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 Jun 11 23:55:06 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 2824 5468 508587 474430 64 8 3896 6130 170672 121474 64 16 3497 14925 874936 555990 64 32 5624 28120 1105556 503814 64 64 6613 66595 329852 1780008 128 4 5589 4470 600657 579270 128 8 3177 19150 907174 718889 128 16 7650 10846 1220700 864797 128 32 3532 24916 1142750 727658 128 64 8771 64708 1185654 706589 128 128 11208 92887 1391557 1802755 256 4 3264 6362 584570 253431 256 8 6587 5542 505812 307327 256 16 7221 22994 1052888 911645 256 32 11709 27251 873809 980760 256 64 15452 17900 1280084 1163562 256 128 11660 81530 1368162 1266495 256 256 15341 138372 1534342 2170027 512 4 4753 6039 229903 176127 512 8 6159 14594 251969 198605 512 16 16688 24364 884172 302940 512 32 7485 17684 88185 540681 512 64 8197 30103 191760 1091863 512 128 23071 41538 679195 825699 512 256 33896 100944 1575781 851903 512 512 19585 84670 343883 1759070 1024 4 7117 6512 486913 381239 1024 8 12164 10946 313254 269889 1024 16 13758 24763 880512 851195 1024 32 19571 41195 729344 948157 1024 64 26793 62619 464833 823768 1024 128 34245 41238 1460969 464179 1024 256 15203 93007 1121458 565439 1024 512 24746 38893 446564 1517224 2048 4 4412 4350 344896 178207 2048 8 6090 12990 327100 428002 2048 16 13695 13451 584953 871472 2048 32 11573 29621 506547 722887 2048 64 23504 59235 476746 457963 2048 128 25075 36008 729084 681751 2048 256 39263 73846 687755 489599 2048 512 39241 62835 1701042 751012 4096 4 7416 4726 185306 173294 4096 8 7864 15277 304058 191671 4096 16 23394 21678 556598 646253 4096 32 19345 57562 590885 502455 4096 64 21190 31634 348442 249864 4096 128 22568 33511 711977 418380 4096 256 19475 39520 1367627 281260 4096 512 29703 61882 1266596 905977 8192 4 5639 7874 574723 634062 8192 8 22467 19126 637155 433185 8192 16 13852 13142 497384 269598 8192 32 33727 34154 990913 437442 8192 64 26904 29924 742226 446991 8192 128 37159 41472 1002214 977661 8192 256 43496 33659 584729 566377 8192 512 28324 40043 692711 283618 16384 4 3800 3928 357339 192393 16384 8 8448 9910 472760 329876 16384 16 12899 17268 782167 575324 16384 32 19589 26171 454038 397553 16384 64 26507 21739 526510 283113 16384 128 24877 35069 1025911 625844 16384 256 35267 50481 697130 670513 16384 512 37393 42214 419651 364867 32768 4 6206 7076 315565 333604 32768 8