Обсуждение: Locking a database
Hello all! I want to make a pg_dump of a database, but I must be sure that no one is logged in. Which is the best way to do it? Thanks in advance _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com
On Monday 30 April 2001 02:37 pm, Jose Norberto wrote: > Hello all! > I want to make a pg_dump of a database, but I must be sure that no one is > logged in. Which is the best way to do it? > Thanks in advance Change the permissions in the pg_hba.conf file (/usr/local/pgsql/data/pg_hba.conf is the default placement) The bottom of the file looks like: # Put your actual configuration here # ---------------------------------- # This default configuration allows any local user to connect as any # PostgreSQL username, over either UNIX domain sockets or IP: local all trust host all 127.0.0.1 255.255.255.255 trust # If you want to allow non-local connections, you will need to add more # "host" records (and don't forget to start the postmaster with "-i"!). # CAUTION: if you are on a multiple-user machine, the above default # configuration is probably too liberal for you --- change it to use # something other than "trust" authentication. Michelle -- ------------ Michelle Murrain, Ph.D. President Norwottuck Technology Resources mpm@norwottuck.com http://www.norwottuck.com
"Jose Norberto" <nn_jose@hotmail.com> writes:
> I want to make a pg_dump of a database, but I must be sure that no one is
> logged in.
Why?
pg_dump will return a consistent state of the database even if other
transactions are proceeding meanwhile.
regards, tom lane
At 03:08 PM 4/30/01 -0400, Tom Lane wrote: >"Jose Norberto" <nn_jose@hotmail.com> writes: >> I want to make a pg_dump of a database, but I must be sure that no one is >> logged in. > >Why? > >pg_dump will return a consistent state of the database even if other >transactions are proceeding meanwhile. Maybe it's a final dump before a db upgrade/swap. The consistent database state must also be consistent with what the rest of the world thinks. e.g. no customers ordering stuff or users doing stuff that's left out in the pg_dump. Cheerio, Link.