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 Apr 28 20:51:26 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 5251 10226 610350 441646 64 8 5160 26491 801764 673098 64 16 4295 22161 1033216 760859 64 32 7238 42834 1255511 855419 64 64 10357 83760 1255511 1991276 128 4 6645 10687 377597 649331 128 8 6566 19437 847059 699227 128 16 20266 32412 434078 515822 128 32 10789 46848 1111981 1040839 128 64 7871 91431 1363288 145817 128 128 13840 109681 1377278 1852520 256 4 4762 9662 247588 853662 256 8 8820 8646 797843 104532 256 16 12000 19011 1190657 907792 256 32 19285 52319 1094754 762164 256 64 15452 65592 805021 358534 256 128 22757 172134 1306564 1132871 256 256 24987 105654 714967 1907837 512 4 9124 13877 713021 533827 512 8 13881 28192 1163439 782951 512 16 17175 50567 986529 494720 512 32 34662 44494 1143004 1207261 512 64 8560 97414 1276891 1117430 512 128 22153 28836 1410215 1240025 512 256 21902 110993 1441452 1472083 512 512 18262 71062 1599251 1210664 1024 4 9334 9809 575593 586519 1024 8 11668 27376 908640 485098 1024 16 43065 36856 1096548 284118 1024 32 33155 52459 811932 167950 1024 64 25032 65052 602649 1067920 1024 128 64957 72122 870694 723082 1024 256 28311 166318 1537868 1016847 1024 512 57460 93344 383246 466955 2048 4 13226 9528 315321 455197 2048 8 18854 16397 341048 275753 2048 16 35751 44434 858323 1379952 2048 32 26167 39943 641623 441192 2048 64 40229 31624 963774 1261036 2048 128 44567 60845 1599971 1389551 2048 256 46457 77885 602895 1257160 2048 512 63620 85134 1638423 1471180 4096 4 6287 9286 511872 404662 4096 8 16267 17979 623050 856731 4096 16 28107 34694 419289 483588 4096 32 24798 36561 716191 353649 4096 64 31486 66739 1808253 491530 4096 128 36309 41821 936906 776638 4096 256 56547 65144 1836671 1586350 4096 512 43520 109923 800299 1448335 8192 4 10075 14051 230502 473060 8192 8 20170 16243 604352 480980 8192 16 24037 26462 777813 1001076 8192 32 35503 31321 917561 467843 8192 64 35007 63363 425798 678257 8192 128 50853 86007 966252 783327 8192 256 53293 59685 1910805 1408081 8192 512 3739 96982 1073916 1716716 16384 4 11202 12638 293978 332453 16384 8 17295 20538 1031811 596975 16384 16 30461 33800 1046901 841585 16384 32 51165 56320 628121 921224 16384 64 52418 89285 1282491 1103452 16384 128 67178 107780 773956 884092 16384 256 57525 78280 1112437 1053433 16384 512 62661 112575 1379582 1195374 32768 4 12617 14285 327833 372973 32768 8 21037 26082 1267865 882683 32768 16 30509 34770 904841 977769 32768 32 46783 51945 1066701 752287 32768 64 54697 67977 1430049 891790 32768 128 64656 75029 1566205 845519 32768 256 64547 84077 1313510 1421412 32768 512 65163 94415 759046 865480 65536 4 9639 10753 401305 330362 65536 8 13563 17648 561643 498850 65536 16 30681 34200 750286 800439 65536 32