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: Tue Oct 14 10:33:03 2025 Auto Mode Machine = Linux oleg318-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-oleg318-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 9334 20277 647135 610350 64 8 12456 32852 627470 710511 64 16 15667 48264 1033216 1013707 64 32 17259 66464 1255511 789967 64 64 14395 95944 1087638 1638743 128 4 11442 21862 551312 509943 128 8 20745 47024 1455701 800337 128 16 25113 66388 1622919 785122 128 32 27615 91106 1303699 1162547 128 64 38461 115213 1373754 1349580 128 128 21105 114991 2464907 2166499 256 4 17332 28228 757326 527947 256 8 26386 41503 1112909 914752 256 16 26998 67993 917096 1093639 256 32 45037 100709 1506359 1153561 256 64 49270 120810 1248819 1248819 256 128 53668 138819 1272498 1729594 256 256 51427 134304 2152625 2187712 512 4 18221 22171 732478 557237 512 8 32507 41370 777002 736750 512 16 47010 67119 1047141 1011625 512 32 50843 82050 1230786 1130370 512 64 57865 132676 1323315 1624659 512 128 42741 162125 1897396 2063289 512 256 75504 167317 1524329 2063289 512 512 42970 159844 1657257 3029721 1024 4 20562 21972 856970 504648 1024 8 29745 37759 985580 765890 1024 16 47039 63397 1349004 939446 1024 32 54360 81367 1448162 1227903 1024 64 65222 108659 1302766 1265904 1024 128 74837 126282 1450607 1304348 1024 256 76514 145209 1849042 1532928 1024 512 85949 144880 1607514 1592612 2048 4 19834 25240 801837 797224 2048 8 35264 45621 1029745 996650 2048 16 51074 71550 1275075 1307885 2048 32 74568 104091 1750259 1405695 2048 64 87368 116781 1848169 1298003 2048 128 76275 135942 1743156 1486197 2048 256 91363 155657 1684365 1634681 2048 512 87859 140659 1952344 2074960 4096 4 22013 24886 711593 683808 4096 8 35834 36189 995138 955881 4096 16 52953 62453 1168952 1085903 4096 32 77451 99895 1309859 1434667 4096 64 95021 124654 1574718 1639018 4096 128 97610 150361 1642308 1612708 4096 256 100252 136383 1740825 1500319 4096 512 91332 159223 1881528 1532438 8192 4 20494 22067 661186 586355 8192 8 31016 39192 902213 868793 8192 16 54535 61656 1284629 1012223 8192 32 73299 90216 1342764 1123131 8192 64 80824 130398 1521230 1468063 8192 128 101663 138116 1754855 1406871 8192 256 103179 153537 1992237 1510596 8192 512 91205 160507 2015256 1668450 16384 4 21324 22977 796223 660987 16384 8 34477 39627 1000971 920866 16384 16 51405 64377 1430409 1217161 16384 32 69557 88212 1304449 1138346 16384 64 82648 112682 1570235 1286717 16384 128 90130 125290 1664038 1510590 16384 256 92752 132888 1988134 1466271 16384 512 96149 136971 1815199 1452603 32768 4 20253 23416 684518 603552 32768 8 33254 36954 963795 856617 32768 16 49430 60552 1168988 968147 32768 32 73754 86193 1338506 1163181 32768 64 80272 109202 1689335 1342127 32768 128 89662 126505 1666900 1486408 32768 256 94529 128634 1782911 1393143 32768 512 98389 139175 1726277 1572135 65536 4 20541 21424 795472 658838 65536 8 36228 39849 1038753 949289 65536 16 50208 59391 1265343 1078960 65536 32 70608 90049 1500533 1359611 65536 64 85543 114537 1691339 1316251 65536 128 98814 145802 2074584 1683735 65536 256