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: Sun Sep 6 22:12:29 2026 Auto Mode Machine = Linux oleg657-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-oleg657-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 2706 8567 566551 304761 64 8 3263 27197 598110 799377 64 16 3586 22842 771797 552557 64 32 4065 45330 1163036 877797 64 64 4436 46307 1421755 1518251 128 4 4867 8812 434078 558771 128 8 4790 9230 927549 718889 128 16 6564 29143 1172704 312897 128 32 6096 38519 1684006 547377 128 64 6332 62808 1406136 1057236 128 128 6626 48142 192785 1772988 256 4 8055 6982 667000 473263 256 8 5153 13493 476624 89323 256 16 11517 29826 797250 711178 256 32 11232 42924 1153561 1027695 256 64 11824 37869 1312954 999940 256 128 13593 75473 1686137 203830 256 256 12048 71607 1696795 1970871 512 4 8117 9809 230001 319622 512 8 9705 16435 358283 151116 512 16 12809 26845 663252 265291 512 32 17706 56011 1057974 859060 512 64 28074 77751 1227971 1073309 512 128 26102 76565 704368 1227269 512 256 22342 74568 346435 401864 512 512 13621 65868 1395552 1961520 1024 4 7464 13784 367003 518477 1024 8 9062 15158 442743 365566 1024 16 11895 20986 350557 414900 1024 32 29160 43268 772225 1063425 1024 64 22220 36149 182300 736599 1024 128 18802 56486 1065535 1291406 1024 256 36417 94927 1521524 1404591 1024 512 37822 87149 925877 282400 2048 4 8200 7542 135236 251876 2048 8 12625 13563 358918 350026 2048 16 17816 26412 1013345 729580 2048 32 23670 32256 763562 580683 2048 64 18100 37552 1436250 1183055 2048 128 30104 48288 744180 625732 2048 256 19053 55426 720643 712337 2048 512 31916 48548 866986 580683 4096 4 12247 7871 372327 279552 4096 8 9933 15569 626024 206390 4096 16 23447 38095 1041974 421139 4096 32 27058 52619 500786 322694 4096 64 40029 46993 1813981 789995 4096 128 41866 72492 521331 487568 4096 256 39283 57740 869655 364475 4096 512 40845 56565 541801 1014890 8192 4 12964 10468 514153 222143 8192 8 14272 19332 622867 476221 8192 16 26277 24392 525090 1108385 8192 32 23986 28844 902996 878410 8192 64 33731 48661 1081862 596732 8192 128 42297 67168 760006 591656 8192 256 43061 63007 1037751 682895 8192 512 35312 72837 1181242 656725 16384 4 8917 2184 375237 465151 16384 8 16609 15176 475104 494744 16384 16 22948 24113 570476 386768 16384 32 28009 28768 673734 539997 16384 64 40991 70599 612485 642707 16384 128 43481 62113 1338209 1062719 16384 256 47598 83333 1245757 924645 16384 512 53631 85837 1151932 764851 32768 4 12031 12325 482228 320196 32768 8 16073 18919 580210 501899 32768 16 24236 28449 771211 613323 32768 32 30721 35988 1017449 574885 32768 64 38403 56735 758167 589945 32768 128 54443 56797 1268650 886338 32768 256 42699 57677 1329662 833070 32768 512 47488 62786 1117746 891593 65536 4 9389 11159 418846 416874 65536 8 16966 16227 485808 369696 65536 16