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 3 12:41:37 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 4354 6187 320021 477808 64 8 4420 9670 901377 695778 64 16 5210 9562 863676 913649 64 32 1781 35067 1255511 987600 64 64 7181 14756 1599680 1484662 128 4 2937 5509 551878 371073 128 8 3942 6732 800337 643880 128 16 4417 34539 990891 160604 128 32 10159 44691 1206978 165608 128 64 6384 73737 794416 1196221 128 128 4493 80192 703810 1878447 256 4 5063 2634 232976 462061 256 8 3882 18495 227931 343618 256 16 6466 16827 914752 115620 256 32 9709 16168 1274008 973645 256 64 25366 75717 610842 1266495 256 128 13048 53633 1523457 1540948 256 256 7270 48066 399486 1775350 512 4 3092 3213 268777 159204 512 8 10395 17867 280834 502946 512 16 6213 17140 934580 547575 512 32 13758 24049 612376 434290 512 64 8350 26840 649020 785241 512 128 14495 39661 1454140 338837 512 256 27895 58227 1337324 1422357 512 512 17712 86020 99357 1127995 1024 4 6753 6801 312570 302701 1024 8 8339 8188 312957 446935 1024 16 12916 16633 228215 664875 1024 32 34139 18235 1021928 133368 1024 64 30837 50502 322740 483025 1024 128 41962 74990 878171 188725 1024 256 18541 61794 572753 1302766 1024 512 23311 74640 778665 1711956 2048 4 8180 6154 241882 359941 2048 8 11651 7995 106995 798409 2048 16 14926 13183 575123 982177 2048 32 25967 28761 829159 425248 2048 64 25283 30886 586311 420193 2048 128 28961 34534 850168 1279252 2048 256 26536 43607 449127 379266 2048 512 24109 46381 521271 460541 4096 4 6836 7620 393133 418380 4096 8 9914 1387 528581 578625 4096 16 15061 19343 417749 281025 4096 32 19330 25156 675898 484666 4096 64 19498 31711 477605 644628 4096 128 15996 64974 449619 580091 4096 256 27838 43915 435508 264273 4096 512 32886 47825 573181 904831 8192 4 7481 9864 281047 225271 8192 8 12399 16542 455314 376438 8192 16 17545 18301 461341 285733 8192 32 19545 28932 680797 381712 8192 64 27213 48573 318866 347016 8192 128 26461 37392 1026803 464008 8192 256 27035 56741 904803 460094 8192 512 39772 42034 702871 850934 16384 4 6164 5072 224410 204846 16384 8 9426 9743 220410 296740 16384 16 12706 24915 388863 800816 16384 32 24728 35442 358961 734121 16384 64 22863 34610 1336829 420264 16384 128 35805 37653 898989 1288044 16384 256 34861 52587 1289566 766788 16384 512 31102 58619 1260889 934897 32768 4 6210 7510 358088 206374 32768 8 12063 13340 570980 252806 32768 16 18422 19350 648998 562385 32768 32