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 Dec 7 05:32:55 2025 Auto Mode Machine = Linux oleg426-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-oleg426-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 4362 16112 304761 201255 64 8 7575 29655 329852 397208 64 16 5581 46742 581273 471099 64 32 6032 27178 929467 771797 64 64 4669 14200 969761 1392258 128 4 6779 19116 163889 198121 128 8 9058 33237 435134 351630 128 16 8101 44930 843068 592699 128 32 4976 71833 444501 826202 128 64 11408 96234 1196221 332467 128 128 10584 99368 173924 229451 256 4 7908 7549 256765 287958 256 8 11541 28799 102900 434571 256 16 8241 23655 668662 598249 256 32 22957 88273 630572 958864 256 64 28606 111792 1080434 927393 256 128 29774 135371 928195 1321031 256 256 16426 130676 1683493 1415041 512 4 11203 18128 236720 255597 512 8 16186 33954 298186 384660 512 16 28715 46938 619799 607353 512 32 26497 80112 792486 762924 512 64 17601 57599 1218910 1038532 512 128 30209 57930 1391032 1140576 512 256 28337 159453 1071167 1594501 512 512 39919 123668 1599251 1689859 1024 4 15415 17130 307314 185979 1024 8 23518 20500 385551 388340 1024 16 22329 44348 763576 702273 1024 32 38729 51524 764799 767122 1024 64 28206 81141 543542 929283 1024 128 32008 52906 1402756 1207534 1024 256 52067 119123 1418508 1314327 1024 512 46410 78377 380092 1620249 2048 4 10518 10270 209256 145817 2048 8 16349 22186 376820 266736 2048 16 20280 18810 413737 454787 2048 32 27175 39343 867862 453802 2048 64 26384 40659 1076728 981840 2048 128 31121 78389 780845 1158484 2048 256 35088 57333 155361 1308682 2048 512 30912 54956 1598780 1451295 4096 4 9666 11049 218279 89401 4096 8 17808 14178 326794 216671 4096 16 21290 33473 666770 552926 4096 32 29590 36796 430251 318205 4096 64 26032 41475 837274 375986 4096 128 32900 50612 873679 598043 4096 256 27252 42919 773108 1029918 4096 512 31995 57099 1502024 502882 8192 4 8090 9180 245064 244179 8192 8 14905 19844 472846 212513 8192 16 21933 38754 509578 406350 8192 32 33251 39901 845220 717894 8192 64 37628 59489 1017650 858976 8192 128 32370 59873 915922 764470 8192 256 35371 47908 1107028 995882 8192 512 52392 73460 1231319 801565 16384 4 8230 10867 218990 125467 16384 8 14080 19668 341709 318947 16384 16 35286 31772 592313 240362 16384 32 33853 42858 546991 523637 16384 64 61521 55125 811933 1027599 16384 128 39842 65741 589903 567452 16384 256 67529 84705 916078 647943 16384 512 75329 111499 796112 942320 32768 4 11038 13515 233748 169083 32768 8 18765 26329 389052 343742 32768 16 34384 43049 524110 389418 32768 32 38798 59406 815749 698973 32768 64 59797 70905 874050 596637 32768 128 48639 79650 1143696 1034543 32768 256 69305 81183 1240134 1029175 32768 512 71886 90422 816098 1190650 65536 4 11601 11913 189877 186927 65536 8 21127 24496 468070 403720 65536 16