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 Jun 29 14:12:57 2026 Auto Mode Machine = Linux oleg404-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-oleg404-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 1243 3198 538156 269025 64 8 4110 20107 645579 659861 64 16 163 35654 350069 778512 64 32 4254 23391 1188789 397796 64 64 3397 22291 1452528 1452528 128 4 2457 1676 498114 485063 128 8 3183 8738 691126 573699 128 16 4257 29058 330828 739689 128 32 5199 27274 1254941 864797 128 64 2358 9097 1229084 1243315 128 128 1701 55675 1406136 1663139 256 4 1922 3560 202829 275261 256 8 2466 17817 395659 583299 256 16 4012 18485 410953 554101 256 32 4102 6738 1117543 341324 256 64 5404 32545 1044693 1132871 256 128 5312 22967 1327564 530031 256 256 9142 16183 1190657 1817419 512 4 2489 3276 514637 245207 512 8 4037 4163 990168 739795 512 16 14516 27947 1343179 1066910 512 32 20620 52800 1471074 1221684 512 64 6190 12469 1252318 1145443 512 128 5827 14619 52540 1209982 512 256 5414 23837 1237168 577155 512 512 15196 87073 906185 1867692 1024 4 2905 2362 201378 280610 1024 8 4028 5969 660174 1233900 1024 16 10995 5954 1082454 712525 1024 32 8148 22218 147169 986485 1024 64 6703 11100 75610 330870 1024 128 10277 17908 410891 1182598 1024 256 11427 14225 979958 253214 1024 512 19044 41627 1503942 943781 2048 4 6089 10313 218196 342081 2048 8 8835 12839 201993 725451 2048 16 13089 15029 371427 444733 2048 32 28025 37513 717034 345952 2048 64 35673 43712 542951 701860 2048 128 18326 42619 234327 783767 2048 256 15993 717 706013 1227869 2048 512 29259 45126 714351 688637 4096 4 4240 3334 122155 146573 4096 8 4262 5352 285850 305334 4096 16 8973 9966 316319 318707 4096 32 35390 11401 583380 497206 4096 64 32037 22883 674360 713336 4096 128 24701 26314 534585 501663 4096 256 47082 38329 806119 366763 4096 512 25701 54995 342789 1493797 8192 4 10392 6180 226054 254852 8192 8 7384 9179 497535 404185 8192 16 7731 8063 220191 556443 8192 32 14024 12449 338780 195929 8192 64 21060 42347 310221 326778 8192 128 21016 25868 659738 459940 8192 256 15061 35632 303644 891515 8192 512 17184 44945 429959 305866 16384 4 4262 3141 397225 326576 16384 8 10776 4464 196363 229307 16384 16 11421 35538 410133 535445 16384 32 17135 39824 589437 792230 16384 64 28651 28828 367816 305119 16384 128 39818 57621 589543 822497 16384 256 29654 62482 860372 1136426 16384 512 31117 86677 577592 314556 32768 4