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: Sun Nov 16 22:03:08 2025 Auto Mode Machine = Linux oleg448-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-oleg448-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 3407 16207 246994 220064 64 8 7766 32175 481234 351905 64 16 3969 52895 653436 681644 64 32 4030 66185 666414 789967 64 64 7705 75301 1183548 1255511 128 4 9540 16935 205791 253983 128 8 11444 19297 438331 390222 128 16 9442 58637 766076 408949 128 32 6984 85668 757430 809997 128 64 20990 107014 1206978 1076312 128 128 18831 124281 1346196 1802755 256 4 7339 15935 269797 72767 256 8 15524 29418 385018 372593 256 16 12269 38606 562815 173665 256 32 18856 43664 988889 530031 256 64 20597 94571 1012194 831194 256 128 28393 123307 1190657 1019886 256 256 22582 149176 1570244 1471270 512 4 12570 19999 183910 223584 512 8 17601 21557 479905 370204 512 16 25864 55500 129227 601737 512 32 30507 71248 1147892 831132 512 64 38935 113950 1248678 1010197 512 128 41387 124935 652174 1354190 512 256 35629 148668 1707325 1645826 512 512 37152 182395 1547395 1701913 1024 4 16292 15729 256710 184675 1024 8 19791 17840 456969 330336 1024 16 28254 35595 580808 614285 1024 32 44603 76738 965854 833843 1024 64 35566 60142 786507 721624 1024 128 44735 133455 1442326 1297649 1024 256 34279 92786 1551758 202929 1024 512 64871 175377 1659694 1681132 2048 4 13509 14582 158723 148761 2048 8 16373 31623 447070 218635 2048 16 23264 36433 510187 539101 2048 32 34929 57063 496849 378848 2048 64 54569 88488 1069489 965616 2048 128 41608 79908 1295458 799673 2048 256 58339 91038 1514764 1171598 2048 512 69745 132634 1767183 1528239 4096 4 16663 15281 255714 233590 4096 8 14780 24083 335624 233791 4096 16 32395 31979 251521 467787 4096 32 39350 44228 426576 708512 4096 64 32440 51368 957906 941372 4096 128 53343 63473 1182388 1088173 4096 256 49661 75549 1291641 1198723 4096 512 52591 101715 1490039 1419260 8192 4 13711 12275 170581 246642 8192 8 19421 26561 327679 410237 8192 16 31172 49392 576701 475535 8192 32 43964 62744 721436 764674 8192 64 55381 72903 1147665 835661 8192 128 72757 102087 1256995 1185194 8192 256 71302 109775 1579336 1034096 8192 512 54701 120300 1847118 1465996 16384 4 13805 15022 213358 254331 16384 8 4774 20835 421096 329884 16384 16 26426 29017 629162 412705 16384 32 33942 38547 491380 372829 16384 64 33389 46323 692096 308642 16384 128 46257 78019 419630 752803 16384 256 51003 62824 752563 435813 16384 512 58944 73717 691747 1086460 32768 4 9750 9181 111105 123655 32768 8 13881 14378 334486 259706 32768 16 23618 27582 302949 427836 32768 32 31971 48535 712145 638031 32768 64 45361 73901 1027982 791020 32768 128 59056 88416 857804 1143620 32768 256 55449 89337 1475509 1074045 32768 512 69397 95191 1163713 569185 65536 4 11619 12366 245648 194345 65536 8 21032 21683 259175 285014 65536 16 25981 32581