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 Sep 4 11:15:49 2026 Auto Mode Machine = Linux oleg440-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-oleg440-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 1018 10197 598110 515423 64 8 1241 17265 811459 470274 64 16 1718 7627 653436 413101 64 32 3381 44166 1204796 338589 64 64 5020 58548 124286 801764 128 4 5300 5233 571257 546819 128 8 4011 3814 809997 727658 128 16 6650 21955 805138 819893 128 32 7114 64974 443033 992724 128 64 6724 37241 1363288 1243315 128 128 9360 63589 1359835 2211113 256 4 3981 2817 36644 502028 256 8 4649 19922 386682 711178 256 16 7343 15297 914752 853662 256 32 5340 24175 973645 1062263 256 64 5480 28365 372076 898674 256 128 5987 61026 352068 778183 256 256 14850 40213 1829808 1938842 512 4 4121 10887 589837 398138 512 8 7963 15750 895230 759685 512 16 4117 11396 860437 873740 512 32 16913 32945 582478 265981 512 64 9928 22910 1184618 1213400 512 128 18843 54185 1394645 873740 512 256 9526 21862 117298 1339827 512 512 9782 62645 697505 797489 1024 4 4018 8664 123461 138490 1024 8 12146 13499 381103 382087 1024 16 20488 18553 679496 573288 1024 32 19329 36394 837257 1045817 1024 64 21829 24308 526485 446982 1024 128 27250 43172 780504 650180 1024 256 35726 51207 406035 169991 1024 512 23581 33516 225649 1343938 2048 4 8217 3845 126363 122444 2048 8 15651 11387 281749 262530 2048 16 7567 12788 1048089 982289 2048 32 22857 17599 552912 1102856 2048 64 15364 22881 609353 529334 2048 128 14473 43154 291739 808859 2048 256 18807 26928 1558743 141837 2048 512 19963 44049 1584038 631111 4096 4 5212 4644 297071 129944 4096 8 4916 7060 294484 113667 4096 16 6156 11364 626961 353010 4096 32 11144 14833 449560 385797 4096 64 16202 24145 245785 332146 4096 128 14298 27025 569363 795187 4096 256 32506 34098 445596 299986 4096 512 34192 51257 1740120 300448 8192 4 4553 5344 174520 176806 8192 8 8397 7807 488697 229937 8192 16 18145 12504 196506 189595 8192 32 10815 22578 594491 389350 8192 64 14853 20506 327548 321606 8192 128 22331 31068 342232 306493 8192 256 22546 34419 398906 531844 8192 512 21341 39849 644892 441047 16384 4 4582 5070 162341 127236 16384 8 5124 7915 205666 224256 16384 16 10198 10966 538736 538558 16384 32 12945 15134 459721 392535 16384 64 13369 26728 1022401 683036 16384 128 34225 21486 339290 426633 16384 256 26334 38336 759047 690143 16384 512 36638 41369 920706 549282 32768 4