Re: emergency outage requiring database restart

Merlin Moncure wrote:

> OK, I have some good (very- in the specific case of yours truly) news
> to report.  Doing a filesystem level copy to a test server I was able
> to relfilenode swap one of the critical tables over the place of the
> refilenode of the stored backup.  Not being able know the file to copy
> from, I figured out the source node by judging the size and using
> 'strings'  utility.  Data recovery for that table at least appears to
> be 100%.

FWIW you can use pg_filedump and match based on the number of columns.
I suppose you could also use the pageinspect extension, by 'dd'ing a
page from the file into the database and feeding into heap_page_items as
bytea.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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