Well when we did evaluate pgsql it didnt cover replication.
maybe u are
right that they dont implement replication because there are
thridparty
solutions available. but ur reffered solution is still
unstable (just read
their mailinglists and checked up their versions) and if ppl
use it for
productive purposes... -- well their business ;) however, i
could not find
any stable solution for circle replication for pgsql so far.
maybe there are
sum available but why searching if there is a databaseserver
which is fast
efficient and has replication built in (and in the next
major update also
native clustering)? it was no meant as an offense but its a
good question:
why usin pgsql-without-replication + thirdparty replication
and not using
mysql-WITH-replication?!
be sure i DO understand pgsql and i know why im not using
it.  i
never
meant to piss on pgsql. ok i would never use it for our
servers but thats my
opinion. ;) so u dont piss on me just because mysql has the
better
replication system built-in! ;) and as far as i can remember
the inital
question to this thread was if there are ppl out with
dbmail/clustering
experience... yes there are...
regards
Simon
-----Original Message-----
From: dbmail-bounces dbmail.org [mailto:dbmail-bouncesdbmail.org] On Behalf
Of Matthew T. O'Connor
Sent: Wednesday, May 18, 2005 6:42 PM
To: DBMail mailinglist
Subject: Re: [Dbmail] DbMail in a ISP Cluster
The Postgresql development team made an intentional design
decided not to
include any one replication system into the main CVS tree
simply because
there are many types of fundamentally different replication
that serve
different purposes.
Slony is well tested, and is used in many production
environments. It is a
master-slave replication system, it works quite well and is
supported by the
slony team. I would not call it non-native. In addition
there are several
other replication implementation that serve different
purposes, some are
commercially supported by a vendor.
Please don't spread FUD about a system you don't understand.
I have not and
would not say a single negative thing about mysql or its
replication because
I don't have experience with it.
Matt
Simon Lange wrote:
>varieties means ports?! branches of the original pgsql
source?! or are
>these thridparty solutions which add external
functionalities which
>pgsql does not provide? however, i would prefer a native
replication
instead a workaround.
>;) especially on productive environments. ;)
>
>however dbmail/mysql provides a tested and working
clustering (circle
>replication) with on fail solution for all those who may
need it. so
>why using a pgsql with non-native replication if there
is a stable
>native mysql replication solution available?
>
>regards
>
>Simon
>
>
>Simon Lange //Director
>========================
>www.polynaturedesign.com
>+49[0]4131 220121 PHONE
>+49[0]4131 224730 FAX
>+49[0]16090300077 CELL
>========================
>
>-----Original Message-----
>From: dbmail-bouncesdbmail.org
[mailto:dbmail-bouncesdbmail.org] On
>Behalf Of Matthew T. O'Connor
>Sent: Wednesday, May 18, 2005 5:58 PM
>To: DBMail mailinglist
>Subject: Re: [Dbmail] DbMail in a ISP Cluster
>
>Postgresql does support replication, in fact there are
several
>different varieties of it available, check out slony1
among others.
>What it doesn't support is automatic failover.
>
>Simon Lange wrote:
>
>
>
>>pgsql does not support replication. thats why we do
use mysql -
>>clustering is announced for mysql5 
>>
>>if a database goes down, exim recognizes this and
temporaly refuses
>>any mails which causing foreign mta to address the
other mta...
>>
>>regards
>>
>>Simon
>>
>>
>>Simon Lange //Director
>>========================
>>www.polynaturedesign.com
>>+49[0]4131 220121 PHONE
>>+49[0]4131 224730 FAX
>>+49[0]16090300077 CELL
>>========================
>>
>>-----Original Message-----
>>From: dbmail-bouncesdbmail.org
[mailto:dbmail-bouncesdbmail.org] On
>>Behalf Of Niblett, David A
>>Sent: Wednesday, May 18, 2005 5:04 PM
>>To: 'dbmaildbmail.org'
>>Subject: [Dbmail] DbMail in a ISP Cluster
>>
>>What are you all using to cluster PostgreSQL? I
looked at the
>>master/slave replication that comes with Postgres.
It seems fine if
>>you want to replicate the data, but how do you get
dbmail to switch
>>databases when there is a failure?
>>
>>I'm currently using drbd to replicate the disk block
device that my
>>postgres database is stored on, then only run
postgres on the "primary"
>>
>>
>machine.
>
>
>>Linux heartbeat fails and starts the services on the
"secondary"
>>machine shold the first one croak.
>>
>>--
>>David A. Niblett | email:
niblettdagru.net
>>Network Administrator | Phone: (352)
334-3400
>>Gainesville Regional Utilities | Web: http://www.gru.net/
>>
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>>
>>
>>
>>
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