sort.go: ByPart([]*metricData,int) byPartBase is better as an unexported func [golint]
sort.go: ByPart([]*metricData,int) byPartBase is better as an unexported func [golint]

sort.go:51:1: comment on exported function ByPart should be of the form "ByPart ..."
sort.go:52:46: exported func ByPart returns unexported type main.byPartBase, which can be annoying to use

errx/carbonapi,nnuss/carbonapi,arodland/carbonapi,dgryski/carbonapi,errx/carbonapi