On Wed, Sep 8, 2010 at 9:02 PM, Lazaro Ruben Garcia Martinez <lgarciam@xxxxxxxxxxxxxxxxxx> wrote: > Thank you very much for your answer, In the cluster that i said before I > need only failover. > In the documentation of postgresql I read about the Shared Disk Failover, > this tecnique avoids synchronization overhead by having only one copy of the > database. It uses a single disk array that is shared by multiple servers. If > the main database server fails, the standby server is able to mount and > start the database as though it was recovering from a database crash. This > allows rapid failover with no data loss. One disadvantage is that the > standby server should never access the shared storage while the primary > server is running. > > For these resons is posible to use a SAN? Yes, however, a SAN is not a replacement for some kind of streaming replication in case you need to recover a database to a previous uncorrupted state or should the SAN fail in some catastrophic way. You need to look up "fencing" for your servers. -- To understand recursion, one must first understand recursion. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
