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: Mon Jul 13 14:24:54 2026 Auto Mode Machine = Linux oleg441-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-oleg441-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 2975 9227 555990 520419 64 8 3297 17344 566551 901377 64 16 1626 39120 1013707 1066042 64 32 4809 31466 1518251 1033216 64 64 1631 43068 1599680 1722886 128 4 2882 3925 618653 462100 128 8 5975 16989 294853 753179 128 16 4458 8899 914904 233950 128 32 2874 30088 800337 345965 128 64 3986 19277 408949 767171 128 128 6901 18768 1332828 1967960 256 4 5524 6018 461267 528987 256 8 3097 12952 977189 867455 256 16 8738 22525 962301 995306 256 32 5872 43919 977189 904732 256 64 11342 62547 1398455 1334162 256 128 5490 51822 1430119 1662639 256 256 10005 31967 1319408 1755037 512 4 6105 6280 111936 324648 512 8 4897 8615 859060 510964 512 16 12472 19681 788992 328823 512 32 10326 23855 796306 1096322 512 64 15599 52357 914287 951558 512 128 22402 69547 1089094 934173 512 256 12206 55208 990168 992456 512 512 15618 72133 1471074 687237 1024 4 6480 8948 668393 150458 1024 8 8392 10787 506672 343163 1024 16 15935 20306 1089593 970656 1024 32 25685 24095 584205 1108434 1024 64 21696 32787 1037480 361961 1024 128 17472 52445 1466957 1270773 1024 256 25574 41449 1689730 253842 1024 512 13591 36284 197380 587482 2048 4 4386 5036 169060 186673 2048 8 13143 7977 237620 211242 2048 16 6724 30489 978039 778651 2048 32 18825 39936 748264 320092 2048 64 15772 33709 1006341 624186 2048 128 19173 29577 663632 318454 2048 256 14635 35210 1448358 345701 2048 512 28331 42665 714529 537953 4096 4 5112 4798 210969 301175 4096 8 6439 7217 256080 206804 4096 16 16608 12561 379256 371691 4096 32 18729 19756 1027331 359420 4096 64 27422 43941 570157 263120 4096 128 23543 30157 1184181 202684 4096 256 44684 50365 1766239 1485145 4096 512 54947 26179 1796530 369874 8192 4 2075 4437 297554 258284 8192 8 8446 6792 223356 456554 8192 16 12853 15032 566134 323462 8192 32 15046 25513 740690 574713 8192 64 23544 27028 491571 313521 8192 128 19842 31589 807328 490952 8192 256 25505 36096 444344 448954 8192 512 24851 32597 604437 869628 16384 4 4383 5015 350107 345647 16384 8 9178 10715 292243 346267 16384 16 10808 15863 478531 585540 16384 32 15382 24120 719223 632637 16384 64 18997 29308 840638 509294 16384 128 26729 31039 439757 434521 16384 256 30529 44710 1146608 766070 16384 512 33346 50631 556636 456265 32768 4 5059 4879 325183 250778 32768 8 8611 8673 425326 338554 32768 16