>pg_dumpall > alldb.sql (store)
>and
>psql -f alldb.sql postgres (restore)
>is it necessary to drop existing objects (for example roles, ...) ?
>Any help is appreciated.
Last days i'm looking tot he options of pg_dumpall and I think the answer of my question is using option -c.
Using this option pg_dumpall generates at first drop commands for existing objects ...