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: Mon Aug 24 08:31:24 2026 Auto Mode Machine = Linux oleg142-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-oleg142-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 3511 14817 388021 429630 64 8 5778 12618 1049372 942521 64 16 3717 9221 877797 653436 64 32 3965 56195 1188789 720041 64 64 3572 31080 211899 1599680 128 4 1895 4357 423798 498114 128 8 2816 10035 883293 376538 128 16 12378 15198 684954 529038 128 32 11018 27658 1346196 1121270 128 64 7565 95311 1183041 983630 128 128 6350 61746 1598754 895074 256 4 5133 7256 611189 364746 256 8 3714 27013 820398 833776 256 16 8408 24866 1084800 566377 256 32 8353 79355 625794 861885 256 64 12031 104573 783292 1361224 256 128 12012 32217 1045710 1369908 256 256 18243 56764 757326 1534342 512 4 11074 13154 183973 332695 512 8 14664 23301 673655 318013 512 16 11385 19604 1190529 158757 512 32 30936 63561 1239310 321970 512 64 13359 64695 1394645 1347393 512 128 26991 137150 1635797 904658 512 256 17339 93769 1282994 1624659 512 512 18853 46558 705062 594738 1024 4 7489 6306 566334 210529 1024 8 10383 11277 317023 343053 1024 16 8981 9806 959596 813316 1024 32 13983 54894 692423 249203 1024 64 24317 45837 1347734 503406 1024 128 32683 59593 1537868 816563 1024 256 41117 93371 1092921 1002839 1024 512 53155 113940 1211964 1450117 2048 4 10527 7481 270576 281353 2048 8 9955 15171 332571 273357 2048 16 21540 27953 704970 673889 2048 32 26545 32415 728590 403950 2048 64 31392 51493 410004 998039 2048 128 35506 68937 1463909 1022513 2048 256 35576 42847 690298 409672 2048 512 34951 59267 1000480 1404546 4096 4 6941 6685 420448 246007 4096 8 9725 10489 339296 543223 4096 16 11255 26496 502338 372941 4096 32 29946 25199 811258 605996 4096 64 25761 34839 744593 1298278 4096 128 33589 45970 823153 759102 4096 256 33673 38557 1567534 872969 4096 512 33653 68314 1153800 970569 8192 4 2263 11432 174298 222035 8192 8 12100 12598 362364 350342 8192 16 18035 20119 677188 456815 8192 32 23535 29283 506177 360195 8192 64 31130 41373 915020 508981 8192 128 24371 46407 762333 642360 8192 256 28241 51781 945954 925569 8192 512 41382 63809 1002214 654311 16384 4 8289 8630 235933 217075 16384 8 14718 17302 675211 485019 16384 16 21125 26283 623035 527816 16384 32 26292 31926 898190 745202 16384 64 39022 36799 1147259 1123035 16384 128 42849 49540 1103239 915102 16384 256 34160 52794 1299713 1410706 16384 512 42366 63424 622229 314147 32768 4 7869 7905 452821 282711 32768 8 14241 15379 314266 346146 32768 16 16545 25183 852536 397399 32768 32 24282 38561 521732 952863 32768 64 33563 52645 402367 437507 32768 128 32272 52658 973965 927589 32768 256 40226 53458 1182791 849244 32768 512 40919 75580 1238916 1014236 65536 4