On 14/10/10 00:18, Joshua D. Drake wrote: > On Wed, 2010-10-13 at 11:40 -0400, Geoffrey Myers wrote: >> On 10/13/2010 11:30 AM, zhong ming wu wrote: >>> On Wed, Oct 13, 2010 at 11:17 AM, Geoffrey Myers >>> <lists@xxxxxxxxxxxxxxxxxxxxx <mailto:lists@xxxxxxxxxxxxxxxxxxxxx>> wrote: >>> > Excuse the ignorance, but I see the following in the docs: >>> > >>> > 'In any case the hardware architecture must be the same â shipping from, >>> > say, a 32-bit to a 64-bit system will not work.' >>> >>> postgres only sees the OS. It does not care what hardware you got. So >>> you must use the same type of OS: both 32 bit or both 64 bit. >> >> As I expected, thus the document should possibly be rephrased to >> indicate it's the OS not the physical hardware that is the issue. > > No. Because PostgreSQL itself must also be the same architecture. No it doesn't. As Tom Lane pointed out, plenty plenty of 64-bit OSes on 64-bit hardware will run 32-bit binaries. Additionally, most 64-bit hardware will run 32-bit OSes with 32-bit binaries. So long as Pg has the same word sizes, endianness, etc, it won't care. This means that you can't log-ship from 32-bit Intel to 32-bit big-endian PPC and expect it to work, but you can log-ship from 32-bit Pg running on 64-bit Intel to 32-bit Pg running on 32-bit Intel and that'll be fine. -- Craig Ringer Tech-related writing: http://soapyfrogs.blogspot.com/ -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
