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Thread: Pgpool-II, pgcluster, or pgbouncer?

Pgpool-II, pgcluster, or pgbouncer?

From
"Joseph Mays"
Date:
I have a site that has a postgres database server. 24 hour availability is pretty critical to them, so I want to turn it into a redundant cluster for high availability. I currently have a streaming backup server, but we want to be able to make either server capable of accepting writes in the case one fails. The problem with streaming backup is that we can promote the backup when the master fails, but when the master comes backup you basically have to rebuild the entire database and reconfigure postgres on it to either make it the master or make it into a new streaming backup. We want something that’s much more dynamic, so writes can go either direction in the event of one or the failing, and so that things will automatically resync when a failed server in the cluster comes back online.
Given these goals – pgpool-II, pgcluster, pgbouncer? Some other tool that I haven’t even considered?
 
 

Re: Pgpool-II, pgcluster, or pgbouncer?

From
"Gilberto Castillo"
Date:

> I have a site that has a postgres database server. 24 hour availability is
> pretty critical to them, so I want to turn it into a redundant cluster for
> high availability. I currently have a streaming backup server, but we want
> to be able to make either server capable of accepting writes in the case
> one fails. The problem with streaming backup is that we can promote the
> backup when the master fails, but when the master comes backup you
> basically have to rebuild the entire database and reconfigure postgres on
> it to either make it the master or make it into a new streaming backup. We
> want something that’s much more dynamic, so writes can go either direction
> in the event of one or the failing, and so that things will automatically
> resync when a failed server in the cluster comes back online.
>
> Given these goals – pgpool-II, pgcluster, pgbouncer? Some other tool that
> I haven’t even considered?

Your need multi-Master?

Saludos,
Gilberto Castillo
La Habana, Cuba
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Re: Pgpool-II, pgcluster, or pgbouncer?

From
Jorge Fernandez
Date:
repmgr may do the work, but you have to script the promote.sh to migrate the hostname or elastic Ip to direct the request to the new master, after the crash you have to manually do the failback: (clone-sync-failover) 

pgpool II  with hot-stream mode is pretty sensitive to detect a failover and promote the slave  , causing false-failover scenario. 


2014-07-17 13:53 GMT-03:00 Joseph Mays <mays@win.net>:
I have a site that has a postgres database server. 24 hour availability is pretty critical to them, so I want to turn it into a redundant cluster for high availability. I currently have a streaming backup server, but we want to be able to make either server capable of accepting writes in the case one fails. The problem with streaming backup is that we can promote the backup when the master fails, but when the master comes backup you basically have to rebuild the entire database and reconfigure postgres on it to either make it the master or make it into a new streaming backup. We want something that’s much more dynamic, so writes can go either direction in the event of one or the failing, and so that things will automatically resync when a failed server in the cluster comes back online.
Given these goals – pgpool-II, pgcluster, pgbouncer? Some other tool that I haven’t even considered?
 
 



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Re: Pgpool-II, pgcluster, or pgbouncer?

From
"Joseph Mays"
Date:
> Your need multi-Master?

I am assuming that will give us the highest availability with the most
dynamic failover and recovery, yes.


-----Original Message-----
From: Gilberto Castillo
Sent: Thursday, July 17, 2014 2:00 PM
To: Joseph Mays
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Pgpool-II, pgcluster, or pgbouncer?



> I have a site that has a postgres database server. 24 hour availability is
> pretty critical to them, so I want to turn it into a redundant cluster for
> high availability. I currently have a streaming backup server, but we want
> to be able to make either server capable of accepting writes in the case
> one fails. The problem with streaming backup is that we can promote the
> backup when the master fails, but when the master comes backup you
> basically have to rebuild the entire database and reconfigure postgres on
> it to either make it the master or make it into a new streaming backup. We
> want something that’s much more dynamic, so writes can go either direction
> in the event of one or the failing, and so that things will automatically
> resync when a failed server in the cluster comes back online.
>
> Given these goals – pgpool-II, pgcluster, pgbouncer? Some other tool that
> I haven’t even considered?

Your need multi-Master?

Saludos,
Gilberto Castillo
La Habana, Cuba






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Re: Pgpool-II, pgcluster, or pgbouncer?

From
"Joseph Mays"
Date:
I only just now discovered postgres-xc. Is there anyone out there using it in a production environment who can comment on it?
 
Sent: Thursday, July 17, 2014 12:53 PM
Subject: [ADMIN] Pgpool-II, pgcluster, or pgbouncer?
 
I have a site that has a postgres database server. 24 hour availability is pretty critical to them, so I want to turn it into a redundant cluster for high availability. I currently have a streaming backup server, but we want to be able to make either server capable of accepting writes in the case one fails. The problem with streaming backup is that we can promote the backup when the master fails, but when the master comes backup you basically have to rebuild the entire database and reconfigure postgres on it to either make it the master or make it into a new streaming backup. We want something that’s much more dynamic, so writes can go either direction in the event of one or the failing, and so that things will automatically resync when a failed server in the cluster comes back online.
Given these goals – pgpool-II, pgcluster, pgbouncer? Some other tool that I haven’t even considered?