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 Nov 25 16:32:17 2025 Auto Mode Machine = Linux oleg202-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-oleg202-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 8671 16498 253048 450541 64 8 9555 28880 429630 351444 64 16 10653 48264 718114 983980 64 32 13389 64515 799377 877797 64 64 13852 100132 1033216 1083249 128 4 9193 18712 257022 310006 128 8 15185 31792 458940 727658 128 16 15620 57506 535368 568836 128 32 22256 69150 976473 1076312 128 64 17241 85573 1266785 1663139 128 128 23482 125237 1243315 1579934 256 4 13707 19019 263636 338633 256 8 15259 31920 409074 412849 256 16 28848 57996 546765 651223 256 32 24912 69697 876662 873809 256 64 30146 98882 1185399 879535 256 128 33661 116523 1347557 1237306 256 256 34925 149717 445202 2000242 512 4 14946 19753 271050 320624 512 8 21155 31552 435347 266278 512 16 33095 49961 627404 595397 512 32 28354 72274 856319 787545 512 64 48697 107182 1778004 1073309 512 128 52691 122455 1523247 1187895 512 256 54788 134210 1585086 1518938 512 512 61112 164585 1740536 2275345 1024 4 17037 19529 328416 319190 1024 8 29567 34840 466094 431489 1024 16 37425 58907 686337 594639 1024 32 51313 90045 904621 904621 1024 64 54219 106222 1068983 1270397 1024 128 62891 128400 1376236 1160862 1024 256 64418 134226 1774189 1528563 1024 512 66205 137193 1852232 1635675 2048 4 17772 19753 328414 286629 2048 8 26988 34229 506547 466089 2048 16 43592 54018 625914 586631 2048 32 54327 80235 1090535 892015 2048 64 69990 106621 1082973 986463 2048 128 70375 126458 1330575 1183870 2048 256 73743 133629 1521741 1761024 2048 512 68602 129587 1625402 1539744 4096 4 17871 19315 270005 303360 4096 8 29466 33429 456331 463458 4096 16 44741 52922 740805 688770 4096 32 61606 73134 956999 763895 4096 64 69362 103497 1214055 1041153 4096 128 73183 124532 1257234 1181087 4096 256 87825 131997 1803697 1264545 4096 512 90210 125949 1909552 1434188 8192 4 18141 20153 324860 275491 8192 8 29100 33972 500551 502976 8192 16 43729 53909 821083 706687 8192 32 60984 72878 1010853 746759 8192 64 74983 102069 1556513 1244430 8192 128 82070 116640 1967820 1269488 8192 256 75879 125804 1429939 1334835 8192 512 95040 114535 1712694 1579336 16384 4 17531 19351 284464 305165 16384 8 29487 34549 616866 554901 16384 16 44887 50111 717466 716867 16384 32 59024 70418 1157969 876995 16384 64 71081 96326 1094454 1105973 16384 128 85074 113187 1539111 1419155 16384 256 81691 127484 1684887 1412156 16384 512 98600 126913 1802439 1448500 32768 4 17128 18284 294535 283327 32768 8 29150 30806 468536 479203 32768 16 44052 50780 791061 685163 32768 32 64954 76533 1054620 928743 32768 64 75052 98532 1271008 1141265 32768 128 81588 112494 1594848 1284466 32768 256 88232 121470 1769323 1505457 32768 512 87443 120234 1728361 1608398 65536 4