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 Sep 8 16:59:48 2026 Auto Mode Machine = Linux oleg245-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-oleg245-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 6650 16828 633392 143871 64 8 7501 29305 752329 754443 64 16 9832 47021 1105556 889431 64 32 9304 56289 1101022 874936 64 64 5607 76199 1163036 1768283 128 4 6920 15307 843068 352785 128 8 7726 38752 1291158 615109 128 16 10562 44613 1017175 727658 128 32 9632 21483 1152564 1105114 128 64 10320 73656 1406136 1391557 128 128 12655 133456 780556 809997 256 4 9958 17988 516270 927393 256 8 17115 25306 861885 395804 256 16 12863 54455 605332 853662 256 32 16632 32875 1325925 859127 256 64 20555 59825 1080434 958008 256 128 24755 102969 1201314 1487577 256 256 19151 122898 1924938 1704877 512 4 13102 17082 411884 812577 512 8 23624 33496 1176828 662230 512 16 21147 44837 1034530 951558 512 32 40806 57821 1216149 1163439 512 64 42723 49140 1292259 1174254 512 128 40248 117510 1365383 1496706 512 256 33882 88827 1848401 1484293 512 512 45580 79663 1902438 2535981 1024 4 14842 17524 394765 810706 1024 8 22669 32281 1092921 759122 1024 16 33444 53206 1132697 1363565 1024 32 37061 69218 910181 1140517 1024 64 33444 83273 1480101 1084640 1024 128 50203 122166 1424624 1400926 1024 256 66356 114377 1999700 1857840 1024 512 48859 132108 1812371 2207295 2048 4 14985 18344 740971 506308 2048 8 25271 32563 938605 918041 2048 16 31482 53861 1435290 886217 2048 32 43198 70552 1305301 1157079 2048 64 69647 105057 1384846 1186486 2048 128 67015 100549 1052971 1254040 2048 256 51147 125137 1548069 1276022 2048 512 58402 138829 1522550 1535341 4096 4 16595 18943 617607 561639 4096 8 28042 32554 1121269 842984 4096 16 42695 53413 1286803 1017414 4096 32 50172 70796 1662974 1072481 4096 64 66692 96853 1246471 1290089 4096 128 78548 110348 1070276 1488877 4096 256 73080 124114 763013 820205 4096 512 81957 126877 1063847 1656241 8192 4 17414 18148 694587 595439 8192 8 28206 31981 1024019 919304 8192 16 44337 48924 962867 1150702 8192 32 49513 76034 1443273 1340721 8192 64 73561 88767 1675283 1414399 8192 128 78494 105938 1356494 575850 8192 256 87833 103142 1418252 968076 8192 512 90577 96222 1819630 1536124 16384 4 17224 17944 801208 682812 16384 8 27232 32605 873728 878543 16384 16 40633 49411 929271 1140310 16384 32 58335 76598 1594870 1312697 16384 64 70017 95772 1613708 1311144 16384 128 84265 98841 1021945 1581910 16384 256 87032 110761 1444268 1288744 16384 512 82845 119036 2018026 1535671 32768 4