Hi Henk/All,
I see a IO drop to "zero", for 3-4 seconds on btrfs File system. Looks like to be a just a reporting bug from vdbench. tried with latest vdbench50403 too.
I do not see this behavior using other tools with same load profile. With other file systems however this is not easily reproducible.
Do you have any insight on this ?
snippet of vdbench log on IO run on lv :
{noformat}
19:06:16.044 34 10953 0.01 25.2 23.2 92.0 10079 0.01 874.0 0.02 78.74 6.83 85.57 8192 0.0 0.00 0.0 0.00 0.0 0.00 76.0 0.00 76.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00
19:06:17.044 35 0.0 0.00 17.4 17.2 0.0 0.0 0.00 0.0 0.00 0.00 0.00 0.00 0 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00
19:06:18.044 36 0.0 0.00 15.9 15.8 0.0 0.0 0.00 0.0 0.00 0.00 0.00 0.00 0 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00 0.0 0.00
19:06:19.048 37 281461 0.80 71.2 26.4 91.6 257839 0.04 23622 9.11 2014 184.5 2198.9 8192 0.0 0.00 0.0 0.00 0.0 0.00 2013 0.01 2013 0.00 0.0 0.00 0.0 0.00 0.0 0.00
19:06:20.058 38 422354 0.02 91.6 24.3 91.7 387296 0.02 35058 0.02 3025 273.8 3299.6 8192 0.0 0.00 0.0 0.00 0.0 0.00 3029 0.01 3029 0.00 0.0 0.00 0.0 0.00 0.0 0.00