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 Sep 5 11:16:03 2026 Auto Mode Machine = Linux oleg342-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-oleg342-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 3202 7748 385237 582535 64 8 2619 22552 769584 799377 64 16 4577 20692 942521 852702 64 32 3344 32772 1033216 1083249 64 64 4168 64391 78632 1690338 128 4 2919 11095 680612 462100 128 8 7560 22179 913347 790905 128 16 9188 37715 1065630 883293 128 32 9644 44213 1306873 345965 128 64 9135 22447 492629 1185654 128 128 8800 68262 1526043 1526043 256 4 5308 11222 621448 380381 256 8 10928 14450 861885 785010 256 16 12272 27651 365242 748353 256 32 12251 9386 852984 992545 256 64 7776 40314 934659 1354356 256 128 10006 98882 1514860 1579483 256 256 8180 51862 1729594 1487577 512 4 3928 7136 459275 203575 512 8 5449 9656 810124 412200 512 16 16708 26904 1180062 1007827 512 32 12255 32757 1147892 1096322 512 64 22062 53172 957072 525724 512 128 19050 26994 442889 691887 512 256 20809 82156 1038532 1668848 512 512 28338 98238 975328 948197 1024 4 8835 9969 584205 212708 1024 8 10954 13789 474749 209492 1024 16 11136 26837 642016 1021928 1024 32 8928 22501 940475 1050420 1024 64 10957 42748 117096 312593 1024 128 13731 40812 154407 591527 1024 256 27132 55303 1537317 1073257 1024 512 31520 57270 758586 787661 2048 4 6157 5165 469297 304447 2048 8 7722 11553 358424 415076 2048 16 12398 17198 408212 401177 2048 32 18695 23230 308892 301583 2048 64 25213 17225 229084 1269047 2048 128 19227 43983 863066 645238 2048 256 49720 79192 678573 806657 2048 512 29369 56226 588520 651848 4096 4 5704 5353 300711 268448 4096 8 17251 10792 426672 481379 4096 16 21294 19663 531049 384605 4096 32 22912 23017 347265 584631 4096 64 25017 39301 857800 961929 4096 128 27618 62409 986962 803781 4096 256 32266 46872 1714591 946402 4096 512 34588 47896 478337 837968 8192 4 7994 5679 267146 262808 8192 8 12176 14950 340340 263138 8192 16 14025 30128 242662 267266 8192 32 3202 33248 1208071 684555 8192 64 26413 39750 311328 414138 8192 128 22479 49609 697067 584390 8192 256 39583 52582 1174458 485912 8192 512 29967 37864 522217 432797 16384 4 5527 5887 182267 148624 16384 8 9487 11531 335022 504852 16384 16 15759 16845 532689 620840 16384 32 21828 21425 313713 489396 16384 64 27956 27470 882854 818675 16384 128 26056 37018 983493 860738 16384 256 30049 34161 848516 721125 16384 512 32354 47454 602512 658498 32768 4 7388 5890 248289 340432 32768 8 8997 10880 454599 414778 32768 16 14735 18580 765788 488257 32768 32 21027 22585 868093 567479 32768 64 25436 27617 723082 593612 32768 128 28871 38970 836559 870490 32768 256 33164 33519 831568 973820 32768 512