Re: fsync-pgdata-on-recovery tries to write to more files than previously

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От Alvaro Herrera
Тема Re: fsync-pgdata-on-recovery tries to write to more files than previously
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Msg-id 20150525200614.GP5885@postgresql.org
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Ответ на Re: fsync-pgdata-on-recovery tries to write to more files than previously  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: fsync-pgdata-on-recovery tries to write to more files than previously  (Tom Lane <tgl@sss.pgh.pa.us>)
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Tom Lane wrote:
> Stephen Frost <sfrost@snowman.net> writes:
> > I've not followed this thread all that closely, but I do tend to agree
> > with the idea of "only try to mess with files that are *clearly* ours to
> > mess with."
> 
> Well, that opens us to errors of omission, ie failing to fsync things we
> should have.  Maybe that's an okay risk, but personally I'd judge that
> "fsync everything and ignore (some?) errors" is probably a more robust
> approach over time.

How is it possible to make errors of omission?  The list of directories
in initdb is the complete set of directories that are created for a
newly-initdb'd database, no?  Surely there can't be a database that
contains vital directories that are not created there?  See "subdirs"
static in initdb.c.

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



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