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 Jan 1 20:03:10 2026 Auto Mode Machine = Linux oleg250-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-oleg250-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 1232 5734 271200 8594 64 8 3995 26090 320021 14739 64 16 4187 23332 429630 447537 64 32 4368 34464 771797 688639 64 64 4558 53326 735831 1304314 128 4 1992 11116 184187 139744 128 8 3546 20816 247086 362553 128 16 6550 53067 283188 496272 128 32 6472 43286 739689 666253 128 64 7421 50058 1102844 914904 128 128 8609 59343 1217930 1561553 256 4 6326 8241 160001 168408 256 8 7037 21242 375459 244265 256 16 5859 16090 787312 691930 256 32 11076 36940 853662 616807 256 64 16893 61788 1274008 697776 256 128 15760 65673 1158540 153747 256 256 15006 102243 695516 1924938 512 4 8854 7330 254477 94412 512 8 6509 12193 180221 108202 512 16 10849 12149 572691 206116 512 32 15788 42254 820337 309756 512 64 20853 50904 899731 859060 512 128 12614 41300 478942 504008 512 256 23365 67814 1120344 1267097 512 512 19066 83880 297361 1854787 1024 4 4363 5358 33047 63535 1024 8 9732 8947 252395 394293 1024 16 9420 9163 544990 230110 1024 32 20384 34539 636781 291979 1024 64 19316 40189 863343 541213 1024 128 25918 65749 590551 1041758 1024 256 18023 56790 1345623 444668 1024 512 28685 63334 720534 1406431 2048 4 7577 5287 75571 67727 2048 8 7227 9636 221146 215985 2048 16 13396 10506 104484 163341 2048 32 14536 22035 350612 159786 2048 64 17474 24773 591072 821861 2048 128 17263 24516 312238 257609 2048 256 21308 40872 306818 387216 2048 512 10734 49467 306500 668435 4096 4 4533 6254 50229 156862 4096 8 9517 10729 208904 164689 4096 16 10832 10377 281998 295020 4096 32 12081 14183 139097 140664 4096 64 18547 22453 464926 449266 4096 128 20321 29719 418512 429756 4096 256 30994 44240 703176 583222 4096 512 15628 36146 1420786 330002 8192 4 1573 4995 103760 98486 8192 8 7262 10179 99985 113678 8192 16 12492 10246 179166 208267 8192 32 14385 16755 220767 223251 8192 64 20758 43885 566881 409659 8192 128 26041 24896 814620 552960 8192 256 18777 32068 961385 741361 8192 512 27167 24744 537115 373740 16384 4 4824 5423 95489 65167 16384 8 9135 8887 156246 180783 16384 16 14037 13502 370276 272558 16384 32 26291 20461 462070 298548 16384 64 19333 20656 387842 304088 16384 128 17272 35465 724859 612829 16384 256 23819 46193 943186 478168 16384 512 25294 40617 581526 483188 32768 4 5195 4361 72531 48809 32768 8