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 15 00:09:11 2026 Auto Mode Machine = Linux oleg632-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-oleg632-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 4376 13090 688639 576282 64 8 3961 28070 533875 236131 64 16 3821 48596 1163036 746056 64 32 7822 33937 145429 916769 64 64 7616 72475 1638743 1679761 128 4 8592 13614 646983 258135 128 8 10299 23660 824932 695603 128 16 6442 19547 1102844 914904 128 32 15970 21163 1024942 1000121 128 64 8379 103827 785122 1093856 128 128 15298 97262 1487977 1878447 256 4 5857 4135 292588 377041 256 8 11326 24854 876662 773140 256 16 8392 37377 1108314 1023775 256 32 18686 62932 1286217 1112909 256 64 23577 110674 1224606 1280084 256 128 15328 41263 1632308 1185399 256 256 9961 88063 1391207 2170027 512 4 6911 5936 667582 338409 512 8 11459 16008 694572 780390 512 16 20786 17302 796306 525082 512 32 10340 87179 1195832 1075459 512 64 17823 26380 970041 804962 512 128 10897 90730 1510391 1320061 512 256 15003 24319 425597 145249 512 512 20201 87492 114692 1174254 1024 4 8765 16201 708178 410930 1024 8 24811 30050 891107 875308 1024 16 22397 14820 1129123 982648 1024 32 25816 40530 1247519 318315 1024 64 31047 82045 1003073 1651398 1024 128 47908 55871 1101328 644811 1024 256 45710 80687 965854 904621 1024 512 48710 90563 720534 1048113 2048 4 6484 7789 163341 149817 2048 8 11485 13798 536374 401721 2048 16 9778 23053 567149 682672 2048 32 21063 32965 1379952 516756 2048 64 26493 27819 795304 348422 2048 128 23492 28135 724228 1155057 2048 256 32976 81047 1198405 1201926 2048 512 17598 127967 1044901 979043 4096 4 11568 11952 174750 184272 4096 8 10443 9753 519204 167834 4096 16 12422 13486 578450 444351 4096 32 21771 28626 891821 473029 4096 64 14496 19426 1566390 428459 4096 128 16627 49611 536136 1037255 4096 256 29807 80854 1010354 796256 4096 512 26089 62859 1826129 486932 8192 4 2582 10323 223751 173503 8192 8 14866 18987 333008 284277 8192 16 21372 26468 643925 617705 8192 32 23560 23547 700107 715592 8192 64 28605 52002 424211 382911 8192 128 20410 45900 718164 715145 8192 256 56640 56973 824314 537990 8192 512 29567 90386 818950 877737 16384 4 9967 9480 428519 341638 16384 8 14814 19584 788521 744790 16384 16 25359 17177 544645 521353 16384 32 25584 34682 1124579 656648 16384 64 31979 41776 481924 613677 16384 128 47173 58911 1012668 901749 16384 256 51415 115230 1238952 942695 16384 512 65926 63295 839908 866884 32768 4 8933 8055 224395 182008 32768 8 11798 17109 357596 314041 32768 16 19319 18501 362361 407243 32768 32 30041 33258 519954 378978 32768 64 31304 44003 454133 732867 32768 128 36579 39267 476112 453435 32768 256 31968 42823 799352 650685 32768 512 38184 50405 1307114 1031507 65536 4