On Apr 30, 2013, at 11:34 PM, Yang Zhang wrote:

> In other words, I guess, I'm asking because of Xof's comment on that blog 
> post:
> 
> "That’s true if you recreate the PG_ directory in the tablespace;
> otherwise, you get the error:
> reindexdb: reindexing of database "test" failed: ERROR: could not
> create directory "pg_tblspc/69944/PG_9.2_201204301/61884": No such
> file or directory
> However, that’s not a guaranteed feature of PostgreSQL, and I would
> never rely on it."

Well, here's the core situation: If the underlying storage for a tablespace 
disappears, you have to patch up the database by recreating the directory in 
order for the database to be operational again.  This isn't a documented 
PostgreSQL API; it's a disaster recovery procedure.  It works now, it probably 
will work in the future, but I don't think there's any guarantee that the 
procedure that works today will work tomorrow.

Thus, I really don't recommend making an operational decision that the lost of 
a tablespace's storage is considered something routine.

That being said, you can make it work today if it is critical that it do so.

--
-- Christophe Pettus
   x...@thebuild.com



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