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 Aug 27 07:13:47 2026 Auto Mode Machine = Linux oleg157-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-oleg157-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 2510 8313 673098 560635 64 8 4751 13471 792299 546928 64 16 4423 30175 866463 866463 64 32 3826 29963 388021 1066042 64 64 3685 17982 1452528 1484662 128 4 3963 5293 280086 458548 128 8 9139 28255 847059 1266785 128 16 9779 47127 1939522 780556 128 32 8947 56041 1294270 1409828 128 64 14590 126477 1424795 1175271 128 128 13156 78768 761728 1406136 256 4 1693 8634 231469 295975 256 8 2949 4367 57890 12623 256 16 7248 35368 1066483 365118 256 32 16508 44152 1391207 295975 256 64 3799 53298 1479379 1213534 256 128 9935 25349 1543163 1175022 256 256 9146 63396 1447470 1619994 512 4 3682 11360 424168 295641 512 8 8545 23891 973559 867738 512 16 5164 13934 1098566 427036 512 32 11161 15634 1372364 939486 512 64 31888 49136 1309596 373748 512 128 30845 26383 2152206 1358474 512 256 7997 25047 1365383 693003 512 512 14648 85062 1523247 1084694 1024 4 7801 9470 292656 72924 1024 8 6493 6273 212046 129064 1024 16 4438 6555 1061060 145519 1024 32 16900 10671 738880 124032 1024 64 32201 50097 1503942 923290 1024 128 41093 89731 353094 487853 1024 256 40856 160903 1163693 1102176 1024 512 61083 157003 1706515 1194770 2048 4 9858 6292 363382 212360 2048 8 8486 17229 152155 250546 2048 16 13186 11565 826845 345132 2048 32 25949 24748 528812 1145965 2048 64 29327 33869 181272 434915 2048 128 18863 32973 1692662 225826 2048 256 31991 49535 1398828 869707 2048 512 31242 52064 1550304 1504681 4096 4 5563 7157 241752 247659 4096 8 9522 16366 577303 327367 4096 16 12424 17232 662782 280278 4096 32 19078 19350 1097838 586307 4096 64 19462 31492 533821 850160 4096 128 19349 23728 712715 394950 4096 256 45313 41910 907988 1389416 4096 512 35928 48316 933647 805968 8192 4 6413 7457 242624 203562 8192 8 12846 13942 548178 405487 8192 16 21772 16478 510888 479510 8192 32 20573 25195 887142 593106 8192 64 30494 35063 1040264 556560 8192 128 30224 40709 510592 825066 8192 256 29656 48452 677468 978748 8192 512 28098 48583 988177 610158 16384 4 6798 7502 319582 301887 16384 8 11666 14937 410194 483246 16384 16 16369 23071 1183210 830739 16384 32 22569 30104 852622 593730 16384 64 31948 33636 664471 844709 16384 128 31694 50452 476583 385369 16384 256 37418 51939 1282108 863909 16384 512 45582 43861 520208 372736 32768 4 5642 6527 313572 284602 32768 8 10017 10987 228442 214766 32768 16