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: Thu Sep 3 21:34:45 2026 Auto Mode Machine = Linux oleg639-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-oleg639-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 2173 2746 582535 284418 64 8 3370 15783 831569 780776 64 16 2597 14936 789967 503814 64 32 2859 59814 633392 1232453 64 64 2292 62444 1304314 1947927 128 4 4655 8189 703810 529038 128 8 2228 9992 731625 711270 128 16 6054 17020 1051027 615109 128 32 4432 60575 786271 992724 128 64 6137 27604 1175271 718889 128 128 5061 32439 1391557 1885042 256 4 8028 6046 562815 342741 256 8 9910 13836 750445 764334 256 16 11065 32913 337781 697776 256 32 12913 14879 1197295 944525 256 64 3135 21248 1292410 904732 256 128 5994 8608 1455317 630202 256 256 10157 35520 592636 2205688 512 4 9286 5994 408281 417245 512 8 4554 7143 280101 81647 512 16 13875 15575 513039 512549 512 32 16870 29743 259395 984720 512 64 9345 36587 1300082 563229 512 128 5114 66209 1429934 1391032 512 256 12710 44008 1753325 1391933 512 512 7855 54906 442524 1848401 1024 4 11419 9938 211399 254158 1024 8 10084 10359 334530 454936 1024 16 18806 27685 976172 352832 1024 32 24755 50257 600879 443658 1024 64 16233 42654 430624 339206 1024 128 19839 37791 814087 504174 1024 256 19827 27775 848504 1304348 1024 512 17476 113312 519480 1486247 2048 4 7387 4347 147647 107953 2048 8 5151 11343 586992 803187 2048 16 18638 35599 533046 754045 2048 32 27032 43196 1277540 672149 2048 64 13769 33027 426748 279249 2048 128 24584 35310 580997 1192747 2048 256 21574 18822 838303 370882 2048 512 29744 51297 812763 606256 4096 4 7034 5413 200578 118893 4096 8 8580 19523 577071 407320 4096 16 27975 13294 632687 301979 4096 32 17036 26285 1083301 711977 4096 64 20056 46532 636225 339665 4096 128 26718 40778 499257 808509 4096 256 30898 36392 987246 895493 4096 512 57971 30012 1152175 1156363 8192 4 6023 2346 259544 141966 8192 8 10069 10046 377182 262850 8192 16 21171 15954 447230 401137 8192 32 26217 29517 463952 427376 8192 64 26219 27715 697308 797657 8192 128 22723 63081 882856 456178 8192 256 30719 47445 765032 537737 8192 512 40792 36698 725335 547523 16384 4 6398 7994 242632 266983 16384 8 10748 9512 643954 306283 16384 16 14273 21959 428127 610726 16384 32 23590 32441 758947 820023 16384 64 25534 46501 864082 879015 16384 128 31447 44702 475686 328251 16384 256 56220 45426 748164 608795 16384 512 37693 79786 454632 1063624 32768 4 8566 7751 290233 359676 32768 8 10719 9887 290828 199418 32768 16 11558 13121 363826 369958 32768 32 13319 25686 808627 771774 32768 64 27134 20120 559669 452752 32768 128 24938 50842 955978 716410 32768 256