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 Mar 11 08:45:59 2026 Auto Mode Machine = Linux oleg410-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-oleg410-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 9155 17043 688639 424198 64 8 8700 31084 877797 1163036 64 16 15432 49730 1947927 1768283 64 32 17901 86709 1279447 1991276 64 64 8114 117026 686877 1648808 128 4 10927 18544 280818 490380 128 8 10348 31471 1009524 780556 128 16 19526 30993 492629 1598754 128 32 27467 67685 1303699 948860 128 64 17091 108660 1231904 870405 128 128 13890 151452 2464907 1802755 256 4 8664 15003 697322 571502 256 8 17902 33661 1168627 1147398 256 16 24556 55185 1292410 904732 256 32 31407 78119 1398455 965763 256 64 39083 113975 1400278 1339154 256 128 38525 140822 1532153 1453348 256 256 50903 178903 1610276 1686137 512 4 15948 16437 675350 977103 512 8 24675 34711 909255 864942 512 16 42285 58074 1160923 981121 512 32 48994 98270 1276891 1080328 512 64 58754 124457 1747618 1418599 512 128 32197 183517 1589779 2097550 512 256 63124 180025 1541840 1614885 512 512 66082 213684 1650887 1740536 1024 4 16490 17605 656842 709582 1024 8 21049 34663 900637 786507 1024 16 40224 44277 840698 935151 1024 32 52838 94134 1721563 1223356 1024 64 55202 102429 1796451 1506051 1024 128 83558 130980 1289855 450735 1024 256 77593 187407 1741810 1575091 1024 512 88810 175156 2421329 1116792 2048 4 16078 16253 854396 752393 2048 8 25919 34277 1036955 946882 2048 16 42037 55242 1199074 1009297 2048 32 61839 78440 1469167 925858 2048 64 49715 66026 1431225 1272808 2048 128 81131 151466 1742802 1449336 2048 256 93247 158955 1625402 1989882 2048 512 109919 183695 2398213 1692662 4096 4 17387 20263 869655 783331 4096 8 30916 32741 1086178 1103196 4096 16 47946 58415 1254847 1070276 4096 32 70008 82326 2065432 1245386 4096 64 80286 123929 2289792 1906796 4096 128 108852 130746 1621536 1474438 4096 256 122370 185128 2392470 2047951 4096 512 90345 128877 2203167 1707264 8192 4 19097 19859 711237 636812 8192 8 30640 33090 1188432 1075361 8192 16 50021 61112 1317686 1067941 8192 32 66908 87535 1528879 1304430 8192 64 85086 113693 1714916 1433937 8192 128 98127 150053 1713890 1657264 8192 256 107999 151664 1832245 1430653 8192 512 121380 183134 1785124 1940262 16384 4 18659 19799 907993 813712 16384 8 34142 38882 1400928 1162317 16384 16 53162 63420 1689775 1180994 16384 32 80641 93170 1554922 1540560 16384 64 100220 122840 1889309 1699386 16384 128 104711 146428 2294028 1623775 16384 256 110215 176268 1775476 1461407 16384 512 114740 168355 2128868 1889517 32768 4 18891 20011 1130870 775646 32768 8 32475 35829 1176463 1052383 32768 16 50569 59323 1675251 1297379 32768 32 71259 86582 1726797 1650862 32768 64 93673 130129 2084499 1570178 32768 128 105986 152021 2032374 1839145 32768 256 113825 157990 2072616 1744662 32768 512 116558 179209 2030363 1890941 65536 4