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: Thu Sep 10 13:31:18 2026 Auto Mode Machine = Linux oleg621-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-oleg621-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 1530 7353 639427 280847 64 8 1415 28132 789967 718114 64 16 3442 16985 955947 811459 64 32 2294 6602 1049372 799377 64 64 4567 37450 799377 1124074 128 4 1971 8104 584950 522346 128 8 5416 6714 831319 604036 128 16 3702 28198 927549 795593 128 32 4390 23088 1015251 902598 128 64 7942 68271 1240443 1254941 128 128 6204 11177 1217930 1911894 256 4 4871 9657 584570 519266 256 8 9717 11686 266383 663292 256 16 6092 28174 996229 870268 256 32 14206 47922 1202660 697322 256 64 12826 42722 787312 1201314 256 128 17175 66199 1534342 551823 256 256 6830 41411 1683493 1591186 512 4 4170 3174 62157 102053 512 8 4277 7831 823167 681782 512 16 8287 18307 1036527 599553 512 32 16192 23124 1179413 1264113 512 64 12563 30213 1312798 746481 512 128 20914 45185 280101 781526 512 256 9124 31968 1434711 594573 512 512 26907 51675 1640796 2107844 1024 4 4959 4610 295780 309819 1024 8 6942 10202 936782 326196 1024 16 12643 25458 181200 175191 1024 32 9519 26003 108670 260556 1024 64 18053 23263 610270 661089 1024 128 17872 38627 984676 1219189 1024 256 24731 44151 1503942 301363 1024 512 22103 57935 664875 562624 2048 4 8249 5595 302421 108785 2048 8 10060 18352 252616 288487 2048 16 11983 15295 1146730 804089 2048 32 22542 14663 1141700 360183 2048 64 19068 41543 501344 1147343 2048 128 26721 45708 535304 405629 2048 256 33412 77385 758238 745860 2048 512 47905 67485 1646588 1425051 4096 4 4870 6324 154683 153915 4096 8 6080 5968 519534 303881 4096 16 12334 17669 451997 373826 4096 32 20491 21963 525124 507502 4096 64 17448 31368 702687 322446 4096 128 20198 28484 664834 778997 4096 256 38221 46411 1049421 858529 4096 512 22963 48433 234663 424941 8192 4 5301 2123 183610 163539 8192 8 10633 13614 663113 467417 8192 16 12337 15426 516192 320628 8192 32 15411 25038 420380 536378 8192 64 25210 29066 802276 437470 8192 128 32213 48034 383197 617427 8192 256 22485 38109 924175 760426 8192 512 44623 50185 724509 802988 16384 4 6148 6716 288613 184195 16384 8 10933 11322 346070 435443 16384 16 15159 20379 568122 407865 16384 32 13179 20341 742802 563349 16384 64 21693 30234 342026 606586 16384 128 17343 36034 896234 820797 16384 256 33176 70266 519398 331827 16384 512 25430 45804 665855 441438 32768 4 4591 4842 208741 378921 32768 8 9050 14426 210200 262349 32768 16 11400 11751 303787 221777 32768 32