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: Sun Aug 31 17:37:31 2025 Auto Mode Machine = Linux oleg208-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-oleg208-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 11579 22760 346008 418250 64 8 13394 37958 587635 627470 64 16 16292 48298 659861 538156 64 32 18099 72144 720041 608965 64 64 22091 84206 901377 1226821 128 4 14098 20295 215454 261148 128 8 20715 34916 411456 414314 128 16 26913 42131 761728 578645 128 32 29064 55652 1504659 1306873 128 64 37092 104230 1727352 2027414 128 128 32088 145975 1206978 1319723 256 4 13962 19832 357460 345498 256 8 29260 37994 635423 373111 256 16 36945 65536 635047 858440 256 32 40030 66457 1622442 780445 256 64 32213 91298 1195962 913973 256 128 54238 121549 1686137 1274008 256 256 52544 162348 1274008 2015259 512 4 18285 18276 257683 316047 512 8 25922 32183 362885 581846 512 16 39275 57930 736750 530006 512 32 61545 76439 1073309 685482 512 64 55255 98046 1434711 973118 512 128 58308 129297 1854787 1450212 512 256 70954 135703 2099600 1309596 512 512 68057 164107 1387437 1882427 1024 4 16841 19215 242944 221255 1024 8 26827 29983 379521 383075 1024 16 51834 68780 615341 654341 1024 32 46726 72005 1275301 972414 1024 64 62260 85531 1132697 991266 1024 128 94526 111497 1582636 1284839 1024 256 80452 195716 1422266 2007176 1024 512 105220 159174 1736178 1480101 2048 4 19166 23854 293323 367486 2048 8 41605 40367 479863 512409 2048 16 45252 58101 836915 775698 2048 32 71148 99882 1203273 1194239 2048 64 88071 132718 2031771 1045919 2048 128 118485 168602 1790015 1812296 2048 256 100555 119152 2298122 1830057 2048 512 90069 184073 2202092 2209455 4096 4 22624 23151 318459 397555 4096 8 36442 36303 643710 530852 4096 16 50774 65283 1024513 786019 4096 32 81540 110267 938390 1207570 4096 64 95140 126905 1281142 1024819 4096 128 99931 142633 1306075 1148939 4096 256 112673 119076 2046975 1264173 4096 512 104260 156449 1951413 1462265 8192 4 21221 23226 293485 283008 8192 8 36372 43564 693718 609206 8192 16 61029 68159 855916 1055832 8192 32 76254 93081 1446067 1084628 8192 64 94021 122142 1537224 1306712 8192 128 108810 161473 1987398 1715944 8192 256 101775 142976 1598811 1631531 8192 512 138413 168162 1773881 1956615 16384 4 21044 23118 392723 354416 16384 8 34866 42454 614390 704874 16384 16 57356 68557 709078 1010167 16384 32 86202 104740 1561884 1296305 16384 64 119008 133166 1583441 1686623 16384 128 109610 151420 2241646 2001510 16384 256 118061 197678 2557212 2202137 16384 512 134598 212713 2661399 2232108 32768 4 23367 22656 369163 370013 32768 8 35624 45663 648370 582726 32768 16 51165 60689 1002327 615328 32768 32 69202 87695 1344543 831950 32768 64 89287 115010 1299084 1236620 32768 128 114631 145201 1864367 1491149 32768 256 112053 126857 1424757 1261037 32768 512 103841 140751 1417001 1522535 65536 4 20636 23459 386303 315524 65536 8 31563 37929 560461 596312 65536 16 49788 58474 795977 678553 65536 32 66640 77627 1029891 999996 65536 64 88173 121680 1685418 1521261 65536 128 102866 127866 1619407 1287015 65536 256 108323 143993 2091665 1570328