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: Mon Sep 7 22:49:44 2026 Auto Mode Machine = Linux oleg230-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-oleg230-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 4345 11684 471099 481234 64 8 2304 5432 402569 760859 64 16 3420 26623 942521 561808 64 32 4482 31938 1105556 388021 64 64 2457 49419 1029254 1421755 128 4 5569 7631 501839 466923 128 8 3066 9856 700139 330015 128 16 7591 34252 372102 770474 128 32 11244 15782 800337 267258 128 64 3935 36835 1059322 684081 128 128 7782 74114 739689 1755594 256 4 6557 8739 530031 461267 256 8 9275 4995 622890 372593 256 16 13121 34307 377041 764334 256 32 12275 26950 185485 510138 256 64 12000 45722 250242 921029 256 128 12830 53211 727070 648079 256 256 17504 36617 1142514 1696795 512 4 7872 8784 540545 149840 512 8 7367 5849 385835 648237 512 16 10587 18115 869143 618371 512 32 7667 14911 991998 996139 512 64 14517 31349 690108 103684 512 128 25370 62783 583110 650593 512 256 11067 66099 740050 1350783 512 512 15258 42999 1032044 811349 1024 4 9814 8995 392923 398427 1024 8 7156 8447 482103 354054 1024 16 20271 25269 556501 315950 1024 32 13712 21740 185505 223047 1024 64 24251 29738 751287 1027060 1024 128 42471 60331 759659 650082 1024 256 48708 89626 994020 601215 1024 512 29373 71899 394583 690975 2048 4 6576 6562 341958 691910 2048 8 11832 11745 803187 284163 2048 16 8014 14463 1060642 377782 2048 32 9460 22009 163618 987030 2048 64 18701 17681 1270548 602176 2048 128 40420 51595 877885 487156 2048 256 21228 35758 723192 1306890 2048 512 33875 73033 620982 1032220 4096 4 7375 13474 496372 524931 4096 8 21444 28928 354847 417232 4096 16 1045 15567 316342 568647 4096 32 16029 34042 388247 377547 4096 64 19509 94148 624863 634252 4096 128 19020 31704 1416335 814489 4096 256 23214 41892 416261 380381 4096 512 24799 38538 204311 676564 8192 4 3761 5960 116043 224094 8192 8 7237 11912 307266 264941 8192 16 10148 24094 1136354 387935 8192 32 19034 22894 739224 459737 8192 64 21176 25614 725075 693648 8192 128 29690 35402 660906 909401 8192 256 25548 101482 485198 357616 8192 512 35703 43390 1279796 821653 16384 4 4143 7774 776492 642455 16384 8 12437 13043 765610 450298 16384 16 16618 12021 237672 256072 16384 32 14785 24013 511603 308660 16384 64 36748 68576 510501 380563 16384 128 33715 45083 617421 794878 16384 256 26221 36661 638432 287407 16384 512 46044 49591 576211 292273 32768 4 4156 5298 235218 143868 32768 8