On 2015-08-19 09:41:32 -0400, Tom Lane wrote:
> In fact, they'd still need to use DNS balancing for Postgres,
> because not everything connects with libpq (think JDBC for instance).
It already does support this though.
https://jdbc.postgresql.org/documentation/head/connect.html :
> Connection Fail-over
>
> To support simple connection fail-over it is possible to define multiple
> endpoints (host and port pairs) in the connection url separated by
> commas. The driver will try to once connect to each of them in order
> until the connection succeeds. If none succeed, a normal connection
> exception is thrown.
>
> The syntax for the connection url is:
>
> jdbc:postgresql://host1:port1,host2:port2/database
> So I think we ought to reject this proposal, full stop. I see no
> reason to re-invent this wheel, and there are good reasons not to.
I don't really buy this argument. Allowing to connect to several
endpoints isn't exactly "new tech" either. A lot of database connectors
do support something very close to the above pgjdbc feature.
Greetings,
Andres Freund
