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 15:15:04 2026 Auto Mode Machine = Linux oleg110-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-oleg110-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 2767 2676 467002 516414 64 8 3454 10526 809014 752329 64 16 2582 39505 778512 157643 64 32 5444 25858 592827 1033216 64 64 4483 50270 1013707 1210227 128 4 5481 11061 380811 147987 128 8 7258 8486 460514 643880 128 16 8646 36962 529038 870405 128 32 12192 60344 1229084 831319 128 64 4700 21129 1123617 743788 128 128 2592 29419 198487 1663139 256 4 4828 4840 180527 525621 256 8 7066 16161 826078 393340 256 16 6841 16506 1028679 715443 256 32 4070 7937 958864 258807 256 64 16653 48829 1312954 636553 256 128 9663 42132 1430119 1514860 256 256 6488 29948 44183 1985448 512 4 5340 8923 333522 273362 512 8 5759 11237 344324 79874 512 16 8032 24459 704368 596058 512 32 8591 6824 190399 126577 512 64 14876 68057 1248678 1230786 512 128 9957 63070 1480200 1506154 512 256 19929 28422 217779 1418599 512 512 18033 75896 1017858 2039772 1024 4 3551 6293 158463 580808 1024 8 5772 8526 965203 905384 1024 16 8403 12958 402836 875308 1024 32 14944 38589 839384 976172 1024 64 23657 37011 563584 329146 1024 128 27502 33274 1358390 801927 1024 256 14990 46790 1211964 885048 1024 512 32880 66567 1420384 667147 2048 4 8504 5838 409340 169454 2048 8 5527 8196 407553 421844 2048 16 7168 14821 743665 322932 2048 32 28509 31698 707934 248215 2048 64 27564 27066 637623 422093 2048 128 23489 32984 877795 305270 2048 256 31651 59645 707642 260760 2048 512 36884 58633 456527 686107 4096 4 4832 4254 161171 134896 4096 8 4716 11802 266735 217872 4096 16 14704 12930 494032 282876 4096 32 16812 14166 438409 357639 4096 64 23031 29149 326062 450456 4096 128 18268 33836 430111 169458 4096 256 41236 45309 865231 668196 4096 512 25239 64116 329445 708045 8192 4 1647 5324 375866 357200 8192 8 8677 7927 574387 294156 8192 16 16852 14378 399686 489721 8192 32 19660 21509 396284 657680 8192 64 29540 31058 804248 753704 8192 128 21594 23230 317963 347947 8192 256 20741 35695 651866 335505 8192 512 46785 31072 427781 595656 16384 4 5361 5982 328251 356087 16384 8 8556 7218 355092 318662 16384 16 12503 15420 373473 582270 16384 32 20190 26305 321108 675410 16384 64 26134 43462 968783 246098 16384 128 28405 37725 825689 799297 16384 256 38647 47633 1029924 853024 16384 512 63134 45667 408507 1000359 32768 4 6193 5721 756939 170717 32768 8 6189 8689 313718 341578 32768 16