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 May 12 15:57:35 2026 Auto Mode Machine = Linux oleg357-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-oleg357-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 3087 7206 492717 532815 64 8 3359 17577 743988 566551 64 16 7141 8486 809014 852702 64 32 3928 45974 598110 752329 64 64 2025 55648 1210227 1226821 128 4 1999 11307 473930 334331 128 8 3159 4574 805138 653282 128 16 6876 25921 800337 841746 128 32 6220 37883 1254941 1057236 128 64 12198 72807 249034 1155043 128 128 15562 76785 752124 1827299 256 4 2994 14178 204140 135868 256 8 4053 19463 850282 733527 256 16 4926 12128 785584 873809 256 32 9908 64563 1267990 1099237 256 64 6064 78313 1332507 1201314 256 128 10957 36598 1463250 1610276 256 256 12729 26189 1588832 2034350 512 4 13272 5829 240943 406966 512 8 6399 25901 779258 311057 512 16 21758 53996 844865 488530 512 32 30326 92433 1171052 1113374 512 64 13608 45369 595397 1038532 512 128 9449 19688 618371 939486 512 256 11966 45976 1575781 1695195 512 512 14892 57585 1471074 542320 1024 4 5219 4471 421041 523533 1024 8 19476 9511 800582 750238 1024 16 25622 23627 760735 785788 1024 32 9333 22886 839220 522705 1024 64 6451 27016 863343 1103592 1024 128 11376 69174 1653942 962391 1024 256 15424 27223 1121751 1012771 1024 512 26263 34720 363893 1684429 2048 4 10903 9514 368875 112242 2048 8 10233 4559 348945 852277 2048 16 11292 10794 317806 912676 2048 32 28670 30533 532649 291028 2048 64 13369 14781 393531 192699 2048 128 11060 36254 846648 1008349 2048 256 20346 21031 375765 1281543 2048 512 25315 19724 752393 1816896 4096 4 4465 3745 284191 356267 4096 8 8180 7392 134927 276511 4096 16 15406 17282 738798 452795 4096 32 14640 16786 528451 579094 4096 64 24273 28584 653803 512635 4096 128 26160 32953 858358 330752 4096 256 35885 36006 749368 413655 4096 512 23006 43955 1754873 306773 8192 4 3585 4935 110684 121745 8192 8 8094 8047 288146 150044 8192 16 9092 17814 268670 195493 8192 32 21611 18062 288379 426067 8192 64 19097 26385 511802 530604 8192 128 27410 42944 1136204 554933 8192 256 30421 38385 247290 411988 8192 512 29868 46599 1084457 551460 16384 4 4894 4355 176845 153241 16384 8 8395 10948 326368 386890 16384 16 14386 12437 281246 312772 16384 32 16213 23026 759014 388779 16384 64 21233 27086 506445 567902 16384 128 23908 45232 864137 603465 16384 256 28502 49726 572944 547300 16384 512 37484 56742 934783 776931 32768 4