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 03:21:49 2026 Auto Mode Machine = Linux oleg330-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-oleg330-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 2612 8103 542506 546928 64 8 2264 13547 863676 275939 64 16 3144 13783 889431 842003 64 32 3325 36677 1119387 681644 64 64 3124 54056 1279447 1484662 128 4 4819 7862 656477 198194 128 8 2957 16058 298459 702889 128 16 6093 20873 1030846 962469 128 32 10887 25952 1281909 962469 128 64 11243 32896 703810 1229084 128 128 7570 25518 1209698 612303 256 4 7127 9865 619655 543445 256 8 4242 17680 775933 873809 256 16 14195 19734 809878 894929 256 32 8570 35848 1230218 1080434 256 64 15515 32879 1048775 1300235 256 128 18480 97049 1561112 1763685 256 256 9697 36602 1673001 2266207 512 4 6890 6246 394120 405429 512 8 6268 9954 1459080 501888 512 16 11497 27417 355260 930933 512 32 14661 33398 1484293 1150351 512 64 11593 45438 1103647 1237168 512 128 26567 67340 1556366 1575781 512 256 16227 76111 1520013 911184 512 512 23008 38958 1882427 2047551 1024 4 5163 6013 536146 188303 1024 8 12334 8990 574977 243993 1024 16 11111 19113 906148 551782 1024 32 16399 42927 1416636 1132697 1024 64 16113 37275 544714 584842 1024 128 25739 44951 307776 567006 1024 256 15193 49983 1609925 1452570 1024 512 33191 55760 928479 1747480 2048 4 5220 7127 191368 293785 2048 8 9616 11106 204124 470789 2048 16 14245 12939 434453 1032840 2048 32 19405 33429 310871 1074439 2048 64 14638 29266 782268 833261 2048 128 37575 70484 740907 402833 2048 256 29668 56610 395379 332417 2048 512 36486 29361 1213300 818805 4096 4 9563 4262 418044 373753 4096 8 17237 10231 459394 234176 4096 16 18839 27046 722152 232107 4096 32 18752 22271 904593 1359833 4096 64 30296 37724 339410 510154 4096 128 27337 42772 1049164 337642 4096 256 26593 23502 443628 195653 4096 512 34418 100200 1646400 256945 8192 4 6660 5786 257966 172043 8192 8 19029 13321 458393 428186 8192 16 14574 2850 220060 440267 8192 32 21528 27218 400114 342860 8192 64 13715 23029 706020 206518 8192 128 19113 33039 420555 584938 8192 256 24782 20905 316062 307494 8192 512 20859 32029 839951 742707 16384 4 3963 3944 157276 159998 16384 8 8421 13644 343761 247327 16384 16 10917 17107 463848 410842 16384 32 24564 29769 1288841 1102637 16384 64 36480 36035 491700 415721 16384 128 21769 32860 956112 775284 16384 256 20900 43098 900308 561329 16384 512 37716 39627 1123899 845582 32768 4 8536 8016 213884 161928 32768 8 9806 9708 312084 343224 32768 16 12415 13076 438086 622798 32768 32 19357 21479 543327 613047 32768 64 24484 32900 676283 736559 32768 128