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: Wed Jan 21 23:15:58 2026 Auto Mode Machine = Linux oleg416-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-oleg416-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 1531 2638 186568 248136 64 8 1281 21100 424198 308970 64 16 2642 21608 571375 503814 64 32 2337 50640 901377 799377 64 64 2844 70793 1033216 1363961 128 4 2227 7818 232230 148643 128 8 3690 9549 209159 535368 128 16 7252 16270 529038 544601 128 32 5779 41238 1165070 985435 128 64 3804 72522 287126 1024942 128 128 3102 104149 1048974 2286447 256 4 2964 5826 31825 226107 256 8 7500 9665 176173 225159 256 16 10021 11267 36535 40609 256 32 16329 31821 753077 913973 256 64 8901 36729 897923 945356 256 128 9077 36708 1007446 1362952 256 256 15356 19006 952062 1911233 512 4 5598 5799 249887 167866 512 8 5417 5323 488641 585176 512 16 3904 13376 235940 248902 512 32 15562 26081 375643 540681 512 64 24565 95503 513530 1347393 512 128 31261 83605 1112797 603089 512 256 15507 61933 1017858 1426135 512 512 4428 57490 703445 1201856 1024 4 6342 5356 68670 76230 1024 8 7700 12353 205247 154546 1024 16 12905 34097 152337 335838 1024 32 23245 32144 425420 408429 1024 64 17125 24210 101719 86853 1024 128 18256 16748 1213334 285383 1024 256 25102 56775 644424 1220575 1024 512 17908 49040 310401 170612 2048 4 6059 5547 78242 73502 2048 8 6800 13382 124391 83099 2048 16 9018 10888 127935 87896 2048 32 14244 27887 471021 430146 2048 64 23016 42348 1180291 342408 2048 128 17262 23670 980272 294682 2048 256 12505 44157 252899 739058 2048 512 28518 62236 1483118 312522 4096 4 10627 5361 120282 66582 4096 8 11212 12347 313462 148567 4096 16 21257 14327 217098 232355 4096 32 14922 15550 496846 557357 4096 64 30605 39288 373761 491178 4096 128 24738 33108 795187 386413 4096 256 22907 53223 719852 414234 4096 512 26433 78734 1416335 479793 8192 4 2056 5050 165823 137807 8192 8 11940 12700 103888 82051 8192 16 9828 18713 344376 351920 8192 32 18742 17362 205864 359378 8192 64 18813 36477 575522 584520 8192 128 22184 32621 534267 744252 8192 256 39311 53246 650163 797731 8192 512 37730 53009 1002331 742434 16384 4 5723 5131 109721 132154 16384 8 8957 7274 158670 115239 16384 16 11014 14159 190127 213795 16384 32 13628 17759 212142 360857 16384 64 17915 28796 626557 323098 16384 128 21981 24748 336924 178786 16384 256 23071 24843 575603 670840 16384 512 22584 37950 852304 601821 32768 4 4335 4797 80589 84243 32768 8