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Re: Strategy for moving a large DB to another machine with least possible down-time

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On 09/21/2014 06:50 AM, Andreas Joseph Krogh wrote:
På søndag 21. september 2014 kl. 15:48:00, skrev Adrian Klaver
<adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>:

    On 09/21/2014 05:44 AM, Andreas Joseph Krogh wrote:
     > På søndag 21. september 2014 kl. 13:51:00, skrev Bill Moran
     > <wmoran@xxxxxxxxxxxxxxxxx <mailto:wmoran@xxxxxxxxxxxxxxxxx>>:
     >

     >
     > I see this limitation in Slyny:
     > http://slony.info/documentation/2.2/limitations.html
     >
     > Slony-I does not automatically replicate
     >
     >   *
     >
     >     Changes to large objects (BLOBS)
     >
     >   *
     >
     >     Changes made by DDL commands
     >
     >   *
     >
     >     Changes to users and roles
     >
     > Not being able to replicate BLOBS is a show-stopper for me as we have
     > lots of them.

    Well I would say it depends on where you are storing the binary data, in
    large objects or in a bytea column?  If you are using bytea columns then
    you would be okay. If it is large objects then you have a problem.

Large-objects, not BYTEA, as they allow for much more efficient
streaming (require less memory).


Here are some other suggestions from the project, though they are cluster wide(including PITR):

http://www.postgresql.org/docs/9.3/static/backup-file.html


--
*Andreas Joseph Krogh*
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andreas@xxxxxxxxxx <mailto:andreas@xxxxxxxxxx>
www.visena.com <https://www.visena.com>
<https://www.visena.com>


--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx


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