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: Mon Aug 17 10:24:29 2026 Auto Mode Machine = Linux oleg139-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-oleg139-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 5033 12200 598110 219883 64 8 3946 12731 901377 202469 64 16 5889 30890 1033216 983980 64 32 7972 42135 1385075 1124074 64 64 7863 41311 1679761 969761 128 4 4440 5029 542400 524387 128 8 7630 8520 871818 748976 128 16 3117 48030 1185654 934004 128 32 4122 34744 576780 805138 128 64 5653 55652 1852520 1336145 128 128 10472 90644 83058 2211113 256 4 11136 7328 403843 523315 256 8 7918 16703 410325 703260 256 16 18357 29719 753077 1040643 256 32 20696 40448 1340826 1128110 256 64 14215 35334 94355 742146 256 128 20616 78773 1112909 1549845 256 256 15714 72068 508929 817898 512 4 4752 7215 205622 559560 512 8 14282 15688 678980 176011 512 16 14557 35001 815044 535558 512 32 10181 38055 1340664 577310 512 64 10851 24896 1296159 618371 512 128 40970 100651 1455126 914287 512 256 36885 111697 1190529 600895 512 512 18805 46886 1547395 2187279 1024 4 4664 3510 633307 433537 1024 8 10757 18037 948157 412390 1024 16 9081 31338 606307 477388 1024 32 11074 20655 1175799 1101046 1024 64 15673 37019 1729884 587803 1024 128 40760 78848 714541 1136593 1024 256 30988 36580 1141426 1197769 1024 512 37007 82506 1753902 507211 2048 4 4710 6252 266985 182172 2048 8 8711 9860 922081 214406 2048 16 21850 23443 1248753 510460 2048 32 22778 38200 1388428 742572 2048 64 38690 28957 1523901 1275264 2048 128 16467 39262 730386 1432179 2048 256 27223 48171 1050267 546301 2048 512 41115 46723 1400881 1300361 4096 4 4564 4814 418258 310774 4096 8 13647 11599 744335 456634 4096 16 23989 27386 836418 450953 4096 32 39447 33344 540369 1175270 4096 64 10870 82992 841416 1202919 4096 128 22469 106105 1568106 1256774 4096 256 44571 71725 1611951 1267718 4096 512 40847 29395 941785 721485 8192 4 6556 4422 202002 275991 8192 8 7147 9156 327155 217814 8192 16 9952 18016 844971 533852 8192 32 21957 30059 680568 297340 8192 64 21733 39067 636364 302130 8192 128 45892 61100 1030190 1273629 8192 256 33634 39112 1024507 609433 8192 512 42253 59764 1021188 743849 16384 4 5574 6570 620773 675569 16384 8 10248 14277 463072 463885 16384 16 18379 42742 1220317 313965 16384 32 45065 56219 1213186 1309246 16384 64 60403 46977 1360679 1181420 16384 128 33351 41062 332804 346033 16384 256 33866 43162 576903 462365 16384 512 37937 44745 1917192 1107703 32768 4 6679 6352 827348 267308 32768 8 10862 11999 256368 453687 32768 16 17048 21985 305589 293991 32768 32 24201 28181 654169 319697 32768 64