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 Nov 16 17:53:55 2025 Auto Mode Machine = Linux oleg339-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-oleg339-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 1446 7396 106487 236965 64 8 3583 21917 533875 380864 64 16 5078 19625 557144 571375 64 32 2692 50393 780776 877797 64 64 4360 57656 1421755 1163036 128 4 2415 3638 191070 307696 128 8 5124 19435 402510 332467 128 16 6929 44769 584313 537512 128 32 9817 11207 247086 700139 128 64 10819 75468 1196221 927549 128 128 7711 69680 927549 1487977 256 4 8849 7139 254211 250009 256 8 2604 8314 220128 341868 256 16 8145 14906 675816 205155 256 32 10887 14907 847597 769263 256 64 7279 81897 630572 996229 256 128 13995 76440 1260547 1148625 256 256 10335 99884 1523457 1696795 512 4 4329 10115 200534 154642 512 8 12428 11507 179588 400888 512 16 12129 12151 127843 578554 512 32 11695 16421 807687 118962 512 64 30078 19916 1004057 462042 512 128 12186 31393 174155 935801 512 256 7343 89778 939486 1376763 512 512 12329 34206 1299295 1652157 1024 4 4520 11514 164685 78228 1024 8 12885 10216 431143 393860 1024 16 19142 31149 312002 525133 1024 32 19005 33390 241741 490415 1024 64 19326 90699 867003 1132697 1024 128 19423 25616 1475525 1017811 1024 256 15217 32708 1515083 1490891 1024 512 29632 54704 1499217 1750329 2048 4 4604 6811 135531 156431 2048 8 11770 17423 124756 175977 2048 16 25945 38956 592253 679056 2048 32 16094 49357 749047 526221 2048 64 18470 16589 280736 1021904 2048 128 12235 35822 662557 352989 2048 256 13874 39608 350812 1203947 2048 512 16013 26574 452893 247792 4096 4 3881 7101 125972 92262 4096 8 15036 14352 184513 88224 4096 16 15408 33225 560466 424458 4096 32 27355 50063 790140 677364 4096 64 29685 35641 1020678 773421 4096 128 22067 68050 1213970 328155 4096 256 45703 50466 1210377 830153 4096 512 52406 69860 569363 1113926 8192 4 7333 2550 89168 213717 8192 8 17657 10136 230786 360517 8192 16 18564 22473 322569 409972 8192 32 33852 30036 581453 511901 8192 64 32831 60877 1188104 1090065 8192 128 29670 72603 1234283 861690 8192 256 40053 43453 760006 756909 8192 512 55655 71191 1406122 1303836 16384 4 9051 9638 122266 169478 16384 8 12623 18657 340312 337605 16384 16 24654 40172 196443 290491 16384 32 23358 48059 724729 526865 16384 64 35699 64056 851734 564830 16384 128 64782 34927 920397 670317 16384 256 30303 44143 1310394 610520 16384 512 56344 59471 1808416 874941 32768 4 5873 6194 101226 116206 32768 8 7177 9806 155938 252465 32768 16 25203 17681 513483 349995 32768 32 28764 32141 517669 278123 32768 64 41796 51118 633065 751406 32768 128 43127 33329 647344 620593 32768 256 32872 47310 954445 715318 32768 512 45570 62141 1784555 1019472 65536 4