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: Thu Nov 13 19:47:45 2025 Auto Mode Machine = Linux oleg307-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-oleg307-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 9921 19405 293434 292156 64 8 10316 34803 515423 380864 64 16 14911 53872 673098 516414 64 32 12792 73306 874936 727850 64 64 7850 65173 1204796 2133730 128 4 6461 8490 275770 332467 128 8 14602 34839 364770 375485 128 16 5340 44915 677178 761728 128 32 20698 76056 637004 819893 128 64 15736 100072 1102844 913347 128 128 16029 127619 1359835 1858934 256 4 13187 11982 304365 329894 256 8 19298 32111 399486 358534 256 16 26987 39874 609455 547044 256 32 36508 88215 274417 219542 256 64 28126 119679 1267990 1098113 256 128 35814 132090 1230218 1391207 256 256 54853 151834 1195962 3236056 512 4 13085 18167 235397 261479 512 8 23036 19771 452215 327370 512 16 27435 48394 428485 625212 512 32 38214 91348 916237 853257 512 64 62761 118300 1143004 1108203 512 128 27459 67930 1233614 1201856 512 256 36435 88276 1668848 1506154 512 512 54572 169322 1723770 1999881 1024 4 10461 13440 215537 92812 1024 8 14012 30547 451113 426519 1024 16 43380 41549 634805 652650 1024 32 41484 82887 1060013 1052480 1024 64 42831 107280 1001903 1067654 1024 128 71659 140308 1254808 516668 1024 256 76212 146576 366502 1431748 1024 512 80942 159398 1640674 1079190 2048 4 7957 7180 147381 201614 2048 8 20078 24565 221163 358978 2048 16 21748 43057 862027 237397 2048 32 32199 45722 963342 957863 2048 64 51899 49517 325181 971513 2048 128 47506 56965 1202599 240602 2048 256 44238 63278 1608961 1153815 2048 512 54921 86420 1681397 1494732 4096 4 14101 10245 139628 238692 4096 8 16122 22233 175199 238722 4096 16 22158 41509 376538 520195 4096 32 27955 43852 351349 535485 4096 64 46592 51726 1239725 925848 4096 128 46003 75908 821342 773979 4096 256 52605 75373 1677262 1359940 4096 512 51458 70163 1728216 1455081 8192 4 10550 10352 245328 219301 8192 8 20456 18502 399941 212326 8192 16 24198 20328 591228 569003 8192 32 35240 42006 419867 763315 8192 64 45662 51923 578117 756209 8192 128 56834 67816 1434177 688284 8192 256 65044 82267 1537774 934099 8192 512 60642 65439 816343 532471 16384 4 4424 10132 111309 141254 16384 8 15313 20069 441557 352389 16384 16 26334 35694 252858 181721 16384 32 38985 56800 822694 499771 16384 64 57788 62159 1110711 877925 16384 128 59479 67638 799139 885665 16384 256 51493 84940 1345809 1097618 16384 512 61868 98220 1276725 990396 32768 4 10526 10933 247930 158943 32768 8 15054 17607 189153 229837 32768 16 24727 36629 396491 663389 32768 32 40445 42698 391002 765570 32768 64 47626 66102 1054280 1108943 32768 128 43736 61578 731673 885236 32768 256 56099 54763 1181347 1122924 32768 512 55503 66124 746813 555022 65536 4 8247 7902 101503 120051 65536 8