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: Sat Sep 5 12:29:54 2026 Auto Mode Machine = Linux oleg328-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-oleg328-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 2124 6763 640954 413101 64 8 1022 27280 901377 598110 64 16 2085 19667 1049372 789967 64 32 3197 57805 516414 955947 64 64 2886 47478 1255511 1638743 128 4 3878 5827 334123 499970 128 8 7450 14478 919605 761728 128 16 7026 24625 1142750 303178 128 32 4122 34362 1294270 1281909 128 64 6152 54890 978253 1406136 128 128 7840 68375 1487977 1997245 256 4 5345 9859 653204 258558 256 8 8640 12270 831194 795478 256 16 9946 40596 864661 886067 256 32 12155 39566 1463250 729540 256 64 7492 85388 1027695 735537 256 128 10028 34450 1479379 1208072 256 256 5726 42960 1325925 2000242 512 4 7124 5715 612376 523035 512 8 12280 9165 235294 542320 512 16 10246 24561 413549 1053304 512 32 15266 29105 1242896 1155924 512 64 18927 45441 420678 636894 512 128 11217 63178 1541840 1434711 512 256 17837 25609 562049 1467055 512 512 16587 61450 376500 2116152 1024 4 6213 9302 574285 579867 1024 8 7293 16990 803728 788819 1024 16 13715 22456 1108434 578461 1024 32 7813 23742 1321200 494481 1024 64 25650 68330 847667 680897 1024 128 33888 44074 996094 1233900 1024 256 33127 54424 572448 896689 1024 512 19124 30845 1521524 664053 2048 4 6336 6539 269506 137366 2048 8 11007 11914 323784 489376 2048 16 17700 12585 200625 677450 2048 32 23642 41523 875558 610609 2048 64 32337 51385 851516 673413 2048 128 18348 37161 892293 215487 2048 256 46758 65285 336071 510339 2048 512 25650 38789 799375 1601462 4096 4 5991 6546 338400 218304 4096 8 10653 12729 272230 331851 4096 16 14527 13842 619478 457814 4096 32 12760 30470 384855 1148018 4096 64 18234 20695 1447846 367721 4096 128 36061 49025 866322 538388 4096 256 26048 69091 634650 410826 4096 512 31532 74263 948335 700424 8192 4 6986 5696 210541 165011 8192 8 10297 11824 398596 496120 8192 16 2931 13424 337857 512160 8192 32 20443 18320 669991 509638 8192 64 23399 32720 676801 508951 8192 128 28095 44646 669613 723929 8192 256 38161 43116 685060 463557 8192 512 37793 45390 1060034 942038 16384 4 6167 6585 361031 317321 16384 8 12555 12727 244559 529182 16384 16 16646 18345 398482 443160 16384 32 17985 28278 957738 520059 16384 64 24167 26702 690434 500411 16384 128 25403 44053 410471 668758 16384 256 23456 45265 543508 398471 16384 512 36193 53957 985199 775905 32768 4 6115 6437 283546 357924 32768 8 9249 10462 543606 291276 32768 16 14006 15543 467887 265995 32768 32 20575 19372 711404 556010 32768 64 22818 26814 616764 489980 32768 128 23388 37760 873389 496522 32768 256