Re: PostgreSQL file system based restore from Linux to Windows

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On 3 Jan 2015 12:54 am, Bruce Momjian <bruce@xxxxxxxxxx> wrote:
>
> On Fri, Jan  2, 2015 at 06:56:47PM +0800, Craig Ringer wrote: 
> > On 12/31/2014 02:28 PM, Tom Lane wrote: 
> > > It might happen to work, if you're talking the same Intel-ish CPU type 
> > > on both ends ... but if it fails, don't call us. 
> > 
> > It might for 32-bit, but I'm pretty sure it's not going to for 64-bit 
> > because Windows is LLP64 and Linux is LP64, so sizeof(long) differs. See 
> > http://en.wikipedia.org/wiki/64-bit_computing . 
> > 
> > (Yet another area where Windows is annoyingly and pointlessly different, 
> > like use of UTF16 instead of UTF-8, though at least there they have the 
> > excuse of doing it first.) 
> > 
> > Just use a Linux box or a virtual machine to start a copy of the 
> > database, then pg_dump -Fc it and pg_restore to a new instance on the 
> > Windows box. 
>
> I would also worry about collation differences between Linux and 
> Windows.  We have seen index problems with OS upgrades causing 
> mismatches, so I assume Windows and Linux might have even larger 
> mismatches.   We have discussed a way to test for mismatches but have 
> no solution yet. 


Good point. In fact, the encoding names on Windows are different, as is the set of available encodings. That'd probably scuttle any attempt to use a *nix DB on Windows at least if it wasn't utf-8.
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