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 14:03:29 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 1433 2198 196252 496362 64 8 2634 20189 752329 571375 64 16 2288 41612 241440 727850 64 32 6549 45330 1033216 818885 64 64 3103 22727 1492919 1357066 128 4 4817 4517 571257 211216 128 8 5690 11515 776042 684954 128 16 9700 49386 1040839 789741 128 32 6696 53025 1254941 1032829 128 64 7752 76512 1306873 947186 128 128 6150 118415 1504659 1885042 256 4 9335 8895 521283 507966 256 8 7582 10299 876662 163460 256 16 4631 19370 1066483 442086 256 32 12958 47146 1224606 326483 256 64 9886 54433 684432 1280084 256 128 12393 130533 1572543 725106 256 256 7727 86052 850282 2247235 512 4 5346 4676 470546 260939 512 8 9845 22253 760762 603767 512 16 11467 14608 443346 751707 512 32 15438 48152 415952 826016 512 64 8110 39060 848872 414267 512 128 22899 24640 785241 794832 512 256 18767 37216 1022219 1225169 512 512 18972 30217 168261 1821745 1024 4 4473 11437 85820 237687 1024 8 8984 8768 753000 287004 1024 16 20174 25890 629778 469507 1024 32 20667 37271 770010 753396 1024 64 25545 23053 560495 1123805 1024 128 29438 94657 677674 1278338 1024 256 16391 68932 568207 478718 1024 512 9985 92660 1027060 513518 2048 4 3808 4341 113929 121883 2048 8 7658 21954 342654 363628 2048 16 28973 43595 461779 469400 2048 32 28531 32215 1060118 382884 2048 64 14424 24818 268688 172579 2048 128 21079 29167 280013 1199074 2048 256 29090 49144 697359 474613 2048 512 30382 44764 669947 561404 4096 4 4916 1008 134440 280892 4096 8 7572 9787 241722 362323 4096 16 9950 11183 447604 445850 4096 32 10283 31086 636814 581977 4096 64 10567 51249 327679 300516 4096 128 16871 29209 438588 291947 4096 256 18950 29144 388282 748551 4096 512 26221 41111 834387 490898 8192 4 4522 5894 352741 113681 8192 8 7358 5619 231217 236196 8192 16 8992 13973 257432 232919 8192 32 13892 27979 832947 683180 8192 64 30669 21395 406211 584013 8192 128 25473 33072 714342 496034 8192 256 21399 32654 514153 915532 8192 512 27994 36496 784974 603058 16384 4 4642 4827 320432 157231 16384 8 13072 8718 410400 472611 16384 16 16757 16125 395157 400851 16384 32 11544 18581 837799 652075 16384 64 12979 21303 1135656 186948 16384 128 26111 43752 653377 499012 16384 256 24309 31539 333035 448473 16384 512 28186 33194 775319 212442 32768 4