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 Sep 29 00:52:40 2026 Auto Mode Machine = Linux oleg107-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-oleg107-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 2175 8184 592827 542506 64 8 2901 5345 809014 735831 64 16 5934 53732 874936 831569 64 32 2337 37554 1049372 1163036 64 64 2978 49693 1638743 1279447 128 4 5513 8681 193063 301985 128 8 8903 20211 934004 795593 128 16 11762 39765 1067750 508012 128 32 8213 38870 715059 1111981 128 64 8280 50133 1114289 1217930 128 128 7439 60439 434078 1827299 256 4 4168 4936 544547 581719 256 8 13867 10699 827989 438296 256 16 9795 42263 1168627 1008392 256 32 10544 44040 1332507 1031644 256 64 14548 77859 1280084 861885 256 128 24978 84969 1153561 1455317 256 256 12919 141211 1649865 2247235 512 4 8492 10082 525596 436054 512 8 10266 21138 1132755 121644 512 16 7502 31343 1038532 1066380 512 32 28507 94904 1319250 1729323 512 64 20780 83401 1506154 855978 512 128 25308 138746 885996 1459080 512 256 44379 50409 1560891 608730 512 512 34343 110320 1137555 1999881 1024 4 8512 7321 246499 101466 1024 8 17462 20950 649394 443063 1024 16 16847 35441 1200447 872995 1024 32 32109 31003 1097669 737231 1024 64 26732 65877 1304348 1076755 1024 128 12422 33177 778806 1190795 1024 256 20135 79521 1444266 1354535 1024 512 19710 53021 879790 253288 2048 4 9814 6797 217176 245948 2048 8 8952 6850 512899 400075 2048 16 14661 25330 432877 883937 2048 32 25968 45972 393387 457865 2048 64 29061 50244 1580250 1096381 2048 128 19256 57929 1323808 1215360 2048 256 19449 54587 452582 489237 2048 512 35475 63003 840682 1224020 4096 4 17119 13378 52448 135172 4096 8 9938 7567 205994 223886 4096 16 14478 10759 340284 281495 4096 32 11956 33182 938390 623434 4096 64 1097 52884 997275 547150 4096 128 17190 45915 1441287 371113 4096 256 14676 44370 1108178 801568 4096 512 34897 77640 727904 527154 8192 4 7966 4242 391422 153084 8192 8 19861 8636 316146 209241 8192 16 16341 15687 298596 545333 8192 32 15916 25867 559406 393601 8192 64 17257 22218 310538 343251 8192 128 22309 32952 358560 392804 8192 256 28124 34942 356981 528279 8192 512 25632 36395 827132 471347 16384 4 6875 5551 251615 285376 16384 8 10413 13832 779744 685379 16384 16 14697 16922 590775 302617 16384 32 24743 29339 456341 505540 16384 64 26148 36199 977269 840854 16384 128 33101 50254 1205862 801254 16384 256 36573 44275 552039 315822 16384 512 30242 39204 913727 888976 32768 4 5135 6214 266940 160977 32768 8 11542 11757 832732 720984 32768 16