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: Sun Sep 13 07:22:28 2026 Auto Mode Machine = Linux oleg338-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-oleg338-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 3336 10173 577521 528618 64 8 4806 18130 792299 760859 64 16 7441 16334 1163036 913649 64 32 6455 52502 1310683 507625 64 64 8388 63313 1143223 1526887 128 4 4271 12035 535368 341345 128 8 5510 16042 735635 403721 128 16 6410 22763 1102844 955616 128 32 4869 32621 1332828 1085013 128 64 10919 21118 283188 1172704 128 128 3706 89451 1539168 1778862 256 4 6239 17028 460476 558715 256 8 5206 11500 897923 713067 256 16 10685 29147 272605 316382 256 32 15498 51498 1347557 450809 256 64 9499 48356 1243036 608074 256 128 9339 84627 1142514 1312954 256 256 18764 72156 524593 417505 512 4 5005 5397 552932 127237 512 8 9095 20844 153153 751971 512 16 8593 32156 281903 708084 512 32 10491 34128 166564 960496 512 64 11345 71950 772252 1014013 512 128 12321 22738 470546 701378 512 256 30258 59576 1574625 1394645 512 512 12698 68568 1759070 693675 1024 4 6742 8650 211264 241618 1024 8 11948 8942 950885 554417 1024 16 14191 20244 483896 955115 1024 32 27419 28862 212792 800731 1024 64 38545 81725 452301 673635 1024 128 33953 92594 1648862 721139 1024 256 33951 103959 344180 1319577 1024 512 53812 37179 1698417 820463 2048 4 7787 6840 284163 253901 2048 8 13209 13780 239702 297375 2048 16 10253 15890 228956 287031 2048 32 18372 30645 635030 561550 2048 64 15400 38334 1263447 1161617 2048 128 22572 20665 542677 721127 2048 256 29824 61032 424806 545815 2048 512 30047 39165 551740 1277540 4096 4 6627 7412 328808 232198 4096 8 9196 10018 394569 327498 4096 16 12404 21853 375673 270541 4096 32 15021 29143 861586 820166 4096 64 28011 33591 460848 720366 4096 128 36511 35792 1588844 1063386 4096 256 32961 87383 850665 309693 4096 512 29506 51207 1758645 1587670 8192 4 6125 7745 445167 351043 8192 8 9188 12115 275008 493045 8192 16 14851 24566 744719 326375 8192 32 30339 24638 218233 259305 8192 64 17503 26290 367866 210191 8192 128 31472 50627 1025027 1060590 8192 256 41168 53550 584679 682217 8192 512 38665 78629 444758 444298 16384 4 5689 6593 313472 205588 16384 8 11269 10909 297269 304359 16384 16 16622 27436 391103 351927 16384 32 22595 32333 1074584 769097 16384 64 32126 40860 286518 480936 16384 128 25229 34823 681106 473869 16384 256 37280 55015 707370 467524 16384 512 39585 55623 651790 487895 32768 4 7016 6550 401515 304784 32768 8 11310 13045 534464 484375 32768 16 16804 20911 798948 535257 32768 32 26201 31464 485913 569016 32768 64