818 26887 1267097 1108775 512 64 15310 54237 1514652 189643 512 128 20269 61487 1040545 950295 512 256 24560 80250 1299295 1783912 512 512 9305 28944 1547395 571472 1024 4 3909 6314 282418 592588 1024 8 13895 8428 217877 382972 1024 16 8700 14433 1013010 136696 1024 32 13302 14058 571381 920125 1024 64 15726 41987 1322828 736725 1024 128 25551 42029 1095150 989440 1024 256 36402 39238 771116 373449 1024 512 21801 52993 1633188 874595 2048 4 5289 5140 373803 232174 2048 8 7326 10110 478393 229936 2048 16 17264 15925 971074 264047 2048 32 19360 38735 652641 517285 2048 64 27312 43267 769376 1242072 2048 128 31517 46917 771656 284446 2048 256 34630 65714 716317 750159 2048 512 32321 57004 867862 1640927 4096 4 6749 5017 270754 235728 4096 8 9025 7861 646666 407358 4096 16 9140 14215 266305 343365 4096 32 26761 23065 563888 371956 4096 64 14324 21795 510670 312243 4096 128 18527 32425 876890 696703 4096 256 34502 62425 484502 459762 4096 512 44447 69360 1105539 512574 8192 4 5434 4932 275935 250350 8192 8 2337 8453 289767 249673 8192 16 16329 11241 241723 376694 8192 32 16696 15847 509736 501684 8192 64 18704 26228 542552 445803 8192 128 21110 35644 1158852 642504 8192 256 19795 24625 501925 497240 8192 512 29894 41764 647175 360071 16384 4 4803 5169 253132 145284 16384 8 7975 9972 326511 394919 16384 16 15680 14881 626637 305170 16384 32 20843 24242 513914 571786 16384 64 23732 38811 768160 547540 16384 128 31949 43502 823769 431341 16384 256 31203 36040 810124 559255 16384 512 26106 58962 644431 751732 32768 4 5294 5788 269259 323602 32768 8 9479 9507 422430 355671 32768 16 13210 13791 442123 431401 32768 32