Re: migrating/backup script

Anyone? Bueller?

What's the usefulness of dumping data (-d/D) and oids (-o) separately?
Should I scrap the extra step for oids? If not what order should I
restore them in? Other than asking people who were around when the stuff
was created, how would I know if I need to dump oids separately?

Justin Georgeson wrote:
> Hello all. I recently came into the position of maintaining several SQL
> database servers. Having no prior experience other then FileMaker, I'm a
> little daunted. :) So one of things I'm doing is moving them to new
> servers. In the process I thought it would be a good idea to come up
> with a backup script I can turn into a cron job. I took a look at the
> scetion on backup/restore in Practical PostGreSQL, and the pg_dump
> manpage. I wanted to split out dumping schema/data/oid/blob into
> separate dump files. Seems the pg_dump I have doesn't support -C or -b,
> or -F. So here's what I have for what's left. In order to automate, I
> have a text file, readable only by root, with the username/pass to
> connect to the database as. That's what the cat file | pg_dump is for.
> I'm very open to improvement on that part of things. Using this, should
> I restore data then oids? Will I have any issues going from 7.0.3 to
> 7.2.1? I'm moving to a RH 7.3 server running the RH 7.2.1 packages. Any
> fatal flaws/gotchas I should be aware of? Thanks in advance.
>
> DBS="db1 db2 db3"
>
> BACKUP="/my/backup/folder"
> DATE=`date +%Y-%m-%d--%H-%M-%S`
>
> check_err() {
> if [ $1 -ne 0 ]; then
> echo "There was an error creating $2"
> fi
> }
>
> cd $BACKUP
> mkdir $DATE && cd $DATE
>
> for DB in $DBS; do
> echo -n "$DB : ... "
> mkdir $DB && cd $DB
>
> # schema
> cat $BACKUP/pass | pg_dump -u -s -f ./$DB.schema $DB > $DB.log 2>&1
> check_err $? $DB.schema
> # data
> cat $BACKUP/pass | pg_dump -u -a -D -f ./$DB.data $DB > $DB.log 2>&1
> check_err $? $DB.data
> # oids
> cat $BACKUP/pass | pg_dump -u -o -f ./$DB.oids $DB > $DB.log 2>&1
> check_err $? $DB.oids
>
> echo "done."
> cd ..
> done
>

--
Justin Georgeson
UnBound Technologies, Inc.
http://www.unboundtech.com
Main 713.329.9330
Fax 713.460.4051
Mobile 512.789.1962

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