With rrdsingle the average values are used for graphing. As the
timescale increases (say over a day or month) the average values
progressively reduce. Using the maximum value over the longer periods
is arguably no less deceptive but it does produce more informative
graphs.
V2 - Invert the default path logic related to rra.single
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
-- is first source in stack or overlay source: source_stk = source_nnl
if not prev or source.overlay then
-- is first source in stack or overlay source: source_stk = source_nnl
if not prev or source.overlay then
+ if self.opts.rrasingle then
-- create cdef statement for cumulative stack (no NaNs) and also
-- for display (preserving NaN where no points should be displayed)
_tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname )
_tif( _args, "CDEF:%s_plot=%s_avg", source.sname, source.sname )
-- create cdef statement for cumulative stack (no NaNs) and also
-- for display (preserving NaN where no points should be displayed)
_tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname )
_tif( _args, "CDEF:%s_plot=%s_avg", source.sname, source.sname )
+ else
+ -- create cdef statement for cumulative stack (no NaNs) and also
+ -- for display (preserving NaN where no points should be displayed)
+ _tif( _args, "CDEF:%s_stk=%s_nnl", source.sname, source.sname )
+ _tif( _args, "CDEF:%s_plot=%s_max", source.sname, source.sname )
+ end
-- is subsequent source without overlay: source_stk = source_nnl + previous_stk
else
-- is subsequent source without overlay: source_stk = source_nnl + previous_stk
else
+ if self.opts.rrasingle then
-- create cdef statement
_tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev )
_tif( _args, "CDEF:%s_plot=%s_avg,%s_stk,+", source.sname, source.sname, prev )
-- create cdef statement
_tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev )
_tif( _args, "CDEF:%s_plot=%s_avg,%s_stk,+", source.sname, source.sname, prev )
+ else
+ -- create cdef statement
+ _tif( _args, "CDEF:%s_stk=%s_nnl,%s_stk,+", source.sname, source.sname, prev )
+ _tif( _args, "CDEF:%s_plot=%s_max,%s_stk,+", source.sname, source.sname, prev )
+ end
end
-- create multiply by minus one cdef if flip is enabled
end
-- create multiply by minus one cdef if flip is enabled