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 Jul 8 22:05:25 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 5970 16521 621657 566551 64 8 5485 22695 743988 704914 64 16 5910 39505 1363961 763021 64 32 9536 60203 2067979 1049372 64 64 10212 72888 1330167 2892445 128 4 9699 17330 633247 463696 128 8 11169 27820 624409 655675 128 16 13748 50816 1102844 790905 128 32 13426 53267 1123617 992724 128 64 12000 84046 1022989 1281909 128 128 15341 119495 1332828 1142750 256 4 12199 16831 713067 570288 256 8 18285 28368 879535 1114064 256 16 23655 44896 1629830 1062263 256 32 20733 59909 513063 889002 256 64 28319 72355 1868008 1802167 256 128 28092 109400 1439707 590031 256 256 31639 125792 2330140 3654598 512 4 12890 17140 571320 643381 512 8 21294 28754 1190529 779258 512 16 32576 46972 966113 1028091 512 32 35807 78888 1123275 1057974 512 64 34803 99301 1075459 1684557 512 128 40213 111837 1795846 1459080 512 256 49703 122052 1640796 1620980 512 512 35926 125983 1759070 2995907 1024 4 13483 16839 521372 392313 1024 8 22335 30007 902340 500240 1024 16 37236 46053 1638171 1227903 1024 32 39765 60923 1211964 1163693 1024 64 58753 88842 793189 1213334 1024 128 65801 114094 657244 1340164 1024 256 63472 144287 814087 1558516 1024 512 62599 125812 1855433 1204825 2048 4 15610 16275 666206 634655 2048 8 24902 29544 938605 1136414 2048 16 35351 47172 1325442 1019479 2048 32 54972 74850 1680082 1231389 2048 64 71696 101260 1476490 1224892 2048 128 69950 104330 959682 1432179 2048 256 74557 116336 967356 1433135 2048 512 68246 140706 1617749 1668983 4096 4 15325 16631 689212 714583 4096 8 26756 29828 1089346 841952 4096 16 41423 45374 1310259 1087622 4096 32 47217 60698 487499 1226362 4096 64 60646 88854 1587523 1281524 4096 128 71673 90591 1789605 1412840 4096 256 77531 125275 1757925 1431559 4096 512 79549 128216 1837653 1727695 8192 4 15068 15036 588545 536336 8192 8 25771 26940 1099729 865140 8192 16 39004 42662 1081589 1132907 8192 32 55362 63966 1516463 997791 8192 64 69820 83024 1685225 1350682 8192 128 81003 90477 1822816 1411436 8192 256 82574 108926 999998 1646306 8192 512 85759 122338 1598141 1464184 16384 4 15234 16899 743751 652750 16384 8 26098 28180 1192512 904646 16384 16 42353 49208 1097022 1104569 16384 32 60262 67959 1458429 1309570 16384 64 71650 92135 1580237 1347815 16384 128 84980 101922 1737059 1242064 16384 256 90080 113057 1933211 1683318 16384 512 92430 130204 1833506 1756237 32768 4 15851 16331 629198 660244 32768 8