Re: physical backup of PostgreSQL

At 12:13 26/06/00 +0200, Zeugswetter Andreas SB wrote:
>After further thought I do think that a physical restore of a backup 
>done with e.g. tar and pg_log as first file of backup does indeed work.

Even if the file backup occurs in the middle of a vacuum?

I like the idea of a non-SQL-based backup method, but it would be nice to
see some kind of locking being done to ensure that the backup is a valid
database snapshot. Can some kind of consistent page dump be done? (Rather
than a file copy)

I believe Vadim's future plans involve reuse of data pages - would this
have an impact on backup integrity?

My experience with applying journals to restored databases suggests that
the journals need to be applied to a 'known' state of the database -
usually a snapshot as of a certain TX Seq No.


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