| From: | Markus Wanner <markus(at)bluegap(dot)ch> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Hannu Krosing <hannu(at)krosing(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, josh(at)agliodbs(dot)com, Dimitri Fontaine <dfontaine(at)hi-media(dot)com>, "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Automatic Client Failover |
| Date: | 2008-08-05 10:30:13 |
| Message-ID: | 48982BB5.2070102@bluegap.ch |
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| Lists: | pgsql-hackers |
Hi,
Simon Riggs wrote:
> On Tue, 2008-08-05 at 11:50 +0300, Hannu Krosing wrote:
>> I guess having the title "Automatic Client Failover" suggest to most
>> readers, that you are trying to solve the client side separately from
>> server.
>
> Yes, that's right: separately. Why would anybody presume I meant "and by
> the way you can turn off all other HA measures not mentioned here"? Not
> mentioning a topic means no change or no impact in that area, at least
> on all other hackers threads.
I think the pgbouncer-in-core idea caused some confusion here.
IMO the client failover method is very to what DNS round-robin setups do
for webservers: even if clients might failover 'automatically', you
still have to maintain the server states (which servers do you list in
the DNS?) and care about 'replication' of your site to the webservers.
Regards
Markus Wanner
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