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: Fri Aug 14 14:47:27 2026 Auto Mode Machine = Linux oleg610-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-oleg610-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 4131 3531 640954 63931 64 8 3228 14121 901377 363829 64 16 3874 7418 983980 58715 64 32 5756 24234 405610 1017549 64 64 5264 72553 1143223 1562436 128 4 7268 12634 615814 208509 128 8 7490 7159 428193 90583 128 16 8223 31951 1076312 883293 128 32 12633 53177 1057236 948860 128 64 8445 53693 821147 1406136 128 128 6069 77809 1487977 1827299 256 4 10118 9382 582983 483056 256 8 4881 5466 810490 682691 256 16 9488 18176 166994 963164 256 32 12560 27066 1306564 787312 256 64 19201 22263 1453348 393195 256 128 16021 110628 290608 1610276 256 256 15644 106008 958008 2081678 512 4 4691 6751 689001 457904 512 8 13899 19284 906185 454705 512 16 10520 21805 1086890 840895 512 32 7671 28968 480227 505908 512 64 27225 64056 1084694 1034032 512 128 26126 108569 1261144 677267 512 256 27815 27193 459668 1115688 512 512 26872 82526 461248 550523 1024 4 5951 5458 205660 198292 1024 8 10430 13920 464179 716567 1024 16 13952 29964 991495 240657 1024 32 14955 47601 1149061 372898 1024 64 28668 30187 832550 799985 1024 128 21405 90868 977060 249695 1024 256 30131 55166 969780 1343938 1024 512 32408 72051 508231 728725 2048 4 6622 6982 187251 201893 2048 8 10008 10571 404578 244040 2048 16 15110 19297 1122749 545537 2048 32 12857 27600 1358993 644222 2048 64 23187 26611 458476 393621 2048 128 29165 49078 643257 920500 2048 256 26515 39009 792005 1471180 2048 512 50440 53865 428622 526189 4096 4 6859 7145 278600 179647 4096 8 11304 15935 590357 378137 4096 16 13690 18327 258193 636013 4096 32 20436 27869 806611 616300 4096 64 36101 31446 1538201 537815 4096 128 31197 39551 385650 1329422 4096 256 39058 67984 739879 949698 4096 512 38449 49441 911843 553211 8192 4 7070 5582 209139 338373 8192 8 12038 11775 294814 395636 8192 16 14559 18068 593362 544676 8192 32 20409 17785 302367 241217 8192 64 19719 25498 898627 519690 8192 128 39517 41843 537283 837454 8192 256 43085 51844 546278 810298 8192 512 40951 62837 1173135 1016897 16384 4 7227 11797 313929 435941 16384 8 13488 11824 333889 188155 16384 16 17407 18299 361470 518298 16384 32 19284 15598 356747 455440 16384 64 18676 27907 378872 631730 16384 128 12583 29833 598086 306500 16384 256 23771 38639 692856 749772 16384 512 17967 44399 781126 457627 32768 4 5753 5500 288883 312773 32768 8 10319 11243 565276 362646 32768 16 16422 16583 340382 376357 32768 32