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 Nov 16 21:32:00 2025 Auto Mode Machine = Linux oleg224-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-oleg224-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 3623 18714 275939 18177 64 8 2778 21783 342040 318502 64 16 2421 53560 735831 84418 64 32 4933 79801 1232453 811459 64 64 7872 86125 1232453 821391 128 4 9982 19178 275911 141140 128 8 5873 14296 139562 58855 128 16 13691 55002 511887 579270 128 32 21185 73697 140807 853794 128 64 21004 91183 1185654 1085013 128 128 9269 112086 1440082 1471662 256 4 2918 6313 286345 262284 256 8 9567 30754 357103 304020 256 16 15331 43396 719277 627623 256 32 8422 16196 1243036 873098 256 64 29338 104573 1173737 1008392 256 128 7838 57694 1237306 1254656 256 256 9015 119453 1219045 1829808 512 4 4034 15027 271050 156046 512 8 15897 24906 210624 192706 512 16 12731 58668 629058 537838 512 32 25410 85360 988345 796306 512 64 20137 117164 1196499 1082507 512 128 43010 141946 1316823 1166599 512 256 33298 152511 1458090 1547395 512 512 37627 163894 1635797 1947291 1024 4 15005 9125 116285 229802 1024 8 14725 27379 472972 210096 1024 16 24279 17446 119027 639150 1024 32 45042 41203 629409 913471 1024 64 17326 43895 790707 401256 1024 128 29021 28333 226745 1242826 1024 256 35883 125628 1264413 1361404 1024 512 16401 39507 1609925 1370965 2048 4 10467 8090 97090 230343 2048 8 15544 20242 283413 206847 2048 16 20112 12115 669686 140669 2048 32 14032 46384 1166982 601797 2048 64 40575 55985 673677 406435 2048 128 24494 85736 1408461 1209712 2048 256 45290 80002 1620190 1356204 2048 512 45267 90495 1073365 1240458 4096 4 10695 12423 271276 217500 4096 8 19521 18570 388537 225401 4096 16 21127 33854 570233 345916 4096 32 40187 31839 533324 509957 4096 64 53935 68510 838991 1015130 4096 128 31551 59403 1095458 510852 4096 256 68836 66712 1637611 1280378 4096 512 38597 44771 1572412 1543313 8192 4 12015 11544 225128 247949 8192 8 18037 2911 244968 224506 8192 16 18024 34105 666884 448432 8192 32 56705 40643 279627 622438 8192 64 31605 51338 809801 490161 8192 128 56305 46236 291468 913171 8192 256 64008 84869 703116 1324288 8192 512 60048 59533 1265001 1048774 16384 4 8834 8159 122099 99930 16384 8 13704 15347 386314 361733 16384 16 14040 20742 677895 464239 16384 32 25630 30495 873851 706817 16384 64 31186 37823 1063212 958794 16384 128 35714 48703 797276 358646 16384 256 35580 49297 439462 445738 16384 512 41514 54782 484718 374456 32768 4 7003 8117 148851 97374 32768 8 11423 12937 151002 335262 32768 16 16711 25337 695341 513838 32768 32 21281 31642 313755 349969 32768 64 33264 45253 409732 262343 32768 128 41825 40635 1131997 1090414 32768 256 46099 58308 464624 946941 32768 512 45457 67507 554599 702589 65536 4