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 Jun 17 06:50:51 2026 Auto Mode Machine = Linux oleg239-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-oleg239-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 10051 20169 1066042 528618 64 8 13445 33313 1066042 1363961 64 16 14712 61415 1828508 1183548 64 32 16784 55269 1255511 799377 64 64 17025 120277 1492919 1599680 128 4 13133 14204 1133103 1040839 128 8 18060 33702 940549 1266785 128 16 17390 38334 1229084 1281909 128 32 20106 51947 1598754 1885042 128 64 23192 105770 2175277 2608629 128 128 27863 71271 1359835 1827299 256 4 15040 19538 740100 422432 256 8 14125 25702 1108314 965763 256 16 25738 37926 1300235 1280084 256 32 30406 59979 1729594 1907837 256 64 24042 110674 969251 947860 256 128 35970 126548 1325925 1829808 256 256 35624 74334 1662639 1729594 512 4 12670 15586 891884 893368 512 8 25505 36299 1303238 1273861 512 16 29430 54976 1414860 1199171 512 32 47994 96166 2285029 1550747 512 64 61142 110179 2532990 2244430 512 128 51711 126020 899731 2097550 512 256 48503 120558 1542947 1501940 512 512 55238 76806 1933266 2460437 1024 4 14659 15768 822506 681761 1024 8 25743 34256 1248607 977950 1024 16 31537 33587 1563622 1367473 1024 32 57350 96211 1995982 1837965 1024 64 55971 91093 2246550 1942715 1024 128 83326 131349 1352402 1097669 1024 256 74299 151210 2011877 1800216 1024 512 65032 135041 2165014 1248607 2048 4 16738 19630 1060642 886217 2048 8 23669 38801 1385516 1511565 2048 16 48683 59023 1662201 1655793 2048 32 75200 81809 1152577 945527 2048 64 76204 82136 1471432 1322178 2048 128 77315 112576 1854954 1332432 2048 256 75505 135225 1645012 1702391 2048 512 77125 132583 1630338 1259372 4096 4 18597 20943 883156 883156 4096 8 32286 36102 1130566 955721 4096 16 44110 61589 1669763 1658319 4096 32 77575 73339 1517012 1383709 4096 64 70145 106727 1543313 1474944 4096 128 66020 122520 2149954 1790911 4096 256 105471 148405 2162674 1623375 4096 512 112228 181182 2423862 1794840 8192 4 19230 20408 939668 769124 8192 8 31340 36570 878298 1017258 8192 16 50598 60317 1698219 1608842 8192 32 62347 82951 2037242 1187898 8192 64 89787 122864 2373105 1635103 8192 128 94015 134961 2319440 2032302 8192 256 103084 163499 1983039 1359446 8192 512 107471 167751 1906458 1671859 16384 4 19670 21088 661445 606608 16384 8 28841 35870 1135731 646772 16384 16 41438 50475 1447981 1231138 16384 32 62394 76464 1768531 1110405 16384 64 87825 93070 1478035 1481348 16384 128 87510 111006 1526665 1325765 16384 256 94112 139086 2260151 1707706 16384 512 94092 142804 2010293 2158084 32768 4 17842 20585 663748 640013 32768 8 30144 32786 1076299 844101 32768 16 52492 52972 1577060 1408592 32768 32 66140 80793 1787084 1707829 32768 64 84520 106694 1797085 1416198 32768 128 85592 123553 1786201 1785923 32768 256 92187 131775 2311693 1582216 32768 512 92086 152568 2293523 1864241 65536 4 17666 20423 927285 926485 65536 8 30909 34101 1397953 1255243 65536 16