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: Sun Aug 9 16:07:42 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 2327 5513 537079 454354 64 8 5920 3326 695778 620221 64 16 2006 39846 886494 548044 64 32 2334 25764 1143223 1210227 64 64 2768 50957 1101022 1518251 128 4 4764 9048 37546 139599 128 8 7734 13640 526444 248458 128 16 5581 15080 253983 819893 128 32 3888 41734 1105114 955616 128 64 9233 42327 1254941 1217930 128 128 7003 81892 42441 1833539 256 4 6044 7867 610842 71445 256 8 11722 18836 468104 641497 256 16 5403 11920 161396 67527 256 32 11959 28796 1153561 802614 256 64 20790 32955 1254656 1099237 256 128 13301 45853 1089202 1099237 256 256 15633 45102 203830 1897721 512 4 9953 8901 618371 344766 512 8 6838 15752 820337 226532 512 16 16099 28395 238032 430201 512 32 16531 58268 1343179 389403 512 64 21330 80199 434290 200235 512 128 35734 94724 1282994 261098 512 256 20987 56965 885631 1700565 512 512 27254 56550 636139 1193838 1024 4 8924 5929 204963 184969 1024 8 9884 8044 465235 454310 1024 16 19160 16307 499716 165453 1024 32 18057 44736 555349 251038 1024 64 25520 21555 748538 782210 1024 128 24138 43775 278174 358307 1024 256 28397 76106 546725 148667 1024 512 37313 95089 880331 347354 2048 4 6287 6093 270320 274563 2048 8 13241 15856 364091 232595 2048 16 14633 8539 472654 454210 2048 32 12522 26833 394308 447746 2048 64 29601 39768 1162246 386050 2048 128 22671 27080 990330 717633 2048 256 37569 83835 530970 435290 2048 512 56192 96937 714351 1072829 4096 4 5656 5595 239404 349519 4096 8 9348 14934 332763 503014 4096 16 15213 26247 701253 377266 4096 32 16583 25361 487319 452187 4096 64 33716 1453 522584 981773 4096 128 17521 46386 495943 356208 4096 256 37689 56572 486408 486106 4096 512 23685 54620 581741 252001 8192 4 6808 7148 139676 150494 8192 8 9708 11820 358744 313198 8192 16 22172 17379 450136 350535 8192 32 19295 21004 581158 642708 8192 64 22138 28630 548590 830651 8192 128 27099 41064 1403423 797824 8192 256 40216 39172 925644 693942 8192 512 37792 37428 1304677 705353 16384 4 9011 9701 363088 307658 16384 8 9500 13750 394851 412051 16384 16 12586 16834 412789 412269 16384 32 31978 34390 1324487 781082 16384 64 19186 29532 585959 555143 16384 128 28447 31060 959302 792376 16384 256 32586 33041 586249 279465 16384 512 24463 33365 1165867 692912 32768 4 7523 8437 274262 301226 32768 8 11640 15962 416048 459502 32768 16 21215 27521 463971 623722 32768 32 22904 27958 783436 617404 32768 64