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 Aug 31 17:50:57 2026 Auto Mode Machine = Linux oleg251-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-oleg251-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 1370 2612 608965 532815 64 8 4125 18768 576282 673098 64 16 3397 11379 752329 703068 64 32 2120 17941 156905 877797 64 64 5328 41638 1452528 222250 128 4 3028 2748 358438 362798 128 8 7100 22483 392505 590094 128 16 3609 43240 1048974 615814 128 32 3768 31856 1123617 771581 128 64 6170 15115 395104 453896 128 128 9852 13383 1455701 1598754 256 4 6083 9376 555248 134523 256 8 5135 10162 244043 636930 256 16 4028 9480 102605 706964 256 32 11204 51058 999940 805021 256 64 13069 59231 1099237 392620 256 128 9637 102272 1023775 1114064 256 256 6399 12789 1267990 1430119 512 4 4977 8788 773364 248068 512 8 12755 15619 306397 609594 512 16 11168 18788 855978 452692 512 32 16177 25359 514021 879825 512 64 12826 47058 775879 441069 512 128 19828 58175 500951 316793 512 256 22646 51416 611678 442068 512 512 33701 42616 1040545 997991 1024 4 9341 7063 143439 189491 1024 8 6551 9978 286927 715135 1024 16 17608 31680 348311 529732 1024 32 11663 53396 1038483 329272 1024 64 14506 46292 141889 690086 1024 128 21612 72173 1259223 1123805 1024 256 12319 55673 813316 533549 1024 512 33725 76969 1176766 1043783 2048 4 4309 6440 186402 85418 2048 8 5943 7452 552947 455317 2048 16 18648 9506 365128 792589 2048 32 12266 19434 478846 1016343 2048 64 11959 14832 566999 1149954 2048 128 639 33913 238444 397115 2048 256 17201 19203 364539 183515 2048 512 12139 56569 452988 1381950 4096 4 2820 4843 122017 175937 4096 8 7664 5721 309108 349932 4096 16 10815 12560 520984 597170 4096 32 23433 28628 708161 311084 4096 64 22454 39171 670491 292071 4096 128 23930 41604 682314 1365779 4096 256 30996 39940 615108 640303 4096 512 32319 48575 1470777 847141 8192 4 5764 4414 291384 159197 8192 8 12642 13335 378645 222753 8192 16 13310 13488 519603 402556 8192 32 20196 24957 618583 432596 8192 64 26519 38063 763196 733511 8192 128 26269 42790 508003 620751 8192 256 30826 43008 851124 750101 8192 512 33033 50992 792341 838578 16384 4 5209 6819 128943 173056 16384 8 7382 9916 890912 340828 16384 16 17751 19320 1015556 647974 16384 32 24371 25046 763822 629767 16384 64 28857 37309 563529 551778 16384 128 26679 47490 957125 754953 16384 256 37999 40402 780266 961571 16384 512 38872 56574 463741 437573 32768 4 5996 6249 257357 285936 32768 8