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: Tue Jul 14 11:56:36 2026 Auto Mode Machine = Linux oleg143-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-oleg143-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 4584 9902 571375 467002 64 8 3112 14665 769584 695778 64 16 6349 23004 1484662 703068 64 32 4721 57656 1279447 335206 64 64 2806 75301 1421755 1828508 128 4 5126 8895 578645 232230 128 8 6182 11238 479432 621518 128 16 5333 5576 731625 895074 128 32 11312 36425 1229084 976473 128 64 10248 79256 735635 1363288 128 128 4829 95958 1440082 836500 256 4 7810 5706 334206 506050 256 8 12944 18030 828628 282578 256 16 13733 9974 1117543 118243 256 32 9679 27228 82928 554101 256 64 8602 13922 1272498 991629 256 128 16783 78000 1312954 714967 256 256 19915 116574 1084800 787890 512 4 5482 8161 284932 412279 512 8 7457 5897 502005 499553 512 16 11182 13814 937845 811349 512 32 16100 47666 358822 926116 512 64 22161 49655 820337 234651 512 128 16700 39372 545211 1185272 512 256 10851 77988 1201856 891884 512 512 32090 72090 1471074 971797 1024 4 3487 7278 147594 90245 1024 8 14758 17075 834653 485098 1024 16 19880 33323 204106 295028 1024 32 31931 46640 856286 627111 1024 64 17781 32751 356050 810706 1024 128 26720 43059 1793451 1029029 1024 256 48043 79190 1049138 1351126 1024 512 43792 43120 766437 1446211 2048 4 2593 7356 316740 262867 2048 8 16615 8045 588319 413478 2048 16 21136 15269 1045919 820840 2048 32 20928 22599 1071624 256165 2048 64 20067 20173 255039 551881 2048 128 15343 21792 678841 415820 2048 256 27213 34442 310961 630000 2048 512 23837 58454 1192747 734069 4096 4 2116 2414 188842 217538 4096 8 4626 11595 591495 341162 4096 16 1496 35848 1543313 709126 4096 32 22924 23335 1010354 514324 4096 64 32615 41022 1200146 560484 4096 128 26727 33180 229546 648619 4096 256 21743 37919 461206 629580 4096 512 42054 49565 1125898 814991 8192 4 5343 5290 179865 255466 8192 8 6880 9657 367319 206295 8192 16 13538 15291 310114 383861 8192 32 23427 24829 428271 609163 8192 64 20961 30970 524786 685182 8192 128 26070 29926 767630 455942 8192 256 23035 39515 703000 294751 8192 512 22050 43480 825225 605822 16384 4 6135 7819 169196 133229 16384 8 8945 9504 298568 184789 16384 16 14171 15135 202044 346134 16384 32 17009 20611 380880 413716 16384 64 24252 34282 847679 624939 16384 128 43972 54137 378486 365657 16384 256 23683 25570 876895 867343 16384 512 21378 47895 916237 663989 32768 4 3555 4561 383098 201123 32768 8