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 6 20:42:01 2026 Auto Mode Machine = Linux oleg426-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-oleg426-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 1808 5622 566551 532815 64 8 5394 11889 373966 500060 64 16 3537 18390 969761 763021 64 32 6317 49767 1124074 538156 64 64 3319 22015 1460430 1421755 128 4 3552 10449 250545 58823 128 8 6720 19259 780556 700139 128 16 4056 13399 1048974 857887 128 32 3190 62139 1332828 889145 128 64 3821 61064 346859 1266785 128 128 9437 42118 927549 1684006 256 4 7212 7064 344059 569079 256 8 9070 22426 870974 319204 256 16 12116 15105 1089202 340891 256 32 4795 10368 211042 294999 256 64 9053 39975 1376935 1040643 256 128 10210 118517 1347557 1369908 256 256 5257 23802 38175 1814348 512 4 7268 7482 267206 319005 512 8 7189 10387 173972 262566 512 16 15812 16626 1163439 395062 512 32 11871 64296 1252318 144925 512 64 11416 24732 1282994 1169140 512 128 13211 61213 991998 331156 512 256 22189 72482 93414 1450212 512 512 22111 23064 866338 1770674 1024 4 9227 9349 649001 309931 1024 8 10326 13925 483242 500007 1024 16 21383 26483 988301 621036 1024 32 20122 19139 295617 656040 1024 64 31142 59040 965203 1158358 1024 128 32801 40128 563288 169314 1024 256 31713 83976 797016 912695 1024 512 26848 108063 1607514 668393 2048 4 6299 10263 326107 136880 2048 8 6736 7694 277132 258648 2048 16 18352 19616 254820 243901 2048 32 19615 13968 163397 173324 2048 64 10578 14920 337962 404750 2048 128 13320 19802 486576 156229 2048 256 28138 41992 204557 364415 2048 512 26809 55264 591764 331929 4096 4 5329 5355 165997 252727 4096 8 7320 17362 446383 414234 4096 16 8730 8702 424322 250104 4096 32 19471 11287 678247 502147 4096 64 23697 24606 944218 1055351 4096 128 33059 53210 594833 507112 4096 256 28261 24772 332255 686458 4096 512 28645 44072 925200 486753 8192 4 7517 7475 366137 197688 8192 8 7925 7017 414678 435855 8192 16 14714 21011 455519 288337 8192 32 22409 26927 500339 610885 8192 64 18075 32786 543487 642012 8192 128 29830 27361 399690 347251 8192 256 26932 32643 1038535 821437 8192 512 23450 33882 531261 190330 16384 4 5355 6301 198080 131915 16384 8 6945 8743 200377 362557 16384 16 10990 16502 398938 372439 16384 32 14946 18111 580397 321368 16384 64 20825 25104 580931 257975 16384 128 27185 40196 340546 403049 16384 256 20445 28436 561810 535950 16384 512 21467 17724 841451 589245 32768 4