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 Oct 22 04:30:22 2025 Auto Mode Machine = Linux oleg125-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-oleg125-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 9650 17956 571375 639427 64 8 11490 20505 1143223 789967 64 16 12277 40024 926260 855419 64 32 15165 77185 292156 916769 64 64 15872 90662 1452528 1599680 128 4 11034 16646 785122 618653 128 8 17064 28660 1377278 940549 128 16 18859 48891 1778862 248573 128 32 13502 68857 371073 402510 128 64 24096 96911 2027414 1885042 128 128 28907 119071 1755594 2211113 256 4 12722 17611 557844 372076 256 8 16980 34684 831194 434571 256 16 25204 53658 1755037 894929 256 32 32352 71251 1201314 1280084 256 64 32695 87768 1600674 988889 256 128 43375 113123 735537 1224606 256 256 35334 113123 2285501 1884399 512 4 18249 19613 962218 418955 512 8 19166 30176 893740 658170 512 16 27472 54168 1347393 655558 512 32 37744 56324 1565443 1267097 512 64 49732 107294 1753325 1117430 512 128 48370 121068 1283761 1789859 512 256 47711 102320 2391924 1938502 512 512 49670 95203 1002183 659788 1024 4 15620 18863 793775 580808 1024 8 23605 30849 753000 958739 1024 16 40097 48048 800731 1061060 1024 32 45501 81919 994020 716567 1024 64 43030 94474 996094 1044799 1024 128 56109 114043 1638171 1473500 1024 256 58454 116099 1024854 1732676 1024 512 77723 138525 1582636 2039583 2048 4 15965 18201 541241 485065 2048 8 27599 34755 741995 654530 2048 16 39875 48804 1228571 817559 2048 32 64642 71796 1142156 683106 2048 64 63958 101592 1085848 910548 2048 128 75649 91510 1361794 1144133 2048 256 75155 117378 1151187 1293702 2048 512 72887 126031 1241175 1666393 4096 4 16301 18747 682314 539521 4096 8 25971 30297 508313 597855 4096 16 42131 48201 931723 934511 4096 32 44746 73142 1186143 730256 4096 64 56117 92785 1244214 908804 4096 128 73939 111319 1917437 1187619 4096 256 67105 105605 1443346 1391780 4096 512 63303 105341 1148325 1309061 8192 4 16345 18152 642012 483308 8192 8 25688 29411 880098 707240 8192 16 39615 51704 997096 817975 8192 32 52405 72148 1189132 800221 8192 64 67116 90457 1401991 1215980 8192 128 68905 92084 1779393 1102269 8192 256 83072 118311 1453777 1404685 8192 512 74903 120366 1785124 1543023 16384 4 16807 17975 545878 441251 16384 8 28754 32785 971014 759609 16384 16 47976 55133 1107328 943938 16384 32 59117 79367 933881 1021504 16384 64 72288 101536 1332242 1193402 16384 128 80040 111656 1358876 1227817 16384 256 75242 118947 1770080 1182193 16384 512 85340 118997 1570701 1353150 32768 4 17086 18784 571707 500169 32768 8 28977 32085 860527 671007 32768 16 40354 50445 1013735 861141 32768 32 56768 74181 1306381 1144048 32768 64 67251 86983 1448115 1369789 32768 128 72878 106907 1591303 1311355 32768 256 85808 108125 1500788 1106052 32768 512 81275 106836 1476840 1251301