Jeff Frost wrote: > On Tue, 14 Nov 2006, Bruce Momjian wrote: > > >> In clustering, each server can accept write requests, and these write > >> requests > >> are broadcast from the original server to all other servers before each > >> transaction commits. > >> > >> I guess it's kind of a fine line how it gets defined? > > > > Hmmm. Interesting. Does anyone else have details or an opinion on > > this? The fact that there is something sitting above the servers seems > > to be the defining issue of calling it query broadcast. > > My thinking on the definition of clustering was that there is some smarts for > graceful failover and automated or semi-automated ways of bringing failed DB > servers back up to date and online with the rest of the servers in the > cluster. All servers need to be able to accept writes, but do we
No, even replication servers can have that. > differentiate on where the writes originated (i.e. middleware or another > postgresql server) or on functionality? Fundamentally, broadcast means the queries are being propogated outside the server, with the benefits and limitations inherent in that. -- Bruce Momjian [EMAIL PROTECTED] EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
