Re: Core team statement on replication in PostgreSQL - Mailing list pgsql-hackers

Alvaro Herrera wrote:
> Bruce Momjian wrote:
> > Alvaro Herrera wrote:
> > > Bruce Momjian wrote:
> > > 
> > > > Added to TODO:
> > > > 
> > > >         o Reduce PITR WAL file size by removing full page writes and
> > > >           by removing trailing bytes to improve compression
> > > 
> > > If we remove full page writes, how does hint bit setting get propagated
> > > to the slave?
> > 
> > We would remove full page writes that are needed for crash recovery, but
> > perhaps keep other full pages.
> 
> How do you tell which is which?

The WAL format would have to be modified to indicate which entries can
be discarded.

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
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