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 12:10:51 2026 Auto Mode Machine = Linux oleg239-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-oleg239-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 1519 12723 615952 533875 64 8 5543 21185 633392 586352 64 16 2851 13629 987600 901377 64 32 7811 59747 1029254 866463 64 64 7926 21476 1392258 1638743 128 4 4645 7595 621518 576780 128 8 6189 16464 452366 643880 128 16 6521 38266 1007629 864797 128 32 7711 69195 1130717 1074159 128 64 8087 25827 1346196 1281909 128 128 6374 54444 1663139 1663139 256 4 3010 10531 666586 305839 256 8 11194 25569 933846 742146 256 16 8187 32173 1094754 883152 256 32 6554 59179 1003679 865358 256 64 9104 103634 62547 1286217 256 128 17931 64323 1572543 1471270 256 256 21563 54364 1117543 1839210 512 4 6511 11511 551654 338143 512 8 7404 13641 574684 213599 512 16 10548 18354 507462 670082 512 32 28653 10138 1233614 1053304 512 64 26250 29845 128033 1823291 512 128 10065 121561 1430887 1062686 512 256 51133 16043 1201856 1712772 512 512 17201 39847 2360376 2764505 1024 4 5555 6962 695675 165964 1024 8 17311 13188 484168 291405 1024 16 17208 58347 1286378 664978 1024 32 26527 32050 560129 957884 1024 64 12598 34371 735086 292476 1024 128 19028 17890 596042 1082454 1024 256 50836 92210 1259592 1577984 1024 512 22342 46802 1233545 737738 2048 4 5176 7299 187976 244047 2048 8 11331 11748 892757 769927 2048 16 29189 51798 1754908 1000015 2048 32 18408 31019 1005870 1040598 2048 64 38595 55206 1544450 677022 2048 128 32327 115394 893964 437774 2048 256 57609 62051 1056727 677450 2048 512 32077 50455 702377 841094 4096 4 4978 7821 195093 146683 4096 8 7714 8905 319573 198949 4096 16 9361 12044 583975 530164 4096 32 14735 28911 493620 1429177 4096 64 15272 17340 1495487 439385 4096 128 19583 37415 997043 222005 4096 256 14415 33220 404538 410541 4096 512 23964 27328 392227 630065 8192 4 4245 4647 188929 118444 8192 8 7146 8331 685073 381504 8192 16 15324 20956 546643 616873 8192 32 22323 40819 873076 601464 8192 64 37991 42458 1124196 385649 8192 128 33993 33221 1152825 405789 8192 256 31473 57260 567190 400978 8192 512 36824 66190 758379 741825 16384 4 6371 5955 278468 187524 16384 8 7708 12989 272802 290428 16384 16 19090 18834 313863 381385 16384 32 23584 30095 812942 630033 16384 64 23519 33738 1115615 555013 16384 128 31026 36076 723448 349332 16384 256 28454 47863 809246 715896 16384 512 43154 43736 430094 665694 32768 4 4904 6215 280176 292099 32768 8 10636 9627 277860 239928 32768 16