On Jan 2, 2004, at 9:26 AM, Eric Rescorla wrote:
I'm finally getting to the point where my disk capacity massively
outruns my tape capacity, so I'm thinking of converting to removable
disk-only backup. I could just use Amanda to backup to disk, but I'm
intrigued by Plan 9's archival filesystem where backups from (say Jan 1,
1999) would go in /1999/1/1 and you could just find the files directly
rather than grovelling through dump files.
Is there some standard tool for doing this on FreeBSD? You can't just
do a direct copy cause this results in major disk space wastage so I'm
imagining you need to use hard links or something to keep the size down.
I followed this on your weblog and I may be missing something: I keep coming back to some cocktail of find(1), ctime(3), diff(1) and friends (pax, tar) to locate and mirror only changed files in a duplicated hierarchy. If I'm understanding it, in 1999/1/1 you might have a file tree that looks like the "live" one with only files that were modified on 1999/1/1, but all other files would be links back to their unchanged versions.
I like the idea of it. -- Paul Beard <www.paulbeard.org/> paulbeard [at] mac.com
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