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 Aug 27 07:03:58 2026 Auto Mode Machine = Linux oleg634-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-oleg634-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 2108 9492 470274 454354 64 8 4570 18401 703068 771797 64 16 3604 23155 1124074 314030 64 32 3713 59259 1232453 463774 64 64 5433 28292 1017549 1722886 128 4 3099 8919 592699 179807 128 8 7627 11924 662962 100862 128 16 6208 27233 1040839 766076 128 32 4817 41979 1093856 1040839 128 64 7104 73055 1048974 1096089 128 128 6843 63207 636249 1827299 256 4 6355 4296 303333 309185 256 8 9740 15849 431601 387379 256 16 10304 15102 927393 76007 256 32 8297 22110 541253 934659 256 64 8144 44693 1241598 548161 256 128 16044 76440 1514860 1398455 256 256 5877 68265 927393 2019049 512 4 8865 7777 211225 524697 512 8 12247 12041 522399 641651 512 16 20010 24600 870905 167748 512 32 9863 15171 613250 464541 512 64 13498 27438 490875 507462 512 128 23149 68450 1340664 1204552 512 256 22184 67885 1496706 1510391 512 512 28555 71959 967855 1635797 1024 4 5335 5998 477388 160626 1024 8 11509 8490 390991 167479 1024 16 21632 25149 608455 205906 1024 32 11700 13930 189032 108508 1024 64 10944 24640 1099636 1157109 1024 128 18187 70938 1393200 1250425 1024 256 20580 76196 1232484 1025099 1024 512 12806 29942 699414 1102176 2048 4 7961 11361 197511 270108 2048 8 14230 14221 788660 304490 2048 16 11882 18960 204898 588682 2048 32 31289 41438 1186650 296472 2048 64 19671 24934 815928 720160 2048 128 23126 31175 1003871 775418 2048 256 36542 89275 1399740 1499428 2048 512 40225 48149 834881 441850 4096 4 6542 3539 182264 184355 4096 8 9545 9019 244787 469461 4096 16 19418 30347 449325 345916 4096 32 24684 21905 445653 584392 4096 64 35262 42055 819853 387730 4096 128 38593 32326 754866 504314 4096 256 51190 55108 1789419 802992 4096 512 29063 49560 1134298 886025 8192 4 5561 6868 146042 179323 8192 8 7985 2522 228355 318346 8192 16 13386 19237 300389 342348 8192 32 15322 21968 770435 714342 8192 64 22764 22137 381292 369138 8192 128 35082 43875 904089 735442 8192 256 29184 37735 536939 865227 8192 512 29290 51977 584222 454633 16384 4 5735 6549 285515 379021 16384 8 9575 12581 282180 436652 16384 16 15882 17515 328711 250566 16384 32 13533 22359 552261 532054 16384 64 16735 22175 623465 435769 16384 128 25968 48111 820797 684124 16384 256 43242 69961 692765 504337 16384 512 33113 52870 713584 339684 32768 4 5815 8494 255152 214102 32768 8 8091 13039 439036 263860 32768 16 15482 19224 323395 198115 32768 32 22823 22991 1243613 1101443 32768 64 40231 51282 569294 688403 32768 128 30526 33689 337595 415965 32768 256