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: Thu Sep 25 09:50:35 2025 Auto Mode Machine = Linux oleg333-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-oleg333-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 12037 25078 245190 213415 64 8 17461 33757 743988 668072 64 16 19253 52719 1033216 627470 64 32 19542 76459 598110 1105556 64 64 21686 97125 842003 1518251 128 4 13355 18884 447464 200638 128 8 21713 44942 618653 376538 128 16 28206 61505 948860 907174 128 32 27771 88962 1561553 699227 128 64 37329 135034 824932 1032829 128 128 45533 141736 1911894 2673584 256 4 15540 21826 410953 408297 256 8 26482 29681 368881 374281 256 16 38711 59895 1048775 755195 256 32 49023 97410 1588832 1369908 256 64 54422 129948 1619994 1600674 256 128 44474 148413 1662639 1956506 256 256 54055 153659 2285501 2371308 512 4 17806 23647 417245 425260 512 8 33229 36204 608903 579804 512 16 50363 59006 535024 991998 512 32 62068 98876 1707325 1442420 512 64 59039 141005 1053821 990625 512 128 81946 154308 1999881 1185272 512 256 72252 137555 1753325 1299295 512 512 79749 164636 2189509 2460437 1024 4 16182 20175 370357 234482 1024 8 33864 37104 507451 477866 1024 16 48020 56168 1071116 1037480 1024 32 69621 78341 1482144 1399100 1024 64 73790 95898 1841906 1599731 1024 128 74091 142143 1352828 1540074 1024 256 106954 154263 1886400 2052253 1024 512 92822 162670 1448650 1914144 2048 4 19578 20649 411833 296257 2048 8 37805 36721 722887 628019 2048 16 51982 73852 614277 664300 2048 32 70445 73350 1184523 780207 2048 64 71991 130221 1521471 1520394 2048 128 108045 151894 1785550 1076728 2048 256 81912 153488 1629410 2050198 2048 512 103303 175373 2314219 2258247 4096 4 20482 24228 291491 303924 4096 8 33932 35931 389877 417952 4096 16 53196 59635 884110 815804 4096 32 78823 92742 1191738 1422668 4096 64 81839 138350 1789419 1368935 4096 128 103296 145258 2003996 1690465 4096 256 79329 111513 1488361 1628607 4096 512 118921 114110 2407895 2266531 8192 4 21302 22528 385450 328402 8192 8 32692 37782 761843 697775 8192 16 55475 57054 808924 829648 8192 32 66921 80529 945512 836088 8192 64 87491 119267 1367127 1420539 8192 128 89038 143916 1377983 1574487 8192 256 99984 169001 2239469 1481610 8192 512 117404 168321 2329978 1970077 16384 4 20287 22820 419897 272114 16384 8 34210 42225 752803 690607 16384 16 57115 58235 789472 975120 16384 32 71641 79895 1233747 1372199 16384 64 92374 115387 1839888 1193651 16384 128 94426 135328 1480582 1447737 16384 256 105971 157942 2089512 1907559 16384 512 113709 151785 1630904 1968993 32768 4 20359 21757 436587 289879 32768 8 34426 40682 628557 614818 32768 16 52766 65531 1183219 1022308 32768 32 73382 87286 974745 882785 32768 64 82471 109453 1919061 1010671 32768 128 112563 137510 1972662 1824593 32768 256 109587 169427 2308082 1988215 32768 512 122506 151161 1657952 1264192 65536 4 20991 22896 356113 406894 65536 8 33223 36645 662059 508784 65536 16 54347 61245 847802 772164 65536 32 70755 89566 1263685 1205838 65536 64 95970 115388 1030262 1139858 65536 128 95067 128976 1716905 1531107 65536 256 109447 150840 1980362 1441968 65536 512