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: Wed Sep 2 10:34:51 2026 Auto Mode Machine = Linux oleg353-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-oleg353-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 3053 7666 520419 435202 64 8 6126 12225 666414 272300 64 16 4561 36320 874936 763021 64 32 7950 65507 725882 316623 64 64 6077 64905 1143223 1828508 128 4 5713 10730 244275 547377 128 8 7826 17367 146814 232330 128 16 13681 30104 1067750 506097 128 32 7085 46143 1057236 774922 128 64 10843 83277 1217930 1162547 128 128 16510 56165 1162547 785122 256 4 8279 5183 125425 332447 256 8 10924 18300 572721 694167 256 16 11982 18357 894929 644965 256 32 19611 58610 311427 755195 256 64 22632 47406 945356 1052888 256 128 17528 83063 1512726 332036 256 256 20504 71953 1600674 1629830 512 4 7778 9890 310518 418302 512 8 11619 18253 821907 250499 512 16 14371 33268 632765 864942 512 32 21563 45393 1177473 828566 512 64 41340 65289 1028091 1187895 512 128 23937 103126 424168 1251589 512 256 30494 122316 1580419 1242177 512 512 26937 77387 1515722 2124526 1024 4 10812 11898 554131 317140 1024 8 16007 26317 517914 760197 1024 16 22955 24600 544714 310020 1024 32 32779 68443 848337 1124099 1024 64 51328 79951 796277 808874 1024 128 64957 116231 1625154 1283303 1024 256 37591 79931 671004 224999 1024 512 50595 83076 953418 673318 2048 4 11530 14104 594343 288943 2048 8 17560 20607 830201 605402 2048 16 28345 39764 1218982 681264 2048 32 37015 40242 943347 780207 2048 64 35288 83015 1472440 1149338 2048 128 39307 74842 1655793 1048600 2048 256 37470 96104 617234 1379066 2048 512 60168 95057 878603 1587551 4096 4 11851 11019 355214 469937 4096 8 18713 21651 488830 424678 4096 16 31350 30213 1291738 811872 4096 32 31769 48617 701854 832365 4096 64 44411 53235 852099 1022744 4096 128 47135 75018 958601 724833 4096 256 42605 67771 1723881 708892 4096 512 51512 114869 1553922 815959 8192 4 14100 11064 586936 423578 8192 8 15343 15569 485363 478335 8192 16 24330 31388 1404857 676242 8192 32 23196 35944 700592 853959 8192 64 40475 52013 586736 560711 8192 128 40787 56292 961843 854575 8192 256 45448 72410 903186 867061 8192 512 47763 57129 702814 695952 16384 4 3484 9246 316330 290702 16384 8 17344 17171 552354 385707 16384 16 22457 21057 582295 681275 16384 32 23359 42948 516649 931918 16384 64 37165 47246 960711 784667 16384 128 50709 56119 1315663 759929 16384 256 52498 80063 842751 752530 16384 512 51506 85353 1379249 865454 32768 4 10060 11870 393893 359961 32768 8 17547 20688 595402 467479 32768 16 25451 28799 808907 699784 32768 32 41536 47450 883159 1034543 32768 64 45750 62622 944216 866648 32768 128 55860 69793 1287993 856345 32768 256 60221 77340 845389 1152346 32768 512 63752 99876 1040417 1296156 65536 4 11572 11008 488320 354038 65536 8 17629 19517 750335 820245 65536 16 31948 34454