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 Aug 27 16:34:10 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 2122 9803 226183 423529 64 8 2026 4880 727850 581273 64 16 5496 20852 453587 799377 64 32 2174 36547 1087638 743988 64 64 2260 54374 929467 1599680 128 4 7161 12854 636249 476031 128 8 3630 11677 992724 579270 128 16 9149 23821 1093856 927549 128 32 13245 59369 1162547 1165070 128 64 8128 39517 1000121 1196221 128 128 10014 63207 1471662 546819 256 4 9277 5119 567575 226728 256 8 6938 7865 955451 822913 256 16 15963 49306 795478 1673001 256 32 7225 42931 1300235 504861 256 64 13774 64532 215316 1327564 256 128 18443 81549 1543163 1479379 256 256 9371 72955 402632 1642294 512 4 3118 5092 554217 379226 512 8 6283 20008 526756 233477 512 16 23078 12324 551654 523035 512 32 11332 35990 757274 612376 512 64 18569 29897 391390 862164 512 128 13745 45257 896725 626672 512 256 17182 31803 1514652 633699 512 512 23221 34455 231041 797489 1024 4 5584 6267 164018 251848 1024 8 7228 11673 178053 199073 1024 16 7044 10103 930088 122312 1024 32 26263 14349 680789 976172 1024 64 19678 26217 401256 388164 1024 128 36367 54150 872995 478291 1024 256 17969 37266 1129123 1046071 1024 512 25322 37799 353937 168477 2048 4 2326 3977 118060 188302 2048 8 6778 11352 284163 142359 2048 16 8527 14511 1092894 582494 2048 32 10277 28692 690964 479193 2048 64 13035 65077 674577 429973 2048 128 39557 71356 778440 445910 2048 256 27778 77207 779287 1082427 2048 512 29773 63899 910258 1518244 4096 4 5215 7621 381589 233909 4096 8 9107 11018 208024 315778 4096 16 12305 10829 433891 684844 4096 32 44386 56121 495228 359676 4096 64 24837 85812 865231 678273 4096 128 38416 49221 869479 670596 4096 256 19905 36273 1117331 1120099 4096 512 58269 57557 1209696 726488 8192 4 5519 8260 143815 186368 8192 8 7263 16235 467334 579756 8192 16 24775 24746 956221 751150 8192 32 13838 18583 302154 410281 8192 64 14306 13291 278914 329897 8192 128 32710 92311 1100046 901811 8192 256 57514 79333 359645 453044 8192 512 28601 33320 326645 291436 16384 4 7499 4753 428944 157198 16384 8 9200 10442 192194 181447 16384 16 7583 17127 454569 650187 16384 32 14781 28977 888459 683607 16384 64 19415 30933 745307 513476 16384 128 30823 41212 589796 456353 16384 256 28802 35158 1080940 315464 16384 512 36293 45402 871258 726499 32768 4 6067 6768 178864 217428 32768 8