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 Feb 24 16:41:18 2026 Auto Mode Machine = Linux oleg227-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-oleg227-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 6217 19625 542506 491815 64 8 9673 32114 679917 467002 64 16 7711 50008 769584 718114 64 32 8771 61303 1143223 1392258 64 64 8924 82070 1210227 1638743 128 4 7812 8797 819893 606767 128 8 14284 35885 780556 692017 128 16 15650 59095 1618028 1000121 128 32 13495 61540 1455701 1114289 128 64 21091 92487 1827299 1152564 128 128 22506 92551 1451764 1152564 256 4 13851 11253 611189 526652 256 8 9245 23272 575175 802014 256 16 23453 58916 984356 883152 256 32 28113 38146 1197295 1400278 256 64 27922 92685 1911233 931416 256 128 24615 131219 1325925 1439707 256 256 36457 90551 1775350 3511189 512 4 16082 19594 667582 497010 512 8 19348 41686 573303 514637 512 16 22607 39868 925717 762924 512 32 47214 83962 1657257 917412 512 64 24965 101849 1476130 1015932 512 128 29177 49569 1760512 1376763 512 256 48498 113253 1230786 2205248 512 512 22140 121582 1459080 1497750 1024 4 17813 20719 745808 866478 1024 8 18555 25098 1126753 741559 1024 16 27281 40533 686776 1015885 1024 32 36694 94204 1099918 476752 1024 64 38455 118849 1302766 643555 1024 128 37049 102532 2004366 829175 1024 256 59483 76343 1216082 1154311 1024 512 59666 116417 1554004 1512415 2048 4 11577 14837 226672 353163 2048 8 24421 34907 581508 487626 2048 16 41423 56830 1434331 321807 2048 32 32144 65302 904984 1033213 2048 64 57357 89674 1314489 589692 2048 128 39348 112695 1068824 1277540 2048 256 46358 131661 1171598 1793378 2048 512 78200 126015 1727034 1479797 4096 4 16376 16020 825486 613899 4096 8 25003 35675 264461 356792 4096 16 36665 56707 1016632 1163332 4096 32 53611 68133 1031278 582727 4096 64 58833 102553 1298671 974755 4096 128 76937 119566 1769331 1644981 4096 256 85852 103360 1585179 1389866 4096 512 58712 113095 1358972 1321344 8192 4 17219 20436 361994 493973 8192 8 31497 32035 960713 758094 8192 16 42333 48199 998544 990570 8192 32 47910 76829 1352915 1486739 8192 64 58192 61337 616077 1241014 8192 128 60659 62032 754830 613459 8192 256 78981 68387 1354943 1389911 8192 512 70499 98442 806381 1153831 16384 4 14035 15824 653296 625559 16384 8 22415 26572 476402 467486 16384 16 29236 37777 983662 570732 16384 32