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: Fri Sep 11 06:43:42 2026 Auto Mode Machine = Linux oleg413-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-oleg413-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 3950 9283 532815 474430 64 8 4869 15407 695778 205728 64 16 2916 11598 645579 148486 64 32 1713 8740 1204796 373966 64 64 5815 54462 645579 1279447 128 4 4986 13110 631014 546819 128 8 9316 20225 711270 757430 128 16 4931 37779 1183041 881842 128 32 7137 16938 1332828 776042 128 64 11680 44260 1185654 357483 128 128 11501 79058 1561553 1911894 256 4 7889 12155 297698 309185 256 8 7567 12067 737558 649647 256 16 10422 38489 1076103 770920 256 32 7817 52751 1163562 886067 256 64 9317 56611 1164824 1300235 256 128 14423 68707 1588832 1384034 256 256 22034 86342 1588832 320347 512 4 8270 3931 240269 475442 512 8 8509 23789 692780 500951 512 16 19231 18261 232945 440256 512 32 15927 16916 1201856 1030064 512 64 30809 72347 967855 502475 512 128 19953 65055 1547395 1242896 512 256 11003 73954 1171691 1019791 512 512 32524 123108 1115688 1701913 1024 4 6624 5513 563880 203941 1024 8 13567 12588 237136 439481 1024 16 7722 15844 423157 829175 1024 32 11025 46553 698050 617998 1024 64 24481 44704 928279 719568 1024 128 24152 77178 753000 280006 1024 256 47106 98689 552066 635650 1024 512 19992 40494 216166 604856 2048 4 7367 11098 293574 212560 2048 8 6196 11035 182160 399386 2048 16 12302 19445 634420 189506 2048 32 24210 23763 250305 284248 2048 64 19075 41592 291028 516259 2048 128 18347 32643 1365257 768137 2048 256 28657 32188 601839 304081 2048 512 27035 63559 1510236 1151804 4096 4 5223 5555 227238 191000 4096 8 9971 1245 642002 554783 4096 16 10876 14885 600761 304150 4096 32 15652 23559 326683 261490 4096 64 24967 42147 365188 315807 4096 128 22549 34464 897458 853878 4096 256 20852 37098 1039578 371450 4096 512 24828 34197 403427 168704 8192 4 5348 5525 278573 273953 8192 8 12215 14704 360041 299152 8192 16 25789 17526 342502 301507 8192 32 12400 30035 843581 471186 8192 64 23895 34768 836414 577670 8192 128 23030 39644 733323 442667 8192 256 24135 48469 572187 784364 8192 512 16472 29214 471373 189660 16384 4 4911 5613 491922 386853 16384 8 11099 8940 685468 724982 16384 16 9698 12633 350061 334941 16384 32 12502 31518 551906 609410 16384 64 28443 26767 648769 346187 16384 128 22744 33475 908149 346963 16384 256 28113 41398 545367 767937 16384 512 26682 40156 827518 595500 32768 4 5020 6101 174020 167033 32768 8