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 Mar 30 08:48:31 2026 Auto Mode Machine = Linux oleg620-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-oleg620-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 2388 6234 686877 598110 64 8 4663 26644 852702 752329 64 16 6382 46045 592827 158387 64 32 7230 39728 1392258 1087638 64 64 8205 38624 1279447 158855 128 4 3973 14192 522346 339618 128 8 6701 22947 826202 592046 128 16 7769 36952 1030846 627328 128 32 8955 18308 1074159 757430 128 64 10914 59953 615109 144638 128 128 10688 41531 1319723 93763 256 4 6606 7905 682691 515032 256 8 8387 25865 691930 433169 256 16 11284 12647 278835 962301 256 32 25500 74768 260439 977189 256 64 11904 58302 1489641 567575 256 128 26674 85245 1369908 1430119 256 256 21052 61912 1642294 2045979 512 4 9095 10847 718028 424168 512 8 13550 17983 1038532 528962 512 16 24399 25077 890404 946526 512 32 24234 44517 761841 1038532 512 64 16989 37401 1199171 1024169 512 128 44122 97600 681782 1514652 512 256 32000 87520 1182010 1574625 512 512 35602 112753 343608 684608 1024 4 9501 15174 268774 305848 1024 8 16723 28330 335864 1102176 1024 16 18117 31195 555924 535011 1024 32 19518 48715 547003 687216 1024 64 24201 41157 1183902 700898 1024 128 32925 93705 1023145 1207534 1024 256 51483 63397 792457 851870 1024 512 40090 102935 127014 759659 2048 4 10303 10819 665174 412070 2048 8 15315 18528 472862 760790 2048 16 20768 29214 1011913 852615 2048 32 33584 43635 424638 1475476 2048 64 49442 79611 1157703 500001 2048 128 28225 70730 1105837 1240458 2048 256 46583 123924 577715 416687 2048 512 42560 108999 1131474 882756 4096 4 9521 9206 494501 459762 4096 8 17189 13868 656828 538810 4096 16 20416 23144 892145 731562 4096 32 32244 43293 1342932 646885 4096 64 43582 58858 1582697 896661 4096 128 48995 69443 1648296 518296 4096 256 55183 87648 576084 1257234 4096 512 54932 82340 1369808 1049998 8192 4 8480 11342 341233 314471 8192 8 18064 16709 473445 388782 8192 16 23184 28359 894533 800463 8192 32 33237 41313 876796 865053 8192 64 31808 57178 709636 494685 8192 128 43558 64133 970043 1086343 8192 256 3552 85854 1579336 1438741 8192 512 56146 91052 1314711 1158852 16384 4 10730 12024 434208 312988 16384 8 15666 17912 485437 525563 16384 16 36281 39976 1287054 645751 16384 32 44795 49055 1094750 561517 16384 64 50315 78017 694474 769450 16384 128 67246 75372 994294 1001905 16384 256 56385 89156 1026371 758093 16384 512 64177 92374 1128847 1158379 32768 4 11114 12005 526816 417193 32768 8 17550 19758 615824 742468 32768 16 26050 35028 975873 704219 32768 32 46767 58556 1120278 909518 32768 64 47234 54837 1013301 755247 32768 128 45752 65999 938804 1074465 32768 256 61513 85026 1201212 1350037 32768 512 74883 82115 932739 917533 65536 4 10493 11553 394676 375665 65536 8 14983 16536 491351 546775 65536 16