Re: file cloning in pg_upgrade and CREATE DATABASE

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От Peter Eisentraut
Тема Re: file cloning in pg_upgrade and CREATE DATABASE
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Msg-id d4bc3dae-fdea-2407-5629-cac68be893a3@2ndquadrant.com
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Ответ на Re: file cloning in pg_upgrade and CREATE DATABASE  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
Ответы Re: file cloning in pg_upgrade and CREATE DATABASE
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On 11/10/2018 16:50, Peter Eisentraut wrote:
> On 10/10/2018 21:50, Bruce Momjian wrote:
>>> I see.  Peter is proposing to have a fourth mode, essentially
>>> --transfer-mode=clone-or-copy.
>>
>> Uh, if you use --link, and the two data directories are on different
>> file systems, it fails.  No one has ever asked for link-or-copy, so why
>> are we considering clone-or-copy?  Are we going to need
>> link-or-clone-or-copy too?  I do realize that clone and copy have
>> non-destructive behavior on the old cluster once started, so it does
>> make some sense to merge them, unlike link.
> 
> I'm OK to get rid of the clone-or-copy mode.  I can see the confusion.

New patch that removes all the various reflink modes and adds a new
option --clone that works similar to --link.  I think it's much cleaner now.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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