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 14 22:20:09 2026 Auto Mode Machine = Linux oleg655-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-oleg655-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 3494 5543 571375 546928 64 8 5007 12576 831569 640954 64 16 4836 7928 39681 1017549 64 32 3420 16815 1210227 1124074 64 64 5021 47588 666414 1599680 128 4 2194 7454 533241 473930 128 8 6711 16050 927549 579270 128 16 8634 24489 795593 392505 128 32 5137 28867 1406136 836500 128 64 2849 21087 1455701 1455701 128 128 3446 88158 1185654 2066432 256 4 8866 12177 58289 527687 256 8 9230 19097 691930 739590 256 16 12977 26820 970126 999940 256 32 14965 54180 635047 1132871 256 64 16135 59356 1325925 1163562 256 128 7563 25545 1600674 1610276 256 256 10429 78284 1600674 2187712 512 4 4384 10477 109942 545211 512 8 11753 11849 1064794 882718 512 16 8654 13020 943200 946526 512 32 11038 23890 1391032 1115109 512 64 28156 66935 1541840 464641 512 128 12676 35235 646480 1387437 512 256 30313 57327 1705969 1766304 512 512 13309 61850 1753325 2097550 1024 4 4577 8336 338725 270331 1024 8 7491 9145 563584 431880 1024 16 16433 27828 996094 330412 1024 32 16915 36066 1296083 1080004 1024 64 29247 33820 446982 1225101 1024 128 37190 34171 1030263 492553 1024 256 25529 64374 1602715 1530742 1024 512 22088 80478 364945 186382 2048 4 5379 6153 250057 283535 2048 8 9447 11497 365050 435555 2048 16 12542 28675 316285 349130 2048 32 25978 20790 580958 640571 2048 64 20593 30219 522985 550220 2048 128 24768 63039 356224 1341170 2048 256 40274 69938 968337 942932 2048 512 62741 48724 1091089 753515 4096 4 6910 9598 345332 191338 4096 8 11608 14449 365678 214585 4096 16 16888 34352 677124 393349 4096 32 25280 15369 470104 706095 4096 64 24590 28946 826121 444926 4096 128 33834 62751 840716 407968 4096 256 55007 62520 888500 488497 4096 512 37990 36841 736296 823982 8192 4 6909 6795 360736 429304 8192 8 11122 11622 402693 354601 8192 16 24527 22597 881045 724494 8192 32 25401 27143 652757 490714 8192 64 26881 36220 574032 386156 8192 128 3531 43200 761978 486952 8192 256 33829 52758 805115 694601 8192 512 39347 51811 1193303 491542 16384 4 6929 6104 302349 204225 16384 8 11869 9907 517661 185272 16384 16 14924 20136 480906 338434 16384 32 21998 25261 973159 760282 16384 64 37724 38379 1030820 527289 16384 128 28459 36364 844232 768263 16384 256 37275 58251 967978 283916 16384 512 31326 47434 873773 1047508 32768 4 5261 8222 292974 204114 32768 8 13668 12305 429839 413064 32768 16 14824 14681 391961 303205 32768 32 23766 24310 830538 600918 32768 64 21697 23181 343022 468811 32768 128 28657 31655 687652 615973 32768 256 27864 45160 595229 924053 32768 512 33315 44791 1213633 925809 65536 4