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 May 28 09:39:41 2026 Auto Mode Machine = Linux oleg406-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-oleg406-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 4192 12843 13090 36261 64 8 2998 6645 6456 258159 64 16 7393 21102 164906 369844 64 32 2354 3980 15184 614542 64 64 2585 8280 561808 877797 128 4 4506 9494 52806 92694 128 8 7106 10731 59646 24554 128 16 3952 15931 375222 193969 128 32 9815 19732 617941 327399 128 64 5451 39337 499970 624409 128 128 7646 62559 857887 1196221 256 4 1885 3420 27282 62605 256 8 4772 27651 209314 198297 256 16 4290 7186 340027 388360 256 32 7583 16095 237458 278908 256 64 8328 94846 876662 755195 256 128 12625 108702 179531 304797 256 256 10788 45781 450620 1471270 512 4 6032 10312 110747 59820 512 8 4904 6105 70435 174993 512 16 11362 29494 66779 422832 512 32 8648 27332 192914 42223 512 64 21904 30992 416921 86238 512 128 12876 40959 1140576 881269 512 256 9515 111448 360569 1108203 512 512 35131 50236 516122 326772 1024 4 2909 2534 64740 72392 1024 8 9743 18112 42872 37778 1024 16 5263 14932 205247 76241 1024 32 8707 8970 290243 270603 1024 64 11021 33660 348170 219222 1024 128 17188 7264 118283 489465 1024 256 25030 65389 425420 1200447 1024 512 17096 29812 1420384 1365299 2048 4 6066 10601 86282 109337 2048 8 5953 516 71761 196203 2048 16 12120 11326 290123 204884 2048 32 32679 23334 143087 202832 2048 64 12418 35828 329623 206514 2048 128 23068 23124 449315 382236 2048 256 37948 44664 711628 950339 2048 512 26680 142281 138320 720583 4096 4 6171 7739 56057 58729 4096 8 5674 11303 100429 92343 4096 16 10280 11758 110493 136710 4096 32 10452 25722 189621 253746 4096 64 13654 46266 411160 429756 4096 128 31078 28455 277601 582490 4096 256 34071 58401 198940 803105 4096 512 22026 24880 1292126 982054 8192 4 3886 5813 79389 40346 8192 8 7500 12181 90028 69577 8192 16 11699 15308 143079 87299 8192 32 16277 31291 354722 135971 8192 64 23646 28241 271644 222765 8192 128 22065 31890 649279 150182 8192 256 21975 37463 823978 662141 8192 512 63982 38499 346267 618828 16384 4 6571 4647 44485 36264 16384 8 7184 9931 73179 69029 16384 16 22182 18950 222002 256352 16384 32 25117 26737 355702 213066 16384 64 43168 46084 334729 349628 16384 128 29300 39726 602814 930227 16384 256 49250 51211 389456 246872 16384 512 44459 65824 342604 201905 32768 4