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: Thu Aug 27 14:36:45 2026 Auto Mode Machine = Linux oleg421-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-oleg421-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 1605 5230 170132 52760 64 8 3035 10768 118734 237174 64 16 3368 12939 831569 799377 64 32 3088 27814 1143223 877797 64 64 1933 26801 1421755 1421755 128 4 3569 3420 504196 373136 128 8 5791 16113 739689 656477 128 16 4779 22812 805138 283188 128 32 5592 31434 241094 955616 128 64 4125 23791 1142750 1332828 128 128 3451 54890 1561553 1911894 256 4 2619 5435 221627 480248 256 8 4310 8487 785584 422432 256 16 5304 24504 937106 639967 256 32 12954 43678 361066 1044693 256 64 11945 58771 1256123 1173737 256 128 8316 80964 1158540 121096 256 256 14840 55883 1122215 1829808 512 4 5706 8292 301155 534491 512 8 12310 16175 467575 643189 512 16 6097 8581 622133 802555 512 32 15193 11367 1103647 1150351 512 64 12573 41150 1501940 1140576 512 128 10153 31341 1590957 1312798 512 256 17204 72954 485328 890404 512 512 16322 34538 1734911 2196227 1024 4 6171 8685 187268 534744 1024 8 13362 20903 460843 408274 1024 16 20125 35181 811932 854073 1024 32 15512 27479 1127641 901394 1024 64 18893 46912 1345201 585479 1024 128 14767 30535 1155553 1317957 1024 256 22666 58692 1602715 1597945 1024 512 14224 58175 1648862 1646334 2048 4 3767 7279 186689 155033 2048 8 6772 7358 328677 400000 2048 16 15663 32788 124732 879773 2048 32 22499 18655 284088 521905 2048 64 23781 32920 446977 425164 2048 128 16127 15471 214786 257609 2048 256 38395 56065 1412398 1253308 2048 512 44961 67778 453395 248516 4096 4 6387 4768 609889 143261 4096 8 6601 9987 179114 219473 4096 16 17934 11588 213089 219061 4096 32 21092 36181 927748 532580 4096 64 48702 64243 695631 747607 4096 128 47908 75074 737371 1150555 4096 256 13783 31938 868731 286131 4096 512 38804 52913 887765 846974 8192 4 1765 6181 231614 279887 8192 8 9369 12889 499903 290301 8192 16 16086 19557 585596 436464 8192 32 24217 22705 410153 531779 8192 64 29719 36288 729153 552213 8192 128 25398 28666 543161 353987 8192 256 30950 34705 813021 610071 8192 512 24895 27981 190241 336438 16384 4 5561 6113 187094 242941 16384 8 9261 9529 301642 401685 16384 16 14066 14357 453322 289255 16384 32 16249 21373 443180 708683 16384 64 25613 27226 715650 901998 16384 128 18591 46739 327221 413141 16384 256 26798 33235 430376 488342 16384 512 35026 36322 733431 630275 32768 4 4841 7380 280894 264778 32768 8 9276 12441 579481 379219 32768 16 15559 18267 624938 479260 32768 32