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: Fri Aug 21 22:58:07 2026 Auto Mode Machine = Linux oleg113-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-oleg113-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 3310 5650 542506 371894 64 8 3799 15365 863676 688639 64 16 4922 24625 877797 829001 64 32 5882 45139 1255511 1083249 64 64 5795 71037 688639 1722886 128 4 5410 5528 540217 579270 128 8 6050 19059 859260 621518 128 16 8674 16989 1240443 314547 128 32 8902 52353 1206978 1076312 128 64 10307 31312 1455701 1526043 128 128 7478 92090 1346196 172471 256 4 4514 6527 541253 65725 256 8 6584 11330 744204 336827 256 16 11467 25419 1195962 985259 256 32 13674 46529 656399 1058076 256 64 12686 84104 654798 1312954 256 128 15655 58877 1600674 1558845 256 256 17091 108067 1778290 2030503 512 4 7189 15179 670291 549959 512 8 13909 19708 622133 633512 512 16 16345 36000 1143004 781526 512 32 18902 58387 1289156 1073309 512 64 11517 49388 726285 1834193 512 128 21421 63319 1492545 1045103 512 256 14583 79725 1312798 1514652 512 512 24048 67421 1821745 1276891 1024 4 5316 5033 162075 209840 1024 8 12336 10993 910181 316836 1024 16 10696 17367 466752 327764 1024 32 28392 37928 697483 233729 1024 64 28657 21919 1460472 982648 1024 128 24697 31220 1374474 327140 1024 256 25505 88452 1665486 1268896 1024 512 14026 24568 1652033 1073257 2048 4 4972 9300 408309 192552 2048 8 12744 16853 923370 835937 2048 16 23658 18374 1099890 399981 2048 32 35074 50114 649974 648894 2048 64 17723 48506 1219848 456042 2048 128 18990 25963 846982 575277 2048 256 46413 63695 667085 394525 2048 512 46179 36602 1240458 228189 4096 4 5846 9600 455013 412523 4096 8 9998 11396 510457 216707 4096 16 21663 32503 463496 413954 4096 32 23270 35763 1415868 1010354 4096 64 32304 34341 863405 345075 4096 128 25662 63042 540369 522918 4096 256 56199 68028 1691796 983009 4096 512 57218 39840 1009108 915097 8192 4 6260 6733 258600 379034 8192 8 11780 10375 423312 339533 8192 16 17325 31188 647590 683628 8192 32 16723 26287 931769 1239358 8192 64 28829 51337 452794 545992 8192 128 3935 48495 1153948 985315 8192 256 32387 48093 934302 789737 8192 512 46209 63361 675457 663266 16384 4 8210 8535 431032 700020 16384 8 14711 10205 461573 211177 16384 16 16306 18432 726307 542281 16384 32 27523 27867 991168 836473 16384 64 30241 33864 791500 406701 16384 128 33206 37718 661337 893158 16384 256 40120 55716 1079106 809246 16384 512 42170 54025 1108239 854806 32768 4 8221 7557 381803 251276 32768 8 11878 14680 341721 698781 32768 16 20541 23580 821027 1104745 32768 32 27003 26364 799259 875983 32768 64 26581 28708 992906 877678 32768 128 28139 41831 1149195 746456 32768 256 55302 50264 1108148 963423 32768 512 34068 53512 1146415 894815 65536 4