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: Sat Aug 8 06:18:40 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 1986 6971 659861 361867 64 8 4242 25377 913649 863676 64 16 2725 15325 1083249 1017549 64 32 1346 33651 542506 1083249 64 64 3276 43656 1638743 1734015 128 4 3217 7031 258135 576780 128 8 5312 18940 876086 780556 128 16 5295 20809 711270 735635 128 32 6247 32161 1363288 1133103 128 64 4754 19050 789741 824932 128 128 8837 50855 1074159 1111981 256 4 6276 8997 662883 538809 256 8 8299 13979 847597 268381 256 16 8663 20370 648079 1075025 256 32 12976 32573 408297 861885 256 64 16907 50156 1384034 1019886 256 128 8233 50543 1523457 693718 256 256 15680 118687 505098 879535 512 4 5154 5376 114083 197165 512 8 12883 6830 658170 619262 512 16 7014 7333 182658 259489 512 32 8478 10720 1089647 1086890 512 64 29337 28747 1375881 960496 512 128 15772 42844 1895721 971797 512 256 29814 57155 1861217 1723770 512 512 27325 49597 1467055 1289156 1024 4 7749 10427 459216 283968 1024 8 7914 18136 572448 813316 1024 16 9740 10795 775152 310401 1024 32 24652 24250 1343938 282641 1024 64 28921 48929 1253344 1828574 1024 128 20758 21296 1012771 137321 1024 256 36786 84253 1735476 522705 1024 512 25713 62256 1800216 1724328 2048 4 4552 4243 672359 316681 2048 8 5740 6920 576242 132000 2048 16 5789 10025 478713 550361 2048 32 14668 19909 1419400 916376 2048 64 34029 41601 1381061 250546 2048 128 23859 26142 880494 1375312 2048 256 26374 34501 1658350 646647 2048 512 26976 56462 1034831 1622945 4096 4 4907 5852 165822 243925 4096 8 9858 12031 303071 1207570 4096 16 13695 17411 1239367 255600 4096 32 37768 32827 377440 613351 4096 64 40898 54751 1549158 967400 4096 128 37249 45720 1017173 680854 4096 256 29230 60561 576161 1230754 4096 512 48717 48126 1743652 626503 8192 4 5878 5420 226167 196252 8192 8 12041 2546 588847 688754 8192 16 21053 27683 475693 418343 8192 32 18553 33617 730253 852624 8192 64 33042 44933 883310 556110 8192 128 38300 50246 1072240 790427 8192 256 43131 57267 1257041 1061573 8192 512 40985 69315 686044 785279 16384 4 7820 8783 335312 327416 16384 8 11074 11154 382631 293310 16384 16 18231 13358 365046 298461 16384 32 20567 30951 608369 582438 16384 64 28318 35884 712282 900178 16384 128 29239 38251 949638 1042233 16384 256 33949 43844 1327481 720490 16384 512 40121 40156 1342969 988473 32768 4 5194 5658 252294 312454 32768 8 8392 9542 209123 303317 32768 16 11236 16821 663870 461403 32768 32 22940 21895 592882 554713 32768 64 24764 35199 698156 512889 32768 128 37969 35048 1037911 804141 32768 256 25311 32530