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 1 20:53:23 2026 Auto Mode Machine = Linux oleg604-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-oleg604-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 2872 12082 743988 659861 64 8 7752 23764 929467 929467 64 16 8304 33509 926260 955947 64 32 6574 32873 1183548 703068 64 64 5135 76005 1188789 1553394 128 4 2234 14911 677178 482881 128 8 3305 17750 770474 695603 128 16 10942 23443 1133103 1032829 128 32 9920 33674 1303699 38613 128 64 14603 71394 1332828 1421023 128 128 20202 105087 859260 1642783 256 4 5649 6381 225159 534517 256 8 9423 23391 903970 283772 256 16 17387 38462 937106 326881 256 32 20133 61039 1391207 1274008 256 64 12107 89360 1049800 1195962 256 128 18970 84044 141676 627623 256 256 16753 152286 1778290 2045979 512 4 7673 12385 189292 522018 512 8 10647 28278 725303 130841 512 16 25263 45390 1227971 205622 512 32 24783 62761 627404 1264113 512 64 17534 90573 896725 761841 512 128 26966 53612 1193838 1014013 512 256 29115 155763 792778 1546280 512 512 22044 120328 1492545 2039772 1024 4 11582 11983 476487 123728 1024 8 20506 23853 465437 668393 1024 16 18982 30705 835140 252529 1024 32 30725 27316 1424624 622566 1024 64 24604 69244 581123 1179674 1024 128 28106 57524 1183902 1154621 1024 256 21466 116493 1668074 895941 1024 512 23952 91961 742584 899883 2048 4 9547 8535 148890 397980 2048 8 18734 14219 576551 514065 2048 16 20277 30891 1227167 435003 2048 32 33101 50113 1480817 681318 2048 64 34248 40359 618345 876004 2048 128 20917 82080 1712573 759109 2048 256 53003 72446 562617 703527 2048 512 43455 89922 1732608 705434 4096 4 8729 11133 539030 411781 4096 8 13750 17233 420974 364994 4096 16 27112 28831 634345 589283 4096 32 23461 38362 942715 863058 4096 64 21875 85990 937724 896849 4096 128 36515 48413 1092255 1101357 4096 256 49428 66591 1715961 1036442 4096 512 40917 59539 571580 1195886 8192 4 9400 7260 394795 272646 8192 8 14948 16058 490098 362816 8192 16 22783 26977 722650 455362 8192 32 3168 47215 930280 761471 8192 64 35991 64691 722590 467633 8192 128 41837 47882 969934 391944 8192 256 49606 91647 1543300 1068472 8192 512 42454 59373 1346711 401076 16384 4 8225 7497 298978 409273 16384 8 11126 15451 291924 306059 16384 16 19566 24185 496500 252964 16384 32 31334 36818 695472 691977 16384 64 34774 43480 1416201 579574 16384 128 40531 47407 1661303 565649 16384 256 41619 60793 1334856 790089 16384 512 48127 69610 1005334 886293 32768 4 10447 9828 311835 379500 32768 8 14275 18276 403258 366442 32768 16 22095 31675 706769 529020 32768 32 36867 42674 682100 748876 32768 64 37163 49922 590457 584578 32768 128 45090 63696 1284262 647296 32768 256 60462 93154 820919 914261 32768 512 52972 79344 739198 1367105 65536 4 9277 9880 426414 282211 65536 8