> > From there on, one could potentially create a matrix: (proportional > font art, apologies): > > | subvol1 | subvol2 | subvol3 | > ----------+----------+----------+----------+ > subvol1 | 200M | 20M | 50M | > ----------+----------+----------+----------+ > subvol2 | 20M | 350M | 22M | > ----------+----------+----------+----------+ > subvol3 | 50M | 22M | 634M | > ----------+----------+----------+----------+ > > The diagonal obviously shows the "unique" blocks, subvol2 and subvol1 > share 20M data, etc. Missing from this plot would be "how much is > shared between subvol1, subvol2, and subvol3" together, but it's a > start and not something that hard to understand. One might add a > column for "total size" of each subvol, which may obviously not be an > addition of the rest of the columns in this diagram. > > Anyway, something like this would be high on my list of `df` numbers > I'd like to see - since I think they are useful numbers. >
This is an interesting way to look at it Ganglia typically records time series data, it is quite conceivable to create a metric for every permutation in each and store that in rrdtool The challenge would then be in reporting on the data: the rrdtool graphs use time as an X-axis, and then it can display multiple Y values However, now that I've started thinking about the type of data generated from btrfs, I was wondering if some kind of rr3dtool is needed - a 3D graphing solution - or potentially making graphs that do not include time on any axis? Has anyone seen anything similar for administering ZFS, for example? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
