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 18:20:15 2025 Auto Mode Machine = Linux oleg122-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-oleg122-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 2958 4126 274809 189867 64 8 3299 12357 507625 86042 64 16 8958 53517 633392 615952 64 32 4313 68674 877797 874936 64 64 2722 101919 1045286 1526887 128 4 9655 19330 310724 237468 128 8 9767 31188 479432 345965 128 16 3732 53093 688467 531131 128 32 12869 78768 1142750 600657 128 64 5679 43524 1185654 1217930 128 128 7713 87313 231030 1440082 256 4 11627 9628 252241 221444 256 8 6565 32233 423098 406904 256 16 12657 52043 475779 144557 256 32 10663 63430 834424 842278 256 64 23421 101508 1224606 1053922 256 128 20656 130676 1178892 340891 256 256 29554 132514 1591186 2305128 512 4 10345 7458 290561 72521 512 8 11272 18428 520879 363130 512 16 22759 14788 679840 579179 512 32 28292 40784 922139 891884 512 64 19046 37588 1216149 1001715 512 128 40728 87638 1296159 1163439 512 256 16901 146069 786391 228363 512 512 17286 130818 1711407 1778004 1024 4 9271 17465 236327 212046 1024 8 12869 24043 334217 132434 1024 16 28818 23225 627020 765344 1024 32 29780 51879 593981 857654 1024 64 30360 47652 1279861 539514 1024 128 39297 82747 1395010 1537868 1024 256 53968 114771 1495042 1383774 1024 512 38260 133837 1488307 1718120 2048 4 9289 15538 119172 92074 2048 8 19037 17723 343105 443859 2048 16 27762 24981 180613 392955 2048 32 31973 60647 889613 717333 2048 64 33718 108022 1028142 840682 2048 128 72245 66952 1145965 849411 2048 256 31627 57803 378081 658091 2048 512 21726 68426 1279252 1115459 4096 4 15574 9693 220892 258325 4096 8 7129 15709 260061 91838 4096 16 27950 43561 321679 661710 4096 32 32567 61179 655025 661940 4096 64 34112 43635 1007864 1043303 4096 128 22832 47738 1235268 1248736 4096 256 33686 54035 1659601 1318303 4096 512 30357 45829 1441771 509066 8192 4 4107 6851 146186 84304 8192 8 1982 18311 486483 237854 8192 16 18322 14862 548949 505581 8192 32 31192 27348 405205 380351 8192 64 18798 16971 890245 504246 8192 128 18780 27377 377804 406269 8192 256 22530 92625 496421 624826 8192 512 29645 58621 725534 968212 16384 4 6177 7021 94921 88456 16384 8 11016 15987 271780 263697 16384 16 21196 19840 362301 246039 16384 32 30264 38388 216008 248629 16384 64 24767 36325 410925 253484 16384 128 28528 51604 427836 346223 16384 256 43473 51751 1173712 1089215 16384 512 47586 64598 1322474 620184 32768 4 8905 8802 225748 135513 32768 8 11188 12260 219545 174629 32768 16 16149 21110 488206 300376 32768 32 25402 28801 782330 637883 32768 64 21044 32660 663159 462648 32768 128 34298 46408 615614 421231 32768 256