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: Mon Nov 17 12:59:15 2025 Auto Mode Machine = Linux oleg228-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-oleg228-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 4335 10811 231050 285628 64 8 4904 27504 402569 320021 64 16 4389 48710 610350 576282 64 32 4046 60257 842003 614542 64 64 3147 89127 546928 1226821 128 4 10191 15078 258135 33481 128 8 7130 30687 408949 426831 128 16 5736 12613 731625 442668 128 32 12073 80553 859260 934004 128 64 8389 108947 1057236 1065630 128 128 12810 43716 1266785 255433 256 4 11001 6216 230376 191609 256 8 15502 35486 439193 374804 256 16 14256 19075 797250 535583 256 32 9735 67438 221444 62962 256 64 18608 132156 1168627 1230218 256 128 24532 89108 1415041 684432 256 256 18868 67332 169311 1707589 512 4 8329 4618 152197 234959 512 8 13138 29264 411568 178647 512 16 22414 29774 646480 573303 512 32 24629 40622 747521 602412 512 64 23463 108126 1264113 1028091 512 128 14928 130547 1305615 1187895 512 256 34037 164623 1455126 754083 512 512 17855 145870 1524329 1867692 1024 4 11034 11498 53553 123476 1024 8 18953 27735 547003 396112 1024 16 18799 55276 491144 615694 1024 32 19559 21128 661496 774034 1024 64 31272 80169 1032244 899694 1024 128 26334 90283 1186518 1145383 1024 256 17419 86406 1481633 1183575 1024 512 46494 125335 1430318 707712 2048 4 7354 5838 125130 187100 2048 8 11023 23182 347407 404026 2048 16 13646 19799 548779 719075 2048 32 15666 23992 126693 143902 2048 64 22683 31848 1046939 203096 2048 128 42970 58752 1038459 1094565 2048 256 32840 51965 1075650 1237420 2048 512 33696 35527 1413328 1321161 4096 4 9886 5551 144296 88871 4096 8 10397 10806 326763 195095 4096 16 13718 18960 400231 187357 4096 32 34011 30389 680854 677926 4096 64 27061 33097 633177 261422 4096 128 37880 1315 713692 581072 4096 256 26525 55521 1442740 983178 4096 512 35565 82796 1531209 1047884 8192 4 8058 7448 88337 227656 8192 8 14313 20588 172481 291167 8192 16 18580 20189 492367 505180 8192 32 24278 40353 749970 683751 8192 64 31696 68268 920757 739478 8192 128 58561 33535 772028 999270 8192 256 41426 97142 461211 990913 8192 512 30938 45134 407319 1151241 16384 4 5167 6465 118708 91477 16384 8 15473 12219 222705 132750 16384 16 17601 14003 249235 143296 16384 32 15932 28477 240682 647229 16384 64 25135 32460 423786 495658 16384 128 43624 47778 1085379 357339 16384 256 40036 64560 693647 640199 16384 512 29205 45123 990268 784488 32768 4 7359 7680 160197 139917 32768 8 11511 11353 187257 222691 32768 16 17476 29618 285913 275470 32768 32 27967 40219 801389 461632 32768 64 32177 43097 962378 798168 32768 128