Snapshot backups

Hey All,

This is a message to confirm my thoughts / validate a possible approach.

In a situation where PGDATA and {XLOG, ARCHIVELOG} are on different SAN/NAS
volumes and a backup is to be initiated do pg_start_backup and
pg_stop_backup need to be used?

I am using snapshots of each volume for backup.

My thinking is that they are not needed (although I realise it is good
practice).

As far as I can tell all they are doing is something like:

pg_start_backup:
- create backup label
- trigger checkpoint

pg_stop_backup
- remove backup label file
- creates backup history file
- trigger log switch

There is nothing in here that is *required* from a backup point of view. Am
I missing anything?

James Sewell
Solutions Architect
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