Message-ID: <54F44B93.401@iki.fi>
Date: Mon, 02 Mar 2015 13:37:55 +0200
From: Heikki Linnakangas <hlinnaka@iki.fi>
Reply-To: hlinnaka@iki.fi
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To: Fujii Masao <masao.fujii@gmail.com>, Josh Berkus <josh@agliodbs.com>
CC: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: remove pg_standby?
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On 03/02/2015 11:53 AM, Fujii Masao wrote:
> On Sat, Feb 28, 2015 at 5:00 AM, Josh Berkus <josh@agliodbs.com> wrote:
>> On 11/10/2014 10:54 AM, Magnus Hagander wrote:
>>> On Mon, Nov 10, 2014 at 7:48 PM, Heikki Linnakangas
>>> <hlinnakangas@vmware.com> wrote:
>>>> pg_standby is more configurable than the built-in standby_mode=on. You can
>>>> set the sleep time, for example, while standby_mode=on uses a hard-coded
>>>> delay of 5 s. And pg_standby has a configurable maximum wait time. And as
>>>> Fujii pointed out, the built-in system will print an annoying message to the
>>>> log every time it attempts to restore a file. Nevertheless, 99% of users
>>>> would probably be happy with the built-in thing.
>>>
>>> As long as pg_standby has features that are actually useful and that
>>> are not in the built-in system, we shouldn't remove it. We should,
>>> however, try to fix those in the main system so we can get rid of it
>>> after that :)
>>
>> As of current 9.5, we have configurable retries and standby delay in
>> mainstream.  Is there some reason we still need pg_standby?
>
> Yes, it's not easy to perform "fast failover" without pg_standby for now.

What is "fast failover"?

- Heikki


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