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 09:31:49 2026 Auto Mode Machine = Linux oleg427-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-oleg427-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 1966 5685 598110 627470 64 8 3118 6153 520419 639427 64 16 5913 30016 913649 524487 64 32 6385 27049 1105556 926260 64 64 5665 10269 1163036 1562436 128 4 5574 11742 481150 188256 128 8 5222 21058 595328 727658 128 16 4267 49863 976473 881842 128 32 6852 30381 895074 670413 128 64 6032 85505 1217930 598647 128 128 8797 101357 1406136 1561553 256 4 8673 11519 615393 442086 256 8 6531 18214 605332 632056 256 16 10935 31341 907792 823544 256 32 12892 50512 471600 479390 256 64 15501 53545 1280084 1108314 256 128 9478 106407 1422540 1201314 256 256 17707 67796 1591186 2223962 512 4 7220 5514 118385 164535 512 8 6227 9747 140461 440256 512 16 9866 14809 977103 319385 512 32 14436 61791 1007827 992456 512 64 10723 41881 1077618 519367 512 128 34062 83837 1014013 920953 512 256 28495 97693 453552 454705 512 512 28217 106422 1368865 1772135 1024 4 10943 11375 280555 501232 1024 8 8453 15873 238254 364697 1024 16 12333 25880 1008964 850521 1024 32 16445 13710 587803 116600 1024 64 11014 22461 839384 1082454 1024 128 17298 60034 573365 384963 1024 256 17928 30601 287561 499251 1024 512 18212 26717 1414304 869989 2048 4 4640 5236 445032 311536 2048 8 9013 11258 441373 307785 2048 16 9574 21802 406839 323784 2048 32 19651 17665 409672 720643 2048 64 17228 40177 1330781 320953 2048 128 24988 24459 1407538 264225 2048 256 23693 50850 1453505 1120990 2048 512 33986 54501 714588 1321974 4096 4 6525 9547 310067 339383 4096 8 15793 16398 409768 424018 4096 16 19494 1406 708395 624477 4096 32 14391 27995 351860 427872 4096 64 27334 26193 524595 668066 4096 128 30417 45393 608442 529265 4096 256 33014 51820 1048588 369008 4096 512 31672 60279 890249 771650 8192 4 6070 6085 237455 126706 8192 8 8026 8241 362154 282561 8192 16 13423 18501 635575 378103 8192 32 23150 18024 353485 165716 8192 64 19550 25234 655772 549397 8192 128 26109 26206 470882 380933 8192 256 31033 88779 624543 393222 8192 512 31395 48695 792652 648103 16384 4 6341 5348 211499 243875 16384 8 8357 11510 326596 301359 16384 16 16006 15482 497765 313390 16384 32 14261 29067 296087 334632 16384 64 24872 34318 819163 732931 16384 128 30269 37604 913983 686153 16384 256 31172 29959 694502 807563 16384 512 26531 37258 1264089 515514 32768 4 8544 6501 238960 214615 32768 8 6456 12926 252360 753913 32768 16