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: Tue Sep 15 09:58:15 2026 Auto Mode Machine = Linux oleg633-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-oleg633-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 5515 7261 128265 481234 64 8 3969 8146 695778 666414 64 16 6694 48125 453587 640954 64 32 4277 44108 1163036 301678 64 64 2908 43656 1452528 1452528 128 4 4629 12202 514339 503723 128 8 5230 16537 901083 501839 128 16 8063 36065 1185654 805138 128 32 10801 33853 1093856 329812 128 64 6174 36457 561107 1240443 128 128 9282 52332 1155043 1622919 256 4 8605 6131 616807 321980 256 8 9576 16565 827989 500857 256 16 8100 13770 122310 898674 256 32 19695 54353 1463250 1361224 256 64 14861 68980 1243036 1163562 256 128 20413 37992 999940 707430 256 256 17353 103097 1829808 2049885 512 4 5108 15581 591951 389969 512 8 11420 26034 946526 690108 512 16 28720 22049 1286838 915847 512 32 27599 30811 906185 1096322 512 64 19662 65140 1254513 1222379 512 128 13883 29158 1640796 922535 512 256 21352 123854 1657257 820650 512 512 28649 88214 1492545 145337 1024 4 8845 9973 312002 399204 1024 8 10138 11510 166395 829175 1024 16 23288 23240 1245710 694214 1024 32 19780 52408 1350701 1153071 1024 64 38877 51861 1446211 1136593 1024 128 47908 89393 1448162 1261072 1024 256 25044 117298 1662907 892589 1024 512 47243 40000 832550 1466957 2048 4 9161 9111 344606 254789 2048 8 11162 15873 710099 813995 2048 16 19802 28854 448330 410337 2048 32 19295 24517 585791 1135963 2048 64 25600 35626 734320 807263 2048 128 46198 49600 1025075 1436250 2048 256 53232 66291 424366 612612 2048 512 33617 103954 1515833 1408461 4096 4 9430 7761 311676 295721 4096 8 14997 13241 504877 461206 4096 16 14258 20592 610605 539741 4096 32 32599 33363 619858 538658 4096 64 45433 35592 647983 466403 4096 128 42478 63244 593887 555249 4096 256 38633 64701 634158 861759 4096 512 25333 59133 726243 538304 8192 4 7402 9059 362074 360801 8192 8 2283 14617 257382 312194 8192 16 16499 17227 523379 455567 8192 32 26903 33078 755029 482250 8192 64 29641 35432 833533 376401 8192 128 37981 45603 595821 467690 8192 256 31622 60779 467741 558760 8192 512 28933 54498 955690 660868 16384 4 6081 8268 264155 155173 16384 8 15948 13438 623578 525768 16384 16 13775 22750 761520 531790 16384 32 24096 34997 821337 785268 16384 64 36275 47539 717211 781011 16384 128 43670 54369 678564 944820 16384 256 37948 47590 1643660 667180 16384 512 48409 79985 493554 906603 32768 4 9784 8956 441469 270099 32768 8 15483 16373 420641 326588 32768 16 25764 27838 894395 553326 32768 32 29725 50685 539622 721938 32768 64 37030 59108 903396 656858 32768 128 48272 54644 649566 894128 32768 256 45907 62558 890317 604965 32768 512 44299 71543 842864 720017 65536 4