Hi all, I have some questions about backup on PostgreSQL:
1) pg_dumpall I am sure that this is asked in somewhere: why the pg_dumpall does not support custom or tar format like pg_dump. I have heard that the custom format could be faster and may generate a smaller dump file. Is the feature enhancement being developed? 2) pg_start_backup in postgresql 8.4 After issuing pg_start_backup, we can take the file based backup (by tar/snapshot) on the postgresql data directory. If the use of file system snapshot is not possible. It is possible that there is file changes (added or file size changed) between the pg_start_backup and pg_stop_backup. Is the backup consistent? 3) extension of 2): If the postgresql version is 9.2 Is pg_basebackup better than pg_start_backup + file based backup + pg_stop_backup? 4) For the WAL backup in postgresql 8.4 After the archive mode is on and WAL is backup, how do I remove the old WAL files? How about newer version (for example 9.2?) Thanks and regards, Patrick
