| From: | Alan Hodgson <ahodgson(at)reinvent(dot)com> |
|---|---|
| To: | pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: pgsql cluster |
| Date: | 2009-11-21 00:05:09 |
| Message-ID: | 200911201605.09298@hal.medialogik.com |
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| Lists: | pgsql-novice |
On Friday 20 November 2009, Démi Zsolt <zsdemi(at)gmail(dot)com> wrote:
> Which clustering solution is the better for me? Can I setup two
> loadbalancer to be redundant? Can access the same database on the
> shared storage the two postgresql server?
Well, if it's an important application, you should probably hire someone who
knows what they're doing to set it up; this stuff is complex and easy to
get wrong. But the short answers are:
Yes you can setup 2 load balancers to be redundant, there are several
clustering solutions available for Linux or other operating systems.
Linux-HA is a good place to start.
No, you cannot run 2 instances of PostgreSQL against the same physical
database. You could use Linux-HA tools (ie. heartbeat) to make an
active/passive cluster of the 2 database/web servers, though. Proper
fencing is going to be important on shared storage. Make sure you're also
doing real backups of the database.
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