Re: [9fans] Plan9 topology

[Bakul Shah <bakul+plan9@bitblocks.com>]

On Thu, 13 Jan 2011 21:31:00 MST Duke Normandin <dukeofperl@ml1.net>  wrote:
>
> > I wouldn't try it with less than a 20 GB disk, with say 2 GB for
> > Fossil and the rest for Venti; unless you start storing music and
> > video on there, that should give you plenty of room to work with.
>
> Ok! Can Venti be managed? As in, every so often, purge what isn't
> needed?

Not in the sense that you can purge specific files you don't
want and continue using the same venti. But you can do what a
copying garbage collector does -- it copies all the data
*reachable* from the data `roots' (a set of objects you know
you want). What is left behind is considered garbage and can
be recycled.  Similarly you can use venti tools to copy
backups for specific days to a separate venti archive and
periodically swap the roles of these two ventis.  Though I
don't know of anyone who does this. There is less of a need
to do so as well since only a single copy of a given data
block is stored regardless of how many file contain it.