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 Sep 8 14:18:17 2026 Auto Mode Machine = Linux oleg427-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-oleg427-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 4626 11929 627470 551422 64 8 12541 30418 551422 746056 64 16 10398 31715 969761 659861 64 32 7797 87188 253048 1210227 64 64 9282 88510 877797 1392258 128 4 11097 18176 558771 518312 128 8 10751 35184 786271 584313 128 16 22302 62808 1133103 1142750 128 32 14800 64097 1487977 1074159 128 64 17565 124396 1387960 1105114 128 128 15165 117636 1254941 3199360 256 4 7360 22150 633922 675816 256 8 22193 31288 688381 810490 256 16 22541 54386 1471270 812944 256 32 20157 71251 1405778 1132871 256 64 21006 80274 773140 1437779 256 128 27086 106271 1321031 1523457 256 256 42687 131685 1740810 2135500 512 4 18214 19504 661414 553502 512 8 20816 35990 920558 748563 512 16 34789 53002 1177473 1155302 512 32 26384 86310 1442420 745186 512 64 33755 73711 1322500 1372364 512 128 46448 65016 1590957 2327124 512 256 49824 161966 1917728 1695195 512 512 60250 169375 1614885 1528669 1024 4 15157 18334 588125 475169 1024 8 27054 34799 911146 829015 1024 16 42664 49858 1192117 476276 1024 32 30596 83879 1270773 1321200 1024 64 64305 98994 1068717 1125277 1024 128 49586 122928 1395010 1872419 1024 256 69603 136094 1646334 1510288 1024 512 83475 140217 1659694 1732676 2048 4 15777 20348 624731 630324 2048 8 27445 31201 911417 893128 2048 16 41534 53167 1287304 652839 2048 32 59576 67630 899393 1011317 2048 64 57184 97393 1537539 1473451 2048 128 75018 127196 1377297 1199074 2048 256 94399 121369 1514764 1708146 2048 512 96005 179428 1536439 1387530 4096 4 18083 20808 597710 551435 4096 8 32333 36947 1077593 863578 4096 16 48592 52892 652016 942250 4096 32 56304 98487 1267718 1139716 4096 64 71891 107450 1269310 1192814 4096 128 69956 119169 1569825 1086178 4096 256 61069 131143 1325627 1419729 4096 512 84049 146233 2000961 1374520 8192 4 17095 18869 625293 601464 8192 8 27603 30756 1104644 854150 8192 16 42454 52337 1054180 914581 8192 32 59361 69977 1438199 1172975 8192 64 56650 72102 1794541 1105995 8192 128 65065 93982 1050794 1288290 8192 256 56993 109075 1128850 1132571 8192 512 62165 106497 1406583 957020