Re: [HACKERS] Fix for large file support (nonsegment mode support)

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От Tom Lane
Тема Re: [HACKERS] Fix for large file support (nonsegment mode support)
Дата
Msg-id 2247.1205191243@sss.pgh.pa.us
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Ответ на Re: [HACKERS] Fix for large file support (nonsegment mode support)  (Peter Eisentraut <peter_e@gmx.net>)
Ответы Re: [HACKERS] Fix for large file support (nonsegment mode support)  (Peter Eisentraut <peter_e@gmx.net>)
Re: [HACKERS] Fix for large file support (nonsegment mode support)  ("Zeugswetter Andreas OSB SD" <Andreas.Zeugswetter@s-itsolutions.at>)
Re: [HACKERS] Fix for large file support (nonsegment mode support)  (Larry Rosenman <ler@lerctr.org>)
Список pgsql-patches
Peter Eisentraut <peter_e@gmx.net> writes:
> Tom Lane wrote:
>> Applied with minor corrections.

> Why is this not the default when supported?

Fear.

Maybe eventually, but right now I think it's too risky.

One point that I already found out the hard way is that sizeof(off_t) = 8
does not guarantee the availability of largefile support; there can also
be filesystem-level constraints, and perhaps other things we know not of
at this point.

I think this needs to be treated as experimental until it's got a few
more than zero miles under its belt.  I wouldn't be too surprised to
find that we have to implement it as a run-time switch instead of
compile-time, in order to not fail miserably when somebody sticks a
tablespace on an archaic filesystem.

            regards, tom lane

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