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 Jun 16 21:49:50 2026 Auto Mode Machine = Linux oleg358-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-oleg358-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 10787 17669 560635 727850 64 8 14506 31127 863676 752329 64 16 19053 59867 998622 780776 64 32 15541 69187 1163036 1070292 64 64 23997 132507 969761 1892980 128 4 12882 20002 774922 852438 128 8 20394 38288 1022989 1142750 128 16 27061 52697 947186 809997 128 32 24888 93290 1658003 1642783 128 64 40817 144133 1622919 2027414 128 128 44064 187729 1539168 1967960 256 4 12641 20757 662883 603630 256 8 28368 31616 879535 844929 256 16 35310 66065 1016025 907792 256 32 42631 81271 1422540 1506359 256 64 56041 123138 2118645 2045979 256 128 65341 157560 2665657 1729594 256 256 58207 209518 2247235 2783115 512 4 17698 22018 969603 815353 512 8 21588 36524 1387437 783808 512 16 54375 62210 2107844 1270094 512 32 46503 105156 1537424 1299295 512 64 81062 140085 1442420 1585086 512 128 75095 186789 1475116 1286067 512 256 108938 155200 2089386 2532990 512 512 72213 270470 2071249 2560168 1024 4 17903 20345 784783 646461 1024 8 35856 38169 925877 764255 1024 16 43034 53494 1452570 1075676 1024 32 65444 88481 1995982 1540074 1024 64 75617 125536 1657133 1420384 1024 128 100531 144510 2020395 1711956 1024 256 100088 218798 2165014 1467458 1024 512 101096 232728 1620249 1437980 2048 4 17977 19846 789239 736713 2048 8 30078 33239 962910 1161617 2048 16 47225 63948 1259557 1177702 2048 32 63762 82998 1466909 1430986 2048 64 87282 117775 1658350 1441311 2048 128 96526 140990 1662201 1623865 2048 256 100915 150400 2008023 1906837 2048 512 105025 192375 1706788 1642181 4096 4 17761 19285 471834 678836 4096 8 31156 35146 978251 801232 4096 16 48792 58190 1136850 1178414 4096 32 69245 87622 1599942 1500843 4096 64 78305 121076 1891888 1335519 4096 128 92770 159458 1975877 1611951 4096 256 131009 170445 2085490 1443224 4096 512 118570 196422 2494606 1599346 8192 4 18716 18735 681702 614919 8192 8 31257 34347 1008746 808924 8192 16 49067 59552 1320015 1291923 8192 32 68429 90225 1928826 1281371 8192 64 89402 117280 1888021 1368542 8192 128 100047 151018 1886673 1677000 8192 256 113100 151077 2304969 1799994 8192 512 93620 189144 1989238 1679377 16384 4 18143 20075 830448 789019 16384 8 33204 34650 1164701 975065 16384 16 49339 58773 1533341 1339122 16384 32 68997 90308 1649618 1375302 16384 64 97878 123885 2089258 1561848 16384 128 102574 148205 2138341 1809797 16384 256 100697 164069 2111599 1698714 16384 512 130791 179856 2086847 1698882 32768 4 18471 19580 802803 700994 32768 8 30868 33757 1221410 1104044 32768 16 50969 59283 1346862 1206697 32768 32 70340 86623 1603276 1558586 32768 64 94663 123549 1949770 1447856 32768 128 107192 144725 1797461 1629527 32768 256 104675 154020 1733943 1586911 32768 512 110559 175432 2285400 1768868 65536 4 17722 19336 908066 738707 65536 8