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: Tue Sep 15 10:02:58 2026 Auto Mode Machine = Linux oleg452-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-oleg452-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 1886 6918 467815 444572 64 8 3398 23914 438759 743988 64 16 4242 29235 586352 174444 64 32 4523 58934 983980 969761 64 64 2174 23547 359926 1492919 128 4 2245 6958 595328 506097 128 8 8059 21028 913347 223063 128 16 7152 31312 811221 789741 128 32 6459 26974 857887 976473 128 64 6999 33073 819893 1196221 128 128 6390 43880 516318 1579934 256 4 5567 8507 326483 430218 256 8 7345 9863 502969 483927 256 16 10788 12328 407676 855703 256 32 9973 23842 361552 1048775 256 64 8492 56188 1231629 733527 256 128 9912 30001 1422540 1354356 256 256 9578 72316 669913 1924938 512 4 5757 7813 465447 348515 512 8 8291 15924 497125 655558 512 16 9505 17979 539595 300145 512 32 13395 46843 1030064 342894 512 64 12361 42265 982467 1047141 512 128 15513 28005 1406520 1038532 512 256 23808 63752 855978 1624659 512 512 21136 90926 1635797 1533034 1024 4 7613 10863 304936 367160 1024 8 11844 9912 527585 279478 1024 16 9356 18950 966071 949834 1024 32 14542 38832 899694 963471 1024 64 25003 61086 1454537 658858 1024 128 35956 64650 334843 553203 1024 256 34251 37983 1412443 507151 1024 512 36156 44217 857654 1013010 2048 4 7011 8966 202852 210095 2048 8 10799 10392 735640 414916 2048 16 19256 20180 706652 584834 2048 32 21686 30341 337405 247942 2048 64 27969 21800 781698 708634 2048 128 32665 33622 1458688 515732 2048 256 27421 89233 464627 304490 2048 512 43679 101606 853971 470480 4096 4 6241 12585 217582 359548 4096 8 13575 12282 378279 364863 4096 16 20084 19750 684380 594236 4096 32 24425 42159 501048 223225 4096 64 36471 47687 359804 665375 4096 128 49067 60813 1010592 653157 4096 256 45377 44368 993928 642122 4096 512 28323 58562 1435147 646253 8192 4 8854 10827 324421 273650 8192 8 13965 16355 609336 461205 8192 16 17222 23546 679438 593495 8192 32 27784 37933 619621 572111 8192 64 36702 51077 584430 625065 8192 128 28270 73120 1561323 1360576 8192 256 40733 46580 836516 1037093 8192 512 37813 78748 964895 661504 16384 4 8708 9375 543323 298254 16384 8 17802 13234 409950 349301 16384 16 17722 22617 602507 483630 16384 32 24982 39173 789590 440939 16384 64 34349 46467 628707 686468 16384 128 32760 50027 697604 701070 16384 256 43020 54741 1044165 693150 16384 512 33969 57008 785089 560440 32768 4 8748 9507 405855 293380 32768 8 12356 14569 564139 340545 32768 16 21389 25610 788014 641013 32768 32 28167 37157 900490 797914 32768 64 33840 40343 558207 580879 32768 128 36487 49485 949545 895672 32768 256 38254 63376 1164048 733720 32768 512 45420 53121 765592 526749 65536 4 9745 8751 385446 346705 65536 8