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: Mon Aug 31 08:30:25 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 2768 8554 551422 542506 64 8 4146 14019 727850 735831 64 16 4237 18774 852702 516414 64 32 2952 51823 1204796 983980 64 64 2064 45848 1163036 1734015 128 4 4553 9102 595328 484625 128 8 2279 14389 621518 747933 128 16 4261 27886 1015251 895074 128 32 5209 15912 482881 456986 128 64 6317 30244 1059322 1391557 128 128 4083 35290 1278855 1852520 256 4 5751 12502 467290 545931 256 8 6381 11034 463657 757326 256 16 6676 18891 985259 473263 256 32 3784 29861 1312954 1027695 256 64 7044 37295 1398455 1254656 256 128 14523 74748 1523457 1561112 256 256 5819 59287 752549 1884399 512 4 7239 5041 428827 533827 512 8 4115 8867 313327 671969 512 16 7125 22420 941546 866338 512 32 12829 18817 474078 710192 512 64 18955 19130 970041 463338 512 128 14191 54473 291073 1273106 512 256 20769 56680 257962 922535 512 512 18071 78478 1518938 1351633 1024 4 2785 3696 620946 176458 1024 8 4865 5348 258782 75233 1024 16 13617 13263 1001903 160249 1024 32 21570 34699 976172 294502 1024 64 22157 42389 972414 588528 1024 128 28650 56180 178423 994250 1024 256 24260 28126 827737 486692 1024 512 18540 48613 344567 1381993 2048 4 5673 3302 113167 100812 2048 8 7414 9452 252342 190667 2048 16 16433 13732 152040 253931 2048 32 16477 16106 1037957 933505 2048 64 26803 17568 1171598 997576 2048 128 14383 65674 714351 1169525 2048 256 31751 58574 1580250 215806 2048 512 22038 76658 739631 701115 4096 4 3191 4009 251952 304987 4096 8 7298 6319 554872 311507 4096 16 9245 13689 370480 290250 4096 32 15792 17474 539233 425604 4096 64 20060 23858 195243 227467 4096 128 36553 40837 355493 589102 4096 256 38714 62056 777376 488844 4096 512 24358 53368 664192 785264 8192 4 4086 4847 397168 209027 8192 8 7071 6869 183004 336550 8192 16 10353 22527 306357 300261 8192 32 11669 20165 344362 646262 8192 64 17871 23402 867433 429460 8192 128 21474 32772 647688 649745 8192 256 20393 31970 463033 719217 8192 512 23073 30439 698073 441472 16384 4 4140 5281 180533 212671 16384 8 6438 8545 276929 226677 16384 16 11666 12866 416197 337022 16384 32 12850 13400 455376 405664 16384 64 15118 35311 485437 514233 16384 128 17719 17297 244048 216093 16384 256 21229 27002 622516 490861 16384 512 28843 27320 871446 585290 32768 4