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 Oct 2 02:08:04 2026 Auto Mode Machine = Linux oleg133-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-oleg133-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 3922 4392 614542 551422 64 8 4000 27302 318124 771797 64 16 12468 48959 863676 852702 64 32 4135 47970 1279447 1143223 64 64 2575 64842 1421755 402569 128 4 2209 3586 589446 501839 128 8 5118 19607 526961 571257 128 16 13656 49808 699227 571257 128 32 12610 42410 1206978 983630 128 64 3684 18561 554157 1142750 128 128 3904 69752 1391557 177021 256 4 2382 4518 516270 452138 256 8 7083 10615 42350 582983 256 16 4467 12444 1117543 770920 256 32 13461 27965 1185399 897923 256 64 9845 94222 564887 1280084 256 128 15359 30220 1175022 1339154 256 256 9634 79255 1506359 1707589 512 4 9832 12877 585176 336870 512 8 17382 22011 819085 721163 512 16 21200 32793 1115109 474602 512 32 28801 57626 1169140 1143004 512 64 34026 75605 1347393 1143004 512 128 29445 95721 914287 699550 512 256 36673 108175 1605228 862164 512 512 26737 71220 1541840 1783912 1024 4 9376 12175 303599 204426 1024 8 17914 22455 892775 888894 1024 16 20427 34382 1006836 951728 1024 32 29805 52287 1284839 250555 1024 64 40865 68654 1053512 781072 1024 128 35630 78672 1004011 1354535 1024 256 44450 114682 1575091 808113 1024 512 45608 81186 277133 1060013 2048 4 5819 7429 183018 153110 2048 8 12423 13108 266389 784697 2048 16 12223 14008 332842 160716 2048 32 14401 22289 608619 170412 2048 64 22450 21447 1098063 548919 2048 128 28471 25049 1120405 583959 2048 256 24371 48683 1608660 888876 2048 512 25098 54434 1665101 873688 4096 4 9159 8940 346264 273413 4096 8 15169 13935 366231 327049 4096 16 16747 15986 535852 425783 4096 32 14359 1583 320676 484611 4096 64 27919 55415 703637 753080 4096 128 41714 52210 1595040 703176 4096 256 43211 60428 1004447 957693 4096 512 52194 60804 1686151 830314 8192 4 9997 9690 408884 352068 8192 8 15107 11479 523817 503035 8192 16 18363 25472 780339 513738 8192 32 25568 30806 839356 802520 8192 64 32401 41265 747913 735096 8192 128 38328 48470 816750 809801 8192 256 40739 46340 1043296 869452 8192 512 31661 39928 359596 412487 16384 4 6131 5787 259097 179783 16384 8 9484 9084 306546 474199 16384 16 11792 24412 586124 710993 16384 32 26805 30699 1523922 781188 16384 64 36253 32112 1075425 558473 16384 128 27043 37241 1003734 646590 16384 256 48670 63071 1022979 705503 16384 512 34702 43020 480385 645782 32768 4 5345 8139 192159 276159 32768 8 11272 13409 680300 540449 32768 16 18849 22409 819035 1287643 32768 32 22858 31847 523326 529120 32768 64