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Re: Review: Patch to compute Max LSN of Data Pages - Mailing list pgsql-hackers

From 'Andres Freund'
Subject Re: Review: Patch to compute Max LSN of Data Pages
Date
Msg-id 20130708105551.GA14555@awork2.anarazel.de
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In response to Re: Review: Patch to compute Max LSN of Data Pages  (Hari Babu <haribabu.kommi@huawei.com>)
Responses Re: Review: Patch to compute Max LSN of Data Pages
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On 2013-07-08 16:17:54 +0530, Hari Babu wrote:
> +    This utility can also be used to decide whether backup is required or not when the data page
> +    in old-master precedes the last applied LSN in old-standby (i.e., new-master) at the
> +    moment of the failover.
> +   </para>
> +  </refsect1>

I don't think this is safe in any interesting set of cases. Am I missing
something?
People falsely thinking that it can be used for this is the primary
reason for me objecting the patch...

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services

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