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 Feb 27 02:03:44 2026 Auto Mode Machine = Linux oleg229-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-oleg229-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 3880 9256 69187 20049 64 8 3429 20848 207798 243411 64 16 3214 40636 423529 355635 64 32 2114 33753 587635 228688 64 64 3150 22752 780776 998622 128 4 5164 6895 230633 57018 128 8 9231 16122 145619 233645 128 16 4520 16055 299124 215454 128 32 7786 52180 547377 486822 128 64 4703 60432 947186 699227 128 128 15884 106147 1319723 1196221 256 4 8688 7746 90528 72895 256 8 8955 21554 96674 182460 256 16 8466 38010 259370 639967 256 32 11360 43271 654798 828628 256 64 17716 71369 1052888 308475 256 128 10417 30231 882426 970126 256 256 15651 89227 1504249 1778290 512 4 5429 12888 142777 143579 512 8 13417 25241 277962 120497 512 16 16593 26121 257405 248787 512 32 11645 51190 612376 385835 512 64 12631 35484 910797 478089 512 128 26210 55117 402165 610287 512 256 26825 73059 1467055 899731 512 512 19723 126861 643189 1224470 1024 4 7081 11503 68058 67541 1024 8 19068 32027 163314 273150 1024 16 20095 28580 191758 365193 1024 32 38954 45938 519292 386557 1024 64 37985 85135 810095 964336 1024 128 39673 62840 557729 813316 1024 256 29286 64728 436311 876737 1024 512 30045 76202 1239598 1920993 2048 4 7898 7893 76955 95003 2048 8 14655 13796 85393 120731 2048 16 22133 21060 382151 173706 2048 32 12819 43773 479970 359053 2048 64 40127 43496 465256 219883 2048 128 27545 45821 1009890 322677 2048 256 58475 72008 660672 260097 2048 512 32688 72848 1459928 1391351 4096 4 8485 14767 143840 103956 4096 8 12382 25640 161113 169867 4096 16 19816 41582 238444 409192 4096 32 40121 63848 743626 211943 4096 64 21780 72269 584551 733906 4096 128 57322 68726 652437 652115 4096 256 65559 106727 868512 1026043 4096 512 67922 118408 1381928 714345 8192 4 11403 11136 151138 139564 8192 8 23011 25379 163916 202697 8192 16 36503 36684 246903 405200 8192 32 50862 52261 603906 519926 8192 64 47888 47258 622495 680514 8192 128 59668 81294 501405 681243 8192 256 57994 111432 888013 1219433 8192 512 58421 67733 289328 665411 16384 4 11290 11924 159635 99197 16384 8 20528 17489 142859 5291 16384 16 20117 31592 218960 232275 16384 32 30213 44380 439119 234660 16384 64 36806 39831 356888 334341 16384 128 29963 43741 750148 549651 16384 256 38764 82042 717555 1107846 16384 512 71739 92416 1261166 602993 32768 4 14217 15075 146607 119080 32768 8 20058 22735 199941 181394 32768 16 32032 36736 399449 381831 32768 32 36276 41357 350048 356444 32768 64 39829 36006 617587 625044 32768 128 47518 73571 1318677 882995 32768 256 51412 54947 797992 732949 32768 512 58172 79392 963167 1077962 65536 4 9284 11971 119686 132363 65536 8 18972 24095 232036 236897 65536 16 29839 34799 388660 341470 65536 32 46919 54024 615286 579533 65536 64 46082 60167 754388 612462 65536 128