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: Mon Aug 17 02:53:12 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 2296 7077 184897 9720 64 8 1758 15293 666414 842003 64 16 4975 25881 926260 877797 64 32 1788 55269 1330167 1101022 64 64 2918 103053 1310683 1780008 128 4 3042 7704 624409 306992 128 8 3339 19671 895074 864797 128 16 9169 23391 1048974 992724 128 32 7543 53177 707520 983630 128 64 9163 62537 1206978 490380 128 128 9889 65076 1229084 2004703 256 4 5189 14237 677095 554101 256 8 7010 23334 755195 1117543 256 16 7027 22505 1098113 187428 256 32 14858 80274 868157 1369908 256 64 7039 81320 1398455 306975 256 128 18284 28259 1471270 1340826 256 256 15700 56878 1649865 2205688 512 4 6841 9732 264866 677267 512 8 8372 12366 1073309 644927 512 16 18156 27449 1108203 743123 512 32 14072 32493 1320061 1216149 512 64 17512 52788 1414860 671969 512 128 20377 36487 1523247 1346548 512 256 12019 46263 1410215 1161551 512 512 18830 88491 2256220 2116152 1024 4 10014 8296 445776 421248 1024 8 11282 15053 105101 242546 1024 16 12868 22907 817963 916786 1024 32 27493 45517 1130312 550297 1024 64 22423 26769 713117 677246 1024 128 21014 74396 1162433 1468964 1024 256 34046 91159 1701108 1374474 1024 512 38995 90780 1622698 1009913 2048 4 8920 6383 284927 274274 2048 8 10960 11266 604848 495159 2048 16 12574 16188 428258 555163 2048 32 25378 23260 1790015 517971 2048 64 31019 35438 823515 308194 2048 128 21877 74714 2013672 1328928 2048 256 38513 61646 836263 1509175 2048 512 59347 78903 1061166 798409 4096 4 5596 7368 337649 289044 4096 8 10310 13161 219025 400707 4096 16 28059 19659 486519 415757 4096 32 40424 34068 1576596 857972 4096 64 28537 27598 658742 347553 4096 128 26093 45570 1449924 487098 4096 256 55335 86499 1013095 572799 4096 512 19979 47411 367556 360340 8192 4 6376 4677 216879 296650 8192 8 12378 13554 448825 348194 8192 16 22476 24892 844617 689320 8192 32 25836 34079 492275 424987 8192 64 24628 51091 1406871 997211 8192 128 43918 4004 1254105 1342292 8192 256 35146 57586 910413 1050794 8192 512 43602 61154 1286650 633174 16384 4 6098 7021 395979 213075 16384 8 9499 13787 474953 361350 16384 16 16718 21445 691685 633249 16384 32 30244 39328 915566 851776 16384 64 35593 43957 781268 737754 16384 128 34499 50462 1374147 832480 16384 256 39910 53036 1041901 684008 16384 512 39312 49443 1006011 995446 32768 4 7482 9430 295584 389182 32768 8 15223 18380 858045 468958 32768 16 24255 26021 471115 845628 32768 32 34380 42748 879205 821935 32768 64 37607 43542 1118246 918925 32768 128 40653 42700 1123768 774474 32768 256 44057 64233 864728 854625 32768 512 41650 65744 899623 940829 65536 4 7734 8465