I am trying to use a different drive for the data.
I have edited postgres.conf to point to the new location, but I get the error /pgdata/PG_VERSION is missing.
Do I have to do a initdb?
When I try an initdb it says it is not empty. (has lost and found folder in it).
Create a sub-directory. Separate filesystems will have a lost+found folder at the top-level, so you'll need to create a directory called pgsql (or whatever).
Fedora Core 3 linux.
I was able to do an init db if I create a folder called data in the pgdata, but I was not sure if it then would use that folder for all the files (I just want my data to be there).
Ah - there you go then. All files live there unless you use tablespaces/symbolic links.
I also want to move my wal files to the /wal drives once I get it to start using pgdata drive for data.
I got some info on this
0) backup your data
1) stop postmaster and verify.
2) cd $PGDATA; mv pg_xlog original_pg_xlog; ln -s /wal pg_xlog; cp original_pg_xlog/* pg_xlog
3) start postmaster and confirm correct startup in log files.
Will this work? I am guessing this info would be in the var/lib folder not the /pgdata folder?
Well, what you might want to do is: 1. Setup your .../pgsql/data folder on the WAL drive. 2. initb that location 3. Set up a tablespace for your data on the other drive(s)
You can then have a default location for your database, and even move a single table over to its own drive(s) if that's what you need. Details in the manuals (start at chapter 18, then check the details in the SQL reference).
I'd test it with a sample database first, make sure you're practiced with it. Oh - if you do filesystem backups when the database is stopped, make sure you remember to back up the alternate tablespace.
Thanks in advance and sorry for asking so many dumb newb questions.
Least this time the install of 8 went super smooth, just went to the postgres site and got the rpm's (Since I did not install 7 with the OS it asked for the fedora cd's a few times but all rpm's went ok).
Excellent.
On the 8.1 files which are in tar files do I need to get those as well to get to 8.1 if so what is the procedure other then copying the files to my system (I have the .tar.bz)
It'll be 8.0.1 rather then 8.1 and they'll be source files. You unpack them run configure and make and out pops a new version of PG. I'd recommend sticking with the RPMs for the moment.
-- Richard Huxton Archonet Ltd
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