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: Mon Dec 22 09:32:09 2025 Auto Mode Machine = Linux oleg407-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-oleg407-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 1614 2040 186568 96810 64 8 4162 8453 402569 324665 64 16 4687 32420 615952 703068 64 32 3660 50592 842003 752329 64 64 2811 54930 831569 752329 128 4 6258 7352 170445 184187 128 8 2882 22163 430942 381895 128 16 5175 20638 554157 566435 128 32 3099 58230 597981 691126 128 64 6949 70217 1007629 1114289 128 128 10630 83562 1391557 1185654 256 4 8864 14290 235067 238143 256 8 9793 30353 378103 308386 256 16 8027 16688 727070 547044 256 32 10231 69602 797250 927393 256 64 14662 76125 820398 941213 256 128 19583 101422 1325925 1243036 256 256 8789 85334 1686137 1610276 512 4 8191 4988 98256 140461 512 8 5226 23367 437564 100547 512 16 12380 12918 114870 526240 512 32 9936 32094 112505 170899 512 64 7852 53950 725058 847532 512 128 16332 91363 977103 939075 512 256 25286 59472 1185272 1426135 512 512 28627 91492 1712772 1098566 1024 4 9237 3494 106025 104138 1024 8 8303 11983 308152 376724 1024 16 24538 35971 584126 591935 1024 32 13922 18789 778242 757515 1024 64 28684 73027 978172 883591 1024 128 38580 43423 530845 433712 1024 256 15686 41435 87950 1004951 1024 512 14393 93065 1492445 908640 2048 4 5067 6095 207477 194418 2048 8 14201 16022 137412 207517 2048 16 14720 16742 716556 675213 2048 32 29126 23576 832535 741482 2048 64 24368 44464 1108120 441759 2048 128 29523 60307 377300 1206145 2048 256 31898 42056 1532875 1297807 2048 512 51661 70533 1637174 1430271 4096 4 8139 6645 83002 98452 4096 8 9229 9106 119190 192319 4096 16 31304 31471 404586 395404 4096 32 17994 15941 333409 692574 4096 64 46675 67214 1099032 917541 4096 128 53926 77531 1274773 1121928 4096 256 57094 92865 803931 978251 4096 512 51014 99851 1471911 888684 8192 4 4945 12166 234472 141916 8192 8 16917 1779 114012 90203 8192 16 15500 14135 359690 408534 8192 32 23972 45613 378612 378366 8192 64 15678 20374 663702 751216 8192 128 31650 23660 724112 333321 8192 256 16801 31250 325069 375915 8192 512 44805 50785 506774 454681 16384 4 4721 6425 196427 212820 16384 8 11208 12582 387337 230747 16384 16 23328 29412 619832 312916 16384 32 31675 34073 242496 227704 16384 64 29887 56713 332555 398977 16384 128 25376 28868 371941 417066 16384 256 28638 44420 855786 586254 16384 512 38134 45031 824559 488491 32768 4 7329 6570 140269 71034 32768 8 9862 13901 223592 229820 32768 16 18902 21081 551556 204058 32768 32 18218 30868 614552 448531 32768 64 30343 44385 745541 553364 32768 128 27133 49770 582956 585402 32768 256