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 Jun 26 09:40:39 2026 Auto Mode Machine = Linux oleg232-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-oleg232-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 2988 3974 533875 315507 64 8 5530 3912 831569 592827 64 16 4163 27128 1599680 151675 64 32 8796 45747 1143223 942521 64 64 4203 51249 1226821 1780008 128 4 3011 2442 615109 505620 128 8 9937 14683 853794 338761 128 16 11357 26880 1030846 895074 128 32 7613 23668 1294270 526961 128 64 11201 87798 800337 1306873 128 128 15645 47373 538051 1885042 256 4 8598 11865 380381 569985 256 8 9740 15330 433169 294918 256 16 17656 33135 1102624 1007446 256 32 10255 56179 1243036 1040643 256 64 23025 60749 1327564 822913 256 128 12023 58144 1532153 1495866 256 256 24443 69887 1549845 1632308 512 4 12289 9302 558396 364672 512 8 13869 19056 867738 755144 512 16 21354 20531 385558 797489 512 32 17158 13971 108219 1081961 512 64 17713 34320 1300082 365168 512 128 20563 26137 1518938 649020 512 256 11970 41463 382059 1647088 512 512 16001 47637 1778004 433939 1024 4 9558 6101 633213 543542 1024 8 12603 13086 251848 570471 1024 16 15367 13886 1000969 946276 1024 32 14775 34019 755118 570092 1024 64 32586 49049 962391 1229309 1024 128 29656 42475 1056883 569790 1024 256 29357 60174 1144163 1028043 1024 512 27054 99929 354697 235240 2048 4 5145 4597 647719 244826 2048 8 13909 10402 465155 373722 2048 16 17132 23107 208702 530281 2048 32 18343 28032 514311 1037957 2048 64 30895 22129 958718 627836 2048 128 19292 30284 1128946 797150 2048 256 35933 42658 1601164 326951 2048 512 38944 59625 791348 967901 4096 4 4800 4912 191402 241294 4096 8 12349 8834 322591 244390 4096 16 9913 14687 719611 419289 4096 32 23847 22288 506111 292508 4096 64 22996 29418 533755 178466 4096 128 23909 28672 1389978 543532 4096 256 28421 61286 1806732 429391 4096 512 28506 35537 962144 685746 8192 4 4512 4960 426909 311885 8192 8 7086 12960 324614 354568 8192 16 18769 21351 351302 451301 8192 32 17175 27689 692013 736956 8192 64 17274 27257 910727 823721 8192 128 28604 41468 935906 784759 8192 256 34701 46376 1042758 592809 8192 512 36589 46822 746288 609703 16384 4 5700 8171 473705 296248 16384 8 9568 13679 673596 455036 16384 16 16685 18575 607557 445435 16384 32 21758 24623 663880 585056 16384 64 22030 31532 580147 693794 16384 128 27649 44908 847031 895346 16384 256 28424 56974 657151 714549 16384 512 37109 50939 1234123 916066 32768 4 5781 6154 306203 350868 32768 8 9848 12020 411947 474191 32768 16 17882 21927 447216 387626 32768 32