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 06:57:38 2026 Auto Mode Machine = Linux oleg333-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-oleg333-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 1120 5635 409946 566551 64 8 4050 17264 852702 769584 64 16 4003 24225 1124074 939223 64 32 4570 24326 167165 1083249 64 64 2254 58869 1204796 1679761 128 4 2242 8725 488594 515822 128 8 2923 5442 656477 308403 128 16 5672 20970 308580 1093856 128 32 4480 31683 955616 1133103 128 64 10665 51489 1440082 1487977 128 128 9074 58554 1622919 1133103 256 4 4734 4487 528987 627256 256 8 6211 21995 947860 868157 256 16 12395 40692 618584 941213 256 32 10656 37410 1267990 1128110 256 64 8305 17986 1053922 1340826 256 128 7824 77667 266980 677095 256 256 13920 40346 1707589 1938842 512 4 5717 4971 237479 513653 512 8 5838 4567 130611 68077 512 16 13208 28993 1001715 765371 512 32 21437 14949 184241 1125040 512 64 12635 19607 1410215 640121 512 128 14279 62930 1407442 1347393 512 256 18946 118574 832743 1565443 512 512 30055 71447 1747618 960496 1024 4 5324 11419 391740 302147 1024 8 17039 15706 962391 128561 1024 16 11176 14881 859886 481671 1024 32 19332 31409 497574 842017 1024 64 21889 64744 894262 937805 1024 128 26867 67537 707245 731455 1024 256 33952 80224 1226500 1063425 1024 512 40458 94413 1291406 776272 2048 4 4392 13107 438445 353221 2048 8 11073 10206 486356 264087 2048 16 12457 19348 410985 1002933 2048 32 30809 17846 914328 1031228 2048 64 35408 42233 1212444 1279062 2048 128 29927 44598 1625402 952130 2048 256 36381 37980 435091 1132668 2048 512 35364 101430 1551424 1176895 4096 4 5984 9093 266756 590803 4096 8 15721 26125 426312 455617 4096 16 20127 21251 872570 792582 4096 32 32525 33953 752255 876175 4096 64 30584 41283 1101640 1443346 4096 128 51372 51546 1687642 676910 4096 256 49166 73679 359427 991062 4096 512 33996 43748 511750 446139 8192 4 8226 5766 144842 93682 8192 8 6787 17058 633513 615801 8192 16 11747 12910 484678 440810 8192 32 2683 32401 564191 916949 8192 64 21854 33071 645801 344435 8192 128 22889 25144 736956 944420 8192 256 39660 48002 1008361 529680 8192 512 26012 50427 996604 502513 16384 4 7001 6029 276243 361495 16384 8 11404 11922 281555 352670 16384 16 13098 13878 372380 329643 16384 32 24144 30399 487428 404185 16384 64 25515 40549 1123641 837411 16384 128 26205 31964 897357 388577 16384 256 35452 37969 998730 860911 16384 512 25247 47534 628632 450395 32768 4 7553 5980 387451 293965 32768 8 11033 12029 364797 523635 32768 16 14790 19772 857531 576719 32768 32 20949 25645 495688 426221 32768 64 33998 35972 1027789 567793 32768 128 35090 37006 1078072 538185 32768 256 39526 37981 722781 494029 32768 512 36956 46830 1372306 831105 65536 4