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 Jul 24 20:23:22 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 1596 4948 576282 529661 64 8 3654 12484 789967 69420 64 16 3857 4012 1017549 508587 64 32 1186 16619 1304314 1279447 64 64 3155 24548 196252 1828508 128 4 3998 5544 579270 401307 128 8 1532 15620 947186 702889 128 16 6239 15141 1067750 1007629 128 32 6524 51988 1377278 345965 128 64 5451 41705 1254941 1749872 128 128 6398 35684 1306873 2066432 256 4 6174 9506 568777 534517 256 8 5992 4770 185229 287958 256 16 8730 27732 227352 435983 256 32 14113 17970 1391207 972763 256 64 17791 70405 842278 1184092 256 128 17205 26066 1543163 1376935 256 256 5976 51262 1260547 1391207 512 4 5337 5056 434994 534358 512 8 7676 7232 186724 595232 512 16 17893 27791 548274 376434 512 32 14114 19665 520879 409293 512 64 9966 25384 873740 625941 512 128 17728 28950 538377 752761 512 256 21207 72987 281792 1556366 512 512 21245 81996 815353 1224470 1024 4 3900 7126 106180 99670 1024 8 10296 11334 665803 474539 1024 16 8008 10953 1081363 683062 1024 32 27558 34599 977950 131582 1024 64 12924 24599 705271 1101328 1024 128 17772 45513 503701 506433 1024 256 23193 65686 713117 1018777 1024 512 30303 101589 1516688 997019 2048 4 8190 5243 139271 330753 2048 8 9333 12789 400634 847400 2048 16 21374 42769 924165 366108 2048 32 20029 43243 656833 394218 2048 64 18476 33961 1123924 1128353 2048 128 26039 85319 1451540 810768 2048 256 17382 86377 883119 1335955 2048 512 28475 72788 1875611 434827 4096 4 5227 5309 311320 421490 4096 8 8747 7825 627740 518875 4096 16 20268 14805 514709 905786 4096 32 16923 22918 361203 517952 4096 64 21353 31909 1614527 349968 4096 128 18071 21023 616787 708775 4096 256 40979 48346 1777753 395596 4096 512 31957 58988 1821289 394261 8192 4 4763 9757 351917 330147 8192 8 2541 10130 387821 167919 8192 16 11440 14885 505961 642516 8192 32 20054 18066 561022 291644 8192 64 26391 23932 513346 590111 8192 128 19644 45112 791793 1021948 8192 256 64167 68513 935906 873919 8192 512 36650 44326 1909531 543384 16384 4 7596 6804 318556 188836 16384 8 10155 10980 509736 330822 16384 16 16837 16389 606383 627713 16384 32 22417 26579 346274 457143 16384 64 28332 26889 599793 576129 16384 128 33725 51056 798359 481330 16384 256 36671 47395 915456 755301 16384 512 31792 54520 457359 839129 32768 4 5467 5493 224056 241748 32768 8 10487 11033 397226 337480 32768 16 14723 15520 698855 670199 32768 32 17973 22548 634192 471652 32768 64 25687 22996 467920 1147621 32768 128