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: Fri May 29 16:28:10 2026 Auto Mode Machine = Linux oleg107-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-oleg107-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 4502 5931 587635 557144 64 8 6667 19058 799377 346008 64 16 5811 35261 49730 855419 64 32 8567 46211 1279447 983980 64 64 10849 93864 1330167 2561267 128 4 12194 12364 1040839 526961 128 8 10166 26272 1642783 1332828 128 16 15191 53336 358677 969421 128 32 5799 89332 1133103 1007629 128 64 22221 80204 2211113 1363288 128 128 11424 116261 1732927 1727352 256 4 15050 13942 686182 509895 256 8 17658 23458 924200 619655 256 16 26641 48724 1185399 1354356 256 32 14340 106271 1347557 1128110 256 64 9902 61259 1016025 1300235 256 128 48094 192054 1230218 773697 256 256 43191 137857 1752173 1639786 512 4 16299 17763 352115 497470 512 8 15241 27385 705294 759416 512 16 30292 33681 627404 899731 512 32 29655 60605 1970519 1147892 512 64 39042 86620 1729323 1501940 512 128 65464 196084 1350783 1411141 512 256 35796 91836 1550747 1501940 512 512 57225 171185 1399189 1476130 1024 4 16521 13997 625559 678102 1024 8 27526 32838 362971 806293 1024 16 44118 58504 1638796 680897 1024 32 48644 91830 1052480 675011 1024 64 64273 117767 1822368 1584972 1024 128 74213 138713 1512415 1370527 1024 256 89190 153937 1865101 1638171 1024 512 67715 182138 1942715 1910737 2048 4 16845 18660 783767 652889 2048 8 29941 34180 1117345 932188 2048 16 42661 51073 1475476 1009890 2048 32 74243 90057 1375532 1565847 2048 64 80877 104345 1850160 1633438 2048 128 94743 118367 1391351 1709505 2048 256 97514 99702 1763917 1183707 2048 512 113955 137384 2056087 1301149 4096 4 16817 17385 582984 532778 4096 8 23087 25932 950119 890434 4096 16 38502 52972 1691130 1183528 4096 32 49347 85850 1478753 1315778 4096 64 58311 52969 686211 1142901 4096 128 89490 135418 1579060 1365779 4096 256 82046 143256 2218817 1727521 4096 512 91989 82125 1394605 1553360 8192 4 15773 16037 588333 558115 8192 8 24211 30074 742771 534450 8192 16 46598 39079 1362843 802745 8192 32 56794 68467 1308204 724953 8192 64 74571 118664 1125412 838393 8192 128 77601 129628 957234 1498997 8192 256 76978 138096 1256995 1152013 8192 512 84628 159619 1800088 2083948 16384 4