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 Apr 3 01:38:53 2026 Auto Mode Machine = Linux oleg127-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-oleg127-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 4 995 2934 520419 598110 64 8 2231 6226 243411 615952 64 16 3677 19423 12366 1066042 64 32 3824 83996 647135 582535 64 64 2730 70496 1163036 239716 128 4 3442 5967 650117 571257 128 8 3718 15423 809997 39179 128 16 8372 7257 859260 753179 128 32 3943 38847 175803 883293 128 64 5263 34033 1162547 1142750 128 128 10768 61803 1684006 1778862 256 4 3904 5621 600928 550691 256 8 3336 15262 934659 690151 256 16 7741 33237 1173737 836374 256 32 8080 8372 1089202 876662 256 64 8422 68339 1208072 1058076 256 128 11659 45126 1153561 1463250 256 256 19085 138604 1461259 106852 512 4 5502 7525 244984 125489 512 8 9014 10858 480764 226150 512 16 11525 19666 804962 308776 512 32 11259 21630 1267097 372645 512 64 7860 36283 1344020 1174254 512 128 12472 40223 1413929 765371 512 256 14531 92469 1518938 1620980 512 512 18046 73383 347556 515131 1024 4 4819 2979 276082 379554 1024 8 14416 16894 632840 329045 1024 16 11705 14259 248367 330209 1024 32 16963 39396 626288 869989 1024 64 11985 42183 623289 96932 1024 128 36074 38657 327990 594969 1024 256 43957 33783 1151834 1548960 1024 512 24358 87335 282641 433887 2048 4 6844 3788 144306 180902 2048 8 10723 7541 281509 327475 2048 16 21654 23453 643257 255198 2048 32 15502 19904 1299574 1119821 2048 64 19332 21303 618167 1198237 2048 128 28019 39957 1358993 523782 2048 256 23376 34039 932593 131594 2048 512 13389 87991 691687 594138 4096 4 3933 4973 284817 353402 4096 8 7794 11471 320449 674360 4096 16 9511 16065 706095 217340 4096 32 17751 24942 1374081 302266 4096 64 18884 28490 314570 471989 4096 128 19050 38696 992264 427415 4096 256 24330 55906 723551 813987 4096 512 37553 53427 582056 723673 8192 4 2935 3909 360785 224911 8192 8 8671 10676 543487 338890 8192 16 15713 12830 333131 698201 8192 32 16849 25163 371116 401254 8192 64 22343 38059 957447 885998 8192 128 27999 38384 616033 599533 8192 256 24333 29307 577758 813733 8192 512 33609 51693 466016 356174 16384 4 5408 5850 236526 192759 16384 8 10150 10385 582478 293382 16384 16 12814 15971 365690 362557 16384 32 25079 34876 489556 384331 16384 64 28159 39042 622584 726461 16384 128 31600 43168 749289 665661 16384 256 31985 48833 871578 638830 16384 512 38635 37045 529953 484117 32768 4