May I merge several increment backups to one?
c182driver9 at gideon.org
Thu Dec 21 17:14:00 GMT 2006
On Wed, 06 Dec 2006 08:47:42 +0800, woo robbin wrote:
> How can I merge the two increment backups into one directory,say
> /backupdir/increment ?
I suggest you look into exploiting the --link-dest option in your backups.
Using this, each backup has the performance of an incremental (both in
terms of network and disk space utilization) but produces a complete
snapshot as if it had been a full. This is achieved by hard-linking back
to the previous snapshot for any files not changed since that previous
Because these are hard links, it is safe to remove any previous snapshot;
it won't render a later snapshot unusable.
Most, if not all, of the issues associated with incremental backups
disappear using this scheme, yet the performance is still
incremental-like. And because complete snapshots are always produced,
there's no need for an occasional full backup (excluding the first backup
of any volume, of course).
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