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 Jul 30 01:19:33 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 4 943 2484 615952 633392 64 8 3138 5506 608965 603489 64 16 1456 10382 942521 592827 64 32 1425 4683 998622 889431 64 64 997 36320 1183548 125683 128 4 1944 3492 604036 465304 128 8 2890 4466 1007629 776042 128 16 1854 9694 1085013 1076312 128 32 3040 7708 1040839 1152564 128 64 3507 10023 687585 1057236 128 128 2921 2776 940549 1471662 256 4 1408 1514 556398 592636 256 8 1822 4641 790209 152850 256 16 2769 7655 901693 879535 256 32 3305 6501 1048775 917880 256 64 2888 11539 1126926 306975 256 128 6129 11960 532133 1415041 256 256 5184 24741 1489641 1985448 512 4 2321 2510 306048 344545 512 8 7686 15322 632765 251349 512 16 4146 8951 304400 779540 512 32 4578 8462 1139970 699550 512 64 4492 12787 1057974 223003 512 128 19702 38047 821907 1182661 512 256 15907 66545 1523247 496665 512 512 8639 27331 140085 236070 1024 4 1738 2511 65302 64172 1024 8 4500 3860 780504 223721 1024 16 4980 8230 554704 910181 1024 32 10622 10220 344070 365721 1024 64 6973 10000 1241031 1074599 1024 128 13055 25724 774592 172075 1024 256 13577 26895 275781 1385560 1024 512 34578 86770 1541732 1625769 2048 4 2642 3412 226272 344896 2048 8 5823 6448 178976 125207 2048 16 10836 7596 220714 354080 2048 32 11134 11037 1104558 149325 2048 64 31049 51592 487266 732504 2048 128 13396 14115 169103 522730 2048 256 13560 23320 238471 150137 2048 512 13313 27677 195271 217942 4096 4 3194 2333 129830 115879 4096 8 6074 4408 199689 209544 4096 16 6617 12385 192545 142321 4096 32 6296 8457 171653 269560 4096 64 19100 11058 372869 346299 4096 128 13139 12357 342618 318607 4096 256 18505 22643 1405213 314064 4096 512 16187 22410 361873 178756 8192 4 2369 3522 172379 135691 8192 8 4368 4516 267931 155195 8192 16 6106 9597 393015 247895 8192 32 12344 22555 491275 481095 8192 64 26594 24252 1057717 366711 8192 128 18812 29257 362973 472813 8192 256 13532 22199 433414 212706 8192 512 18330 21263 350821 649537 16384 4 2665 3344 162513 175445 16384 8 5359 5495 443194 453660 16384 16