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 Aug 14 19:03:06 2026 Auto Mode Machine = Linux oleg128-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-oleg128-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 3487 5345 542506 566551 64 8 4412 40204 1279447 818885 64 16 9917 41369 821391 1183548 64 32 5424 84551 1452528 138812 64 64 5799 124806 1648808 2772930 128 4 6478 16439 1196221 853794 128 8 9800 23947 774922 1306873 128 16 7100 23849 1175271 445978 128 32 11447 70913 1266785 488594 128 64 12282 47231 1406136 1663139 128 128 8575 36292 1727352 1561553 256 4 7297 11945 568777 282578 256 8 8465 13970 148228 377041 256 16 10655 29350 1153561 1016025 256 32 21334 68413 859127 1241598 256 64 19583 33155 1463250 1197295 256 128 16254 58473 1610276 1591186 256 256 36326 67993 1224606 1805197 512 4 5735 8447 300818 472721 512 8 9598 12607 749608 1267845 512 16 18505 37187 393830 633699 512 32 19983 66640 807687 890404 512 64 31447 122316 1542947 2132967 512 128 11774 89226 988345 1410215 512 256 59265 119631 1585086 1026126 512 512 25072 185707 2560168 2597325 1024 4 7814 13390 373449 870871 1024 8 18900 16538 502170 348057 1024 16 24539 28569 642785 868581 1024 32 19250 37413 1210257 948157 1024 64 13272 67213 680897 1188159 1024 128 14838 59917 1011817 1276817 1024 256 24098 36173 1641301 1422266 1024 512 48548 97053 2398343 1071116 2048 4 6194 8040 342531 301710 2048 8 9417 10637 724717 800940 2048 16 17107 20207 271328 577249 2048 32 20050 22466 1290398 634467 2048 64 28074 41930 671046 1265868 2048 128 32167 42117 1535341 1334295 2048 256 28243 168157 2218586 1586379 2048 512 47394 77817 1052971 1529599 4096 4 5228 9930 206994 252980 4096 8 15460 6256 281920 234865 4096 16 10711 18986 1376834 288694 4096 32 16928 40295 1452007 345103 4096 64 24354 36935 968818 425298 4096 128 36644 55438 999305 784225 4096 256 54934 38935 704387 536622 4096 512 40513 51714 487499 646155 8192 4 5897 6765 191962 275426 8192 8 9706 10239 502851 562676 8192 16 10898 16905 903020 352025 8192 32 15812 32261 1120055 1011836 8192 64 27540 40418 1072106 669769 8192 128 31182 50263 990685 694307 8192 256 31184 45042 729617 391306 8192 512 42537 65233 922116 581404 16384 4 4908 5393 306494 261662 16384 8 7808 10723 263883 360800 16384 16 20086 21748 843061 559141 16384 32 14594 25242 940952 400891 16384 64 19090 29857 677053 1153963 16384 128 42023 38293 1238684 802705 16384 256 37597 69216 1115996 567035 16384 512 36336 61588 1048307 1100342 32768 4 4716 5100 225160 289005 32768 8 12261 12892 324323 425774 32768 16 17081 23434 448569 581819 32768 32 22727 30821 495906 478875 32768 64