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: Wed May 20 16:57:46 2026 Auto Mode Machine = Linux oleg212-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-oleg212-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 4154 12362 450541 477808 64 8 6029 17284 866463 1143223 64 16 9847 32534 1119387 1101022 64 32 7472 58934 1255511 1029254 64 64 13843 59312 1163036 1690338 128 4 8360 15013 382167 268327 128 8 7567 11493 408949 670413 128 16 5735 34463 1172704 766076 128 32 23694 69979 1391557 1040839 128 64 12752 91948 190731 1162547 128 128 20836 75831 1504659 1705404 256 4 10374 15675 1045710 435452 256 8 13467 9680 738065 725106 256 16 9247 51612 1158540 844929 256 32 24219 58987 1260547 540164 256 64 18961 115570 820398 1173737 256 128 15841 81972 2350543 1185399 256 256 29020 142070 1619994 663292 512 4 11118 11031 802555 550523 512 8 14304 21826 1273106 803757 512 16 18285 32072 930933 497585 512 32 21087 49665 975328 850554 512 64 32021 50004 759685 1028091 512 128 60966 85036 1355045 2189509 512 256 32138 151435 184162 257528 512 512 24964 106958 1496706 1518938 1024 4 11507 17714 332252 380092 1024 8 20566 23362 617642 899883 1024 16 43259 58308 448148 1121458 1024 32 33686 73158 254218 647729 1024 64 35067 63062 1471481 1280243 1024 128 42354 70682 1131503 1528019 1024 256 59722 170918 1932227 1950656 1024 512 52391 121512 1690395 1622698 2048 4 9318 12905 354256 396895 2048 8 23287 25817 336730 668851 2048 16 29385 34863 1639674 1066700 2048 32 32214 38093 1389326 722158 2048 64 48400 67383 1455722 645044 2048 128 77944 102589 1948800 545849 2048 256 73871 92244 474403 265417 2048 512 62806 143921 1791882 1548069 4096 4 13763 16294 601729 510351 4096 8 24023 24916 428043 716729 4096 16 27139 26324 1441650 1399376 4096 32 54811 38716 779174 1267344 4096 64 38575 59801 1299850 848564 4096 128 87398 105330 1884210 695884 4096 256 69771 129768 1311559 1791658 4096 512 91096 123421 1725439 1640896 8192 4 15322 14838 517560 393826 8192 8 23185 31700 853068 539231 8192 16 37553 47947 715279 534060 8192 32 57948 60726 640600 1185521 8192 64 42978 75659 1470702 1242136 8192 128 54982 83513 1552645 548030 8192 256 58176 94320 1133842 680973 8192 512 67022 106822 1509733 1123131 16384 4 12896 13313 383620 416355 16384 8 21608 21338 660409 768048 16384 16 32156 38458 995086 1011863 16384 32 7357 55198 927315 1287537 16384 64 66299 76930 1409751 784560 16384 128 68255 94359 1818225 1216601 16384 256 73822 84154 2098893 1197061 16384 512 77463 109518 1787298 1052078 32768 4 12707 14174 478078 568710 32768 8 19741 22132 499413 514152 32768 16 30300 33865 504324 676436 32768 32 35301 52860 953471 845035 32768 64 44991 65277 964187 611571 32768 128 57968 59819 1070923 1264145 32768 256 58403 90561 991738 1552161 32768 512 66559 83313 988507 781587 65536 4 10147 12800 558157 478221 65536 8 18626 17915 466116 355255 65536 16 26407 31183 1180955 699437 65536 32 38747 55525 701932 790561 65536 64 47930 69105 1149776 1063308 65536 128 71587 87637 1267894 1311479 65536 256