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: Wed Dec 3 14:51:06 2025 Auto Mode Machine = Linux oleg443-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-oleg443-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 5097 20107 148816 288390 64 8 10893 31525 412466 496362 64 16 14759 51525 98011 538156 64 32 11810 71491 1033216 394870 64 64 20592 83318 1336792 1330167 128 4 11935 16550 236215 253503 128 8 14568 34124 443033 355589 128 16 19202 45310 901083 809997 128 32 25236 75120 947186 1032829 128 64 24362 101261 1065630 1526043 128 128 26419 123566 1642783 1467639 256 4 12367 15534 298360 254694 256 8 22759 33714 393340 396243 256 16 31315 57041 591005 737558 256 32 18246 91821 1028679 852984 256 64 46318 115520 1237306 1123389 256 128 20625 121151 1292410 1461259 256 256 41283 160913 1463250 1778290 512 4 7178 14964 275714 278575 512 8 23304 34089 356085 357806 512 16 33051 29494 700463 614654 512 32 54099 50220 760762 811655 512 64 42394 41518 899731 416921 512 128 40599 114950 1319250 1309596 512 256 43644 25302 1645826 1438555 512 512 31856 50088 1574625 1795846 1024 4 5760 6738 66605 286506 1024 8 11667 20595 387849 403442 1024 16 38590 42972 227960 597119 1024 32 37832 30924 773476 797460 1024 64 32239 110892 520551 1158358 1024 128 65373 93815 1424152 1194770 1024 256 46916 139929 1720874 1484193 1024 512 28006 94266 1367037 1333507 2048 4 11533 11918 210481 244248 2048 8 12374 11106 319556 343105 2048 16 24637 21967 420543 365905 2048 32 40326 52737 924165 323735 2048 64 25289 45777 1425288 1068957 2048 128 40571 68453 1043885 1092894 2048 256 28869 70088 1606254 1409617 2048 512 71937 82577 955732 1077269 4096 4 7574 11146 286112 100670 4096 8 19520 18220 402321 265889 4096 16 30224 31217 523444 649330 4096 32 47150 41306 866671 682802 4096 64 65545 59470 1279139 1017655 4096 128 48791 50337 665685 805515 4096 256 55006 65679 1745956 1146027 4096 512 43968 65385 1699663 786955 8192 4 9270 9546 255258 201015 8192 8 18515 20173 303620 372633 8192 16 31124 31317 520288 391324 8192 32 41099 42087 742627 483845 8192 64 35111 68413 477306 582636 8192 128 45507 56177 993090 1104466 8192 256 42595 51533 604533 944317 8192 512 64635 83245 1474173 951903 16384 4 10991 12513 205727 244496 16384 8 18845 23312 356640 423196 16384 16 30989 37587 591268 600323 16384 32 47772 51235 813307 417321 16384 64 49348 75373 907106 687367 16384 128 55461 90085 1323212 985496 16384 256 60223 87946 798007 1196957 16384 512 62812 78252 666915 1397112 32768 4 11459 13095 229349 203593 32768 8 21013 27190 471081 331649 32768 16 35866 51861 573247 657622 32768 32 58986 64476 843603 878098 32768 64 62368 94393 1044862 850168 32768 128 86516 107194 1432494 1027920 32768 256 81773 129520 1678176 1111607 32768 512 93315 117339 1319108 1432554 65536 4 17574 17325 280310 273497 65536 8 23931 26079 410297 425309 65536 16 37217 50497 648800 554422 65536 32 58706 75239 959126 744880 65536 64 72904 98909 1227819 912579 65536 128 76001 108916 1424047 1253582 65536 256