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: Wed Dec 3 14:52:50 2025 Auto Mode Machine = Linux oleg229-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-oleg229-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 14492 18924 371894 262450 64 8 20854 39828 752329 467002 64 16 14722 74923 627470 576282 64 32 17817 76722 720041 877797 64 64 14130 64577 1690338 2133730 128 4 15976 24395 387966 206742 128 8 19637 36654 324823 497653 128 16 26230 68158 1294270 516318 128 32 21063 70025 847059 571257 128 64 25544 92823 707520 1142750 128 128 24573 97705 659704 1618028 256 4 11818 19777 288267 235531 256 8 17579 26492 367241 370536 256 16 33359 55291 487664 428843 256 32 19177 71312 817898 1153561 256 64 26952 89891 1230218 948698 256 128 33040 73884 1437779 1384034 256 256 46486 89794 1422540 554101 512 4 12696 17292 395062 311057 512 8 16828 21775 472825 391747 512 16 22125 22504 445646 507462 512 32 31805 61450 767559 670291 512 64 30850 67887 1064794 939486 512 128 17527 83117 1086890 724081 512 256 23721 107536 1261144 176735 512 512 40163 110298 1575781 846197 1024 4 13377 11520 123639 190440 1024 8 15852 24224 205956 289188 1024 16 27915 42802 665390 563288 1024 32 24190 26689 557150 512782 1024 64 26618 69067 1082454 1010864 1024 128 49924 62105 1167489 979064 1024 256 34581 57006 655539 917570 1024 512 48805 119807 1524224 1184882 2048 4 8834 14537 229188 197225 2048 8 24278 27739 366374 302645 2048 16 36959 42331 578376 508316 2048 32 43788 55031 488069 902986 2048 64 26412 51958 666671 765059 2048 128 55285 91698 1401796 1230860 2048 256 66098 98961 561074 1389551 2048 512 75574 120188 1420339 1761024 4096 4 10313 8042 175658 180654 4096 8 12691 16798 185130 149855 4096 16 22409 19681 242925 334558 4096 32 34421 38129 707811 475175 4096 64 33076 51546 1020436 404272 4096 128 34831 48537 408259 249846 4096 256 53079 79258 1124645 1440683 4096 512 66126 63520 1720945 1497051 8192 4 8589 10294 175623 225358 8192 8 18816 21620 215886 244844 8192 16 29060 40096 448362 393186 8192 32 26736 39073 528580 277104 8192 64 41969 56769 410565 537183 8192 128 47482 56564 1213061 988661 8192 256 40611 69014 1100927 1033039 8192 512 46467 53337 1323625 808696 16384 4 7294 9977 178946 177475 16384 8 10568 16381 241997 235720 16384 16 21853 21458 473964 423852 16384 32 26123 27876 907597 502347 16384 64 34647 44756 1366143 902152 16384 128 55614 63529 460367 1067573 16384 256 56240 73535 1143803 964513 16384 512 66629 102890 1451560 1173211 32768 4