| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, jd(at)commandprompt(dot)com, Thom Brown <thom(at)linux(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Dave Page <dpage(at)pgadmin(dot)org>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Configuring synchronous replication |
| Date: | 2010-09-23 16:55:56 |
| Message-ID: | AANLkTikqNKsbr5TYRyeHEJk3bfjit+aCjPvkPqT=_6oS@mail.gmail.com |
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| Lists: | pgsql-committers pgsql-hackers |
On Thu, Sep 23, 2010 at 12:52 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
>> On Thu, 2010-09-23 at 11:43 -0400, Tom Lane wrote:
>>> Well, for one thing, how do you add a new slave? If its configuration
>>> comes from a system catalog, it seems that it has to already be
>>> replicating before it knows what its configuration is.
>
>> At the moment, I'm not aware of any proposed parameters that need to be
>> passed from master to standby, since that was one of the arguments for
>> standby registration in the first place.
>
>> If that did occur, when the standby connects it would get told what
>> parameters to use by the master as part of the handshake. It would have
>> to work exactly that way with standby.conf on the master also.
>
> Um ... so how does this standby know what master to connect to, what
> password to offer, etc? I don't think that "pass down parameters after
> connecting" is likely to cover anything but a small subset of the
> configuration problem.
Huh? We have that stuff already.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company
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