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 Apr 30 19:58:42 2026 Auto Mode Machine = Linux oleg357-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-oleg357-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 6480 14988 313664 274809 64 8 8176 28658 754443 889431 64 16 7785 42075 1087638 1452528 64 32 6652 78037 1363961 150653 64 64 5196 55077 2006158 3203069 128 4 5813 10472 633995 292922 128 8 12772 30095 847059 535903 128 16 10548 19050 1102844 688467 128 32 7099 21290 688467 1346196 128 64 15395 58797 1406136 1598754 128 128 11204 77338 1162547 1911894 256 4 9321 13558 620012 564887 256 8 9399 25179 214071 478536 256 16 14227 21651 477472 958864 256 32 16430 23649 1354356 991629 256 64 14062 75140 1398455 686620 256 128 21342 115732 850282 1453348 256 256 14971 119626 969251 2135500 512 4 10335 13761 678122 648824 512 8 13861 20782 932550 453936 512 16 19463 43367 953248 649806 512 32 26121 56225 906185 1073309 512 64 29791 86690 1524329 752761 512 128 21628 61948 1701913 954944 512 256 46647 114570 854615 1546280 512 512 36964 119094 1594501 600391 1024 4 10510 13182 625559 619871 1024 8 22587 28816 913277 1029029 1024 16 28062 47271 1312720 876022 1024 32 44155 69278 1268896 1597351 1024 64 42850 91724 1238168 1200447 1024 128 33324 59252 1539522 1575091 1024 256 44088 122531 1592612 1180972 1024 512 33287 114670 1061322 1004011 2048 4 13217 15915 532220 442510 2048 8 21425 23226 806278 592948 2048 16 35579 49744 1189279 1227869 2048 32 48902 65592 1405695 1287111 2048 64 49972 86735 1841829 1592555 2048 128 59779 109989 1241893 853632 2048 256 56491 114940 1055170 1452276 2048 512 51153 133490 1771556 1654199 4096 4 14701 16746 664809 552926 4096 8 27164 24896 935375 520053 4096 16 35323 39580 1900679 1049485 4096 32 45322 67138 1517548 884065 4096 64 60519 88551 1504787 1403721 4096 128 68976 101228 1654327 1503207 4096 256 68744 120922 1789419 1212171 4096 512 72069 115869 2033648 897036 8192 4 14865 15558 428095 410070 8192 8