I am trying to develop a plan for a high-availability (HA)
implementation of a database using PostgreSQL. One wrinkle; the data we
receive is performance data, and occassional loss of some measurements
is Ok for us. [I know, this is not in the main stream of database users
:-)].
I have looked ar rserv and pg-replicator, and they seem to be targeted
at replication without specific HA support. Replication is great for
lots of things; but I need HA more than ACID replication.
I have seen a proposed solution that uses *rsync* on the database files
between machines and linux-ha to roll over the network access to the
available machine. My question is pretty simple; can something as
*simple* as rsync make a full copy of the database consistently between
the machines? That seems just too easy.
If I replace the process with something that uses pg_dump and rsync that
file (ok, now that seems more likely to generate a consistent database
image) that and restore that into the slave, does this work? Obviously,
this approach is kinda a hammer approach; the poor active server will be
dumping till the cows come home.
Any and all feedback and comments are greatly appreciated. And, as
always, thanks in advance,
Charlie
--
Charles H. Woloszynski
ClearMetrix, Inc.
115 Research Drive
Bethlehem, PA 18015
tel: 610-419-2210 x400
fax: 240-371-3256
web: www.clearmetrix.com