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 25 23:17:02 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 3548 8973 673098 639427 64 8 2917 7875 831569 633392 64 16 3316 32752 818885 877797 64 32 5430 40896 955947 1049372 64 64 3399 24557 1357066 1879725 128 4 3921 8611 670413 165608 128 8 7162 9570 866192 589446 128 16 8386 13455 1102844 579270 128 32 5081 50316 1217930 1185654 128 64 7618 50449 677178 1102844 128 128 4748 18929 630273 2066432 256 4 3947 5755 292588 463058 256 8 6849 13517 708831 548161 256 16 11872 42119 1007446 118022 256 32 10396 55123 1306564 947860 256 64 7929 59425 1137672 1266495 256 128 13463 99486 1361224 1405778 256 256 13208 73434 1552085 805021 512 4 7045 8861 221075 159299 512 8 11978 9599 896725 369376 512 16 16492 24649 768934 716112 512 32 20480 24330 1299295 480227 512 64 18288 45337 996139 1174254 512 128 12633 63961 1454140 649806 512 256 18337 86314 643381 1451192 512 512 19398 54225 1096322 1778004 1024 4 9132 9754 619067 469970 1024 8 12029 15405 506912 477812 1024 16 26053 22604 948995 522133 1024 32 16932 24718 848337 669226 1024 64 17254 28876 1273788 1239598 1024 128 31103 36931 1446211 1187831 1024 256 24579 87059 1151834 561447 1024 512 32253 72213 896689 1084914 2048 4 7333 8380 312045 424638 2048 8 15801 21496 224410 479970 2048 16 17575 28816 885851 267434 2048 32 21940 30937 1324624 1151187 2048 64 39528 58407 659353 877885 2048 128 37688 78512 1538641 1386635 2048 256 45419 72005 1518244 874488 2048 512 30114 38691 1742802 916376 4096 4 8084 13632 554944 597004 4096 8 19067 20213 625636 414824 4096 16 28120 30876 523380 638424 4096 32 38973 34072 1215086 400932 4096 64 26197 65171 1263801 823824 4096 128 53878 63057 888868 1171263 4096 256 43867 97045 1737129 883519 4096 512 44565 79450 668846 1210036 8192 4 10116 10388 209776 304897 8192 8 15807 19508 406427 446550 8192 16 24285 31910 933236 540368 8192 32 23313 41433 512061 972212 8192 64 42929 58681 800705 996980 8192 128 54637 57786 942917 784741 8192 256 60295 57211 1389181 1169621 8192 512 41855 82070 1045169 1011717 16384 4 11265 13669 347966 432707 16384 8 6561 21212 566194 313564 16384 16 31371 33907 599051 570708 16384 32 34782 44627 850943 671752 16384 64 32788 45427 868802 1090736 16384 128 49011 55629 1098425 652905 16384 256 46644 64347 1020109 687244 16384 512 50016 72882 1118357 722618 32768 4 10402 11696 561991 406647 32768 8 16054 17942 533698 390830 32768 16 23210 35029 839517 659673 32768 32 27952 42133 1062824 572095 32768 64 34409 49484 790161 821252 32768 128 38387 54382 722701 718925 32768 256 51897 67741 1313875 879464 32768 512 50001 69209 1416943 1251347 65536 4 12192 10305 615371 421604 65536 8 16447 20114 577654 633222 65536 16 26797 35881 696138 676501 65536 32 42684 48584 816364 855257 65536 64