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Date:      Tue, 15 Jan 2013 13:45:50 +0100
From:      "O. Hartmann" <ohartman@zedat.fu-berlin.de>
To:        Amitabh Kant <amitabhkant@gmail.com>
Cc:        "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: databases/postgresql: simple mirroring of a database or a whole server
Message-ID:  <50F54F7E.4020402@zedat.fu-berlin.de>
In-Reply-To: <CAPTAQBL_oDALAkdSeGywfkbjZ2t3Xb5mEcXVXkVctjwUuatBmQ@mail.gmail.com>
References:  <50F53548.9010004@zedat.fu-berlin.de> <CAPTAQBL_oDALAkdSeGywfkbjZ2t3Xb5mEcXVXkVctjwUuatBmQ@mail.gmail.com>

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On 01/15/13 13:14, Amitabh Kant wrote:
> On Tue, Jan 15, 2013 at 4:24 PM, O. Hartmann <ohartman@zedat.fu-berlin.=
de>wrote:
>=20
>> Hello list.
>>
>> First, please set me CC, i do not subscribe this list.
>>
>> I'd like to ask for a mirroring solution of an important databse on my=

>> installations across at least three boxes. The setup is as follows.
>>
>> Operating system is FreeBSD 10.0/amd and 9.1-STABLE/amd64. A top of th=
e
>> OS there is on all machines in question port
>> databases/postgresql92-server|client running.
>>
>> I have a database that needs to be synchronized/mirrored. A data
>> consistency in a narrow timeframe isn't necessary. The database in
>> question is a very important literature reference db which is maintain=
ed
>> via a web interface and this is done mostly from a private box at home=
,
>> which changes the local database set. This database is also used at th=
e
>> lab. Usually, I have to dump the db, send it via ssh/scp over the net =
to
>> the target machine and restore it - and this at least three times. Sin=
ce
>> network connectivity isn't available for some technical reasons when I=

>> maintain the local db at home, this task is a pain, if I forget to
>> dump/restore the database. The task maintaining the databases like tha=
t
>> isn't appreciable.
>>
>> So, I looked out for a mirroring solution. I came across SLONY I/II, b=
ut
>> I feel not very comfortable with the complicated setup. Although havin=
g
>> had a howto, it dind't work properly. So I'm looking for something mor=
e
>> simple.
>>
>> The data consistency within short timeframes isn't so important, so a
>> mission critical mirroring isn't necessary. But I would be feel better=

>> having something more "automatic" that is synchronizing more than two =
or
>> three machines automatically when network connectivity is available.
>>
>> Is there a solution - easy task - to handle such a scenario?
>>
>> Thanks in advance,
>> Oliver
>>
>>
> Since you are using postgresql 9.2, why don't you use the inbuilt
> replication that comes with it. You might be interested in this page
> http://www.postgresql.org/docs/9.2/static/high-availability.html .
>=20
> In case you face any difficulties, u can always head over to pgsql mail=
ing
> list. (pgsql-general@postgresql.org)
>=20
> Amitabh
>=20


Thank you very much for this hint!
I'm new to the 9.X series, so I didn't realize that there is something
new built-in.

Valuable hint.

Regards,
Oliver


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