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 Oct 23 14:53:31 2025 Auto Mode Machine = Linux oleg142-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-oleg142-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 6889 16431 270108 178266 64 8 10849 31323 429630 309326 64 16 13385 49841 647135 418250 64 32 16714 71586 955947 470274 64 64 5912 65635 886494 1279447 128 4 10784 15007 243389 241528 128 8 8021 32694 266727 302666 128 16 16359 47905 540217 362798 128 32 19271 69230 895074 628061 128 64 17701 85682 346859 621518 128 128 10321 110996 695603 1346196 256 4 7902 13485 230228 176057 256 8 9626 29136 231220 356510 256 16 21994 36999 437582 327779 256 32 27883 55007 669913 713067 256 64 25592 99810 999940 941213 256 128 16826 34408 1132871 1293967 256 256 21349 37101 992545 1740810 512 4 14442 9448 164737 128902 512 8 7045 20680 413549 107719 512 16 11129 27537 551088 543006 512 32 42212 81267 1045103 335292 512 64 39436 62554 1015932 955368 512 128 55184 38346 1276891 38435 512 256 21315 129688 1501940 1343179 512 512 55225 132915 1267097 1862832 1024 4 12228 11996 68407 70194 1024 8 7586 19318 402987 362205 1024 16 32380 47760 582778 588528 1024 32 20124 66814 230011 772781 1024 64 43841 45618 967813 349133 1024 128 64527 68020 1127641 1052480 1024 256 28238 40594 1151834 883591 1024 512 49797 113907 1501838 1432225 2048 4 12427 5812 218363 155957 2048 8 14456 18334 278750 155671 2048 16 28883 28754 253556 541070 2048 32 29415 68692 989417 809851 2048 64 34202 97808 1183707 689079 2048 128 79278 88750 1333466 1213129 2048 256 31944 111479 488319 1381950 2048 512 30210 54268 1473451 1516101 4096 4 10783 8484 134710 177910 4096 8 16648 19508 202851 315054 4096 16 18984 28160 686788 274768 4096 32 29801 41651 712331 584810 4096 64 60311 37150 1012140 657054 4096 128 23715 33521 1401316 866671 4096 256 49761 100550 1544979 567314 4096 512 30152 78250 1006388 1467010 8192 4 6887 2141 182093 168379 8192 8 10800 17162 146411 111604 8192 16 23823 27283 295527 324872 8192 32 24850 25858 668089 454657 8192 64 39112 45573 634835 776705 8192 128 26164 44945 547262 957234 8192 256 37674 77481 1365768 650471 8192 512 42832 106748 669339 489484 16384 4 7828 12164 121512 129772 16384 8 13970 12007 314376 226198 16384 16 10576 23226 503318 425890 16384 32 21143 28991 679302 577961 16384 64 22733 61531 698533 821248 16384 128 30094 36023 251512 357666 16384 256 29231 61140 907094 850722 16384 512 32187 32819 454771 234026 32768 4 6154 7043 179245 149074 32768 8 14944 17667 240324 296398 32768 16 25300 30619 314239 378112 32768 32 40667 35984 756385 536334 32768 64 31651 39033 922496 415479 32768 128 45773 62750 1016787 1009083 32768 256 63067 68251 871859 941093 32768 512 60354 81165 1337360 852045 65536 4