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 Oct 24 09:22:21 2025 Auto Mode Machine = Linux oleg402-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-oleg402-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 2784 19179 555990 587635 64 8 6535 29302 760859 659861 64 16 5298 46645 653436 842003 64 32 6164 70644 1310683 492717 64 64 6037 19053 1279447 1679761 128 4 9636 13769 711270 301815 128 8 5394 37113 55098 535368 128 16 3991 59069 1391557 985435 128 32 8371 66809 1359835 1007629 128 64 18164 98151 1196221 1231904 128 128 5233 25926 1455701 2035099 256 4 4457 6452 663292 542621 256 8 5344 22877 639967 567575 256 16 21846 48165 1376935 965763 256 32 21923 81142 1375171 1093639 256 64 12313 98918 1354356 1368162 256 128 27556 70660 1445521 988889 256 256 15829 122660 1855098 2000242 512 4 15275 24361 769761 732478 512 8 13609 12243 174623 738777 512 16 23209 53422 869494 973559 512 32 13578 80985 1276891 1094088 512 64 19637 84321 1399189 1066380 512 128 39369 123313 804962 1207261 512 256 15089 131652 1683237 1537424 512 512 39383 125732 1640796 2244430 1024 4 14935 12878 522705 565067 1024 8 21657 32755 842017 829816 1024 16 31490 55938 1020956 957030 1024 32 41024 68476 1345623 1089317 1024 64 34472 30281 1262926 1033237 1024 128 52941 60327 1689730 1347734 1024 256 40510 83927 1676539 1563053 1024 512 39045 125167 1615374 1319577 2048 4 10236 14098 789820 501695 2048 8 17976 19827 313046 861594 2048 16 18329 45284 1053487 865588 2048 32 38225 59302 990330 1083656 2048 64 39926 89667 552307 1272808 2048 128 59998 86420 784984 1209712 2048 256 48173 115745 1634370 1450560 2048 512 58379 64319 1779262 1536439 4096 4 9139 15215 311174 603674 4096 8 20081 19789 610887 646569 4096 16 31183 52316 942043 559171 4096 32 23379 60440 1286418 997333 4096 64 29072 39553 1509680 458474 4096 128 51144 74967 919210 1346510 4096 256 56432 62983 1743829 1396532 4096 512 80571 97712 1671225 1197303 8192 4 9086 8886 348876 504868 8192 8 20647 15210 469993 496120 8192 16 22560 30955 1175181 887531 8192 32 39504 49812 915312 1150547 8192 64 25442 79364 1410741 1281180 8192 128 47257 65737 1499259 724250 8192 256 56634 75069 728056 903803 8192 512 51247 69381 462958 1329258 16384 4 9120 3519 437127 574616 16384 8 19836 19635 836942 716964 16384 16 22355 33010 685892 425534 16384 32 38246 46334 1199317 1041712 16384 64 46291 57552 1323850 1025085 16384 128 48330 58784 685038 763000 16384 256 43008 59319 1673032 682351 16384 512 58201 85071 1609249 1439730 32768 4 12290 14189 218431 416493 32768 8 17406 17515 604922 476472 32768 16 21138 29495 668380 290406 32768 32 20824 30233 747325 672178 32768 64 26734 33682 699560 834491 32768 128 41467 37173 1281544 883188 32768 256 35609 44158 899005 714615 32768 512 36361 40075 1021700 495150 65536 4 8260 10362 458711 235758 65536 8