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: Sat Aug 22 06:09:34 2026 Auto Mode Machine = Linux oleg438-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-oleg438-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 3002 4698 695778 428943 64 8 1765 27837 855419 538156 64 16 5268 22849 926260 280553 64 32 1841 10204 1163036 942521 64 64 4088 35049 155362 1210227 128 4 2798 11580 419494 496272 128 8 7080 17555 211216 182373 128 16 8578 17269 809997 699227 128 32 7635 23742 373136 794416 128 64 4504 24225 218791 1142750 128 128 8148 65842 1217930 1684006 256 4 4890 8448 550409 238778 256 8 12716 10735 822913 714967 256 16 14795 22356 1076103 170440 256 32 10587 35864 1306564 536654 256 64 13885 95623 1219045 1224606 256 128 9197 78262 556398 1552085 256 256 24873 54516 431601 2045979 512 4 4287 5088 454705 561462 512 8 15783 19870 849208 625941 512 16 13181 33828 973559 747261 512 32 18342 38723 1286067 446758 512 64 18164 52367 1394645 1336492 512 128 27074 46072 192412 1510391 512 256 20748 105804 1778004 876951 512 512 43536 79675 1747618 2124526 1024 4 4122 3599 200158 217358 1024 8 10630 10904 827099 653544 1024 16 17852 27400 503170 593571 1024 32 11933 52794 690530 575285 1024 64 20055 26048 913471 799390 1024 128 17855 37741 1747480 1404591 1024 256 21673 72256 578539 903099 1024 512 24090 77652 1003073 516917 2048 4 5814 5045 119897 230325 2048 8 11207 14066 888049 453898 2048 16 7362 11311 913841 211393 2048 32 37362 25027 1135362 885851 2048 64 26856 34472 371893 1223496 2048 128 12753 29031 929163 930975 2048 256 32229 66156 1113723 412149 2048 512 36061 93863 392023 936048 4096 4 4326 5187 137402 293302 4096 8 9114 9341 442189 345651 4096 16 16941 14824 565130 338034 4096 32 15844 26734 856902 622959 4096 64 24740 28336 727781 619567 4096 128 20310 27718 295502 370472 4096 256 22720 40848 835239 710387 4096 512 19383 48005 229209 279361 8192 4 4808 4954 161193 172575 8192 8 8301 10915 615701 292478 8192 16 19157 26915 199405 561178 8192 32 17187 30375 515418 513346 8192 64 26436 32979 505276 586055 8192 128 36375 32563 368825 390727 8192 256 30066 40363 1008361 310467 8192 512 39571 35583 331792 756209 16384 4 5380 6105 342252 321311 16384 8 7799 7545 330676 295766 16384 16 13256 18695 425602 464899 16384 32 20506 25058 459398 347693 16384 64 20068 22542 387869 390831 16384 128 36473 36213 610162 398917 16384 256 30484 55238 381821 379295 16384 512 28593 48944 1069733 611596 32768 4 5296 5853 347030 221023 32768 8