On Thu, Oct 11, 2012 at 07:38:07PM -0700, John R Pierce wrote: > On 10/11/12 7:15 PM, Vishalakshi Navaneethakrishnan wrote: > >We have our production environment database server in Postgres 8.3 > >version. we have planned to upgrade to lastest version 9.1. Dump > >from 8.3 and restore in Postgres 9.1 takes more than 5 hours. Any > >other quick method to upgrade from 8.3 to 9.1. We need to reduce > >our downtime below 1 hour. Any Possibilities..? > > > is it the dump or the restore taking the lions share of that time? > > I don't know if pg_upgrade supports 8.3, but that would be one > approach. getting it setup to work correctly can require some > tinkering, but once you have that sorted, you start with a base > backup of the 8.3 file system, and pg_upgrade 'converts' it to the > newer version. you need both runtimes setup side by side so either > can be run as pg_upgrade will need to start the old version in order > to dump its metadata catalogs prior to migrating the data files. if > you put both data directories on the same file system, it can use > hard linking to 'move' the datafiles. Upgrading with pg_upgrade from 8.3 is going to require 9.2 to be compiled with --disable-integer-datetimes. -- Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
