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: Tue Jun 9 03:40:36 2026 Auto Mode Machine = Linux oleg209-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-oleg209-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 4627 9726 659861 507625 64 8 4102 28621 818885 115914 64 16 3385 12866 1013707 727850 64 32 5111 12665 1163036 115964 64 64 6467 46677 679917 2133730 128 4 8421 9311 335166 475609 128 8 4791 16362 771581 663782 128 16 7370 33533 1579934 578645 128 32 23180 76928 1102844 215109 128 64 3907 88771 1346196 1175271 128 128 7070 99923 1508887 2132084 256 4 3131 7107 335145 514045 256 8 8762 28796 1016025 284148 256 16 7389 34064 502969 861885 256 32 6680 47266 1027695 1011241 256 64 11603 61245 1471270 1398455 256 128 22783 30231 1649865 1579483 256 256 4991 83437 1662639 1755037 512 4 6819 10470 539595 345932 512 8 3954 22494 866338 875521 512 16 20832 43105 1193175 960926 512 32 15424 39394 1276891 1662389 512 64 11638 21104 1518938 1323315 512 128 24583 106070 1740536 969603 512 256 33135 104486 751707 1506154 512 512 35191 52384 745186 1040545 1024 4 5245 4603 706199 601636 1024 8 6499 12232 876737 1281771 1024 16 15991 19792 508412 706664 1024 32 21494 49275 1331440 1287921 1024 64 39673 59611 1537317 991266 1024 128 43179 63401 1210257 1317553 1024 256 44265 101738 1692394 1281389 1024 512 31554 156045 1679160 1703807 2048 4 6465 7185 286677 618345 2048 8 8121 7495 941692 422342 2048 16 29028 17285 696623 554733 2048 32 35538 90176 1253308 717333 2048 64 26494 58028 1203947 865588 2048 128 32114 30557 1877250 490914 2048 256 34194 41979 1411470 178133 2048 512 21045 36413 1364606 646452 4096 4 3724 3967 90033 170886 4096 8 4609 6739 355405 181224 4096 16 12898 1414 363028 299719 4096 32 14796 16060 718738 724192 4096 64 28616 43070 1290089 370704 4096 128 21073 30827 765188 642506 4096 256 26101 44394 1049485 763454 4096 512 23272 46736 399812 320449 8192 4 4259 6042 241531 229049 8192 8 10749 8917 217046 193894 8192 16 12599 14133 459860 392262 8192 32 14831 16139 554898 584808 8192 64 24270 41504 726378 459810 8192 128 23673 43189 1517066 607086 8192 256 43142 45233 810202 697195 8192 512 34165 44173 1081453 852878 16384 4 3637 3880 290111 176241 16384 8 5821 8722 173510 191142 16384 16 12069 12492 532466 251361 16384 32 20402 28271 388632 490465 16384 64 24277 29521 939717 573892 16384 128 24506 26272 456087 412943 16384 256 34657 39265 862683 714526 16384 512 30865 49502 363693 496772 32768 4 5698 6770 318209 268858 32768 8