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: Sun Sep 13 12:35:39 2026 Auto Mode Machine = Linux oleg354-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-oleg354-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 9907 15395 673098 666414 64 8 10110 34096 1363961 263222 64 16 9391 49428 1033216 344233 64 32 18374 76112 1363961 1780008 64 64 20888 97690 1679761 1828508 128 4 12645 20446 726674 814915 128 8 15436 37525 881842 667081 128 16 15379 62808 1142750 953918 128 32 21191 86136 1406136 969421 128 64 33683 123424 1504659 1185654 128 128 38588 131014 2464907 1778862 256 4 15464 20588 638445 762164 256 8 22239 34092 847597 639967 256 16 21667 60691 917880 861885 256 32 25061 89108 1231629 1201314 256 64 45878 104279 1405778 1340826 256 128 43814 137187 1471270 1632308 256 256 45928 135662 2114473 2880164 512 4 19142 20863 807687 514637 512 8 28820 38545 944860 878386 512 16 37652 58972 1158418 986529 512 32 49093 91348 1471074 1347393 512 64 64493 129813 2178404 1355045 512 128 67733 143091 1329871 1542947 512 256 54059 160706 1759070 1515722 512 512 65016 170613 2253852 2768068 1024 4 18382 21790 618710 517166 1024 8 31572 36815 906339 932714 1024 16 35758 47734 1009913 1017811 1024 32 51972 92377 1735476 1213334 1024 64 51774 108533 1458489 809484 1024 128 90580 137690 1831694 1430318 1024 256 51537 131164 1715375 1774189 1024 512 87665 150363 1444266 1848247 2048 4 17317 19605 682238 618924 2048 8 30816 34978 1174321 1063926 2048 16 45992 67626 1365257 1129688 2048 32 59668 93682 1316302 1151804 2048 64 79478 113993 1673209 1254223 2048 128 89887 129898 1728424 1358134 2048 256 90156 155991 1492654 1445434 2048 512 103685 161105 1972971 1516904 4096 4 19858 20596 722274 624681 4096 8 30277 36055 923162 920491 4096 16 49406 61157 1293683 1154421 4096 32 61222 74301 1476592 1227501 4096 64 85166 95911 1790911 1303697 4096 128 80958 144739 1790911 1216893 4096 256 69778 143613 1859332 1676607 4096 512 94371 161240 1921297 1557444 8192 4 18212 20454 609206 616541 8192 8 30968 37489 1070003 864878 8192 16 47448 59495 1347186 1249726 8192 32 69131 86822 1285639 1288483 8192 64 78628 118953 1839701 1432682 8192 128 93911 143891 1686631 1429166 8192 256 95102 155850 1867802 1666750 8192 512 113746 163908 2006899 1637440 16384 4 19675 20836 591182 739182 16384 8 31183 32903 1028045 905039 16384 16 46345 56811 1139989 970781 16384 32 68593 79920 1455187 1132736 16384 64 84181 104653 1664360 702295 16384 128 92939 130751 1837625 1389428 16384 256 84932 131467 1333121 1357748 16384 512 96237 120037 1107185 1590220 32768 4 18966 20901 747768 620652 32768 8 31013 35598 1005061 831759 32768 16 51304 56157 1126125 963423 32768 32 69447 91231 1663853 1367105 32768 64 80033 107305 1508646 1401111 32768 128 92968 125408 1714091 1561721 32768 256 100049 142736 1787758 1438070 32768 512 104769 146607 1755582 1691685 65536 4