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: Sat Aug 15 20:10:03 2026 Auto Mode Machine = Linux oleg418-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-oleg418-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 8120 16288 463774 290890 64 8 8906 25826 679917 507625 64 16 7278 43012 842003 1638743 64 32 9559 57817 1066042 889431 64 64 11996 59483 695778 1518251 128 4 8154 14361 546819 592046 128 8 14247 27928 877518 633995 128 16 12474 48524 1391557 1032829 128 32 10524 68020 1471662 1048974 128 64 26218 84151 2286447 1471662 128 128 16878 85450 1526043 1618028 256 4 13270 18130 701422 446684 256 8 17971 31975 825443 627256 256 16 31995 58716 944525 1089202 256 32 26817 82634 1325925 1213534 256 64 34220 83966 1248819 1391207 256 128 31785 124451 1495866 1855098 256 256 46886 169071 2247235 3557725 512 4 14265 17907 561315 559560 512 8 18377 32409 1084694 884172 512 16 34606 58235 1322500 971357 512 32 35400 66632 1196499 1075998 512 64 36258 83716 1329871 1254513 512 128 51561 119405 1575781 1438555 512 256 66483 135635 2030130 1747618 512 512 38507 131587 1657257 1954379 1024 4 15005 18124 856115 674587 1024 8 25546 33516 925877 1238168 1024 16 33052 51107 1379773 1101046 1024 32 52496 77154 1521524 1473500 1024 64 52277 108257 1910737 1253344 1024 128 67368 131064 1687075 1190795 1024 256 62340 127270 1715375 1521524 1024 512 73531 165855 1765437 1665486 2048 4 16599 18425 906990 765604 2048 8 25996 30113 933809 906607 2048 16 39505 49159 1223496 1080113 2048 32 57198 70274 1343057 1158327 2048 64 66729 91937 1316907 1407538 2048 128 76612 128216 1791882 1480817 2048 256 52873 117627 1948800 1671907 2048 512 76928 153914 2398213 1606254 4096 4 16489 17996 692490 775726 4096 8 27989 29162 872260 921725 4096 16 41772 49685 1397895 980373 4096 32 55783 84089 1106750 1340312 4096 64 70138 95125 1713735 1480792 4096 128 71015 129428 1647505 1342932 4096 256 74651 135168 1997239 1644981 4096 512 87369 129592 1985468 1853314 8192 4 16402 17510 696771 595697 8192 8 25898 29873 1025547 926692 8192 16 44309 47664 1248364 1182624 8192 32 60630 81682 1633160 1468126 8192 64 69829 99177 2179383 1741514 8192 128 87084 136832 2007837 1301514 8192 256 97467 132868 2072384 1694952 8192 512 100545 133742 2036759 1693615 16384 4 17538 17723 641477 593966 16384 8 29075 33650 1094314 979847 16384 16 46174 54055 1411054 1035121 16384 32 64935 76565 1484452 1299172 16384 64 70907 98020 1625695 1504933 16384 128 86036 116336 1967809 1555485 16384 256 91754 108824 1781644 1551236 16384 512 91761 121455 1905338 1692564 32768 4 15709 15606 625342 618392 32768 8 26244 26949 1040157 926039 32768 16 40669 46099 1306232 917949 32768 32 55654 68304 1413692 1275762 32768 64 70873 94183 1691872 1402670 32768 128 79924 109836 1711572 1541593 32768 256 87607 120538 1642831 1635694 32768 512 91193 125032 1979709 1606124 65536 4