Re: [PATCH 10/16] Introduce the concept that wal has a 'origin' node

On 12-06-18 11:50 AM, Andres Freund wrote:
> Hi Simon,

> I think we need to agree on the parameter name. It currently is
> 'multimaster_node_id'. In the discussion with Steve we got to
> "replication_node_id". I don't particularly like either.
>
> Other suggestions?
>
Other things that come to mind (for naming this parameter in the 
postgresql.conf)

node_id
origin_node_id
local_node_id
> I wished we had some flag bits available before as well. I find 256 nodes a
> pretty low value to start with though, 4096 sounds better though, so I would
> be happy with 4 flag bits. I think for cascading setups and such you want to
> add node ids for every node, not only masters...
>
> Any opinions from others on this?
>

256 sounds a bit low to me as well.  Sometimes the use case of a retail 
chain comes up where people want each store to have a postgresql 
instance and replicate back to a central office.  I can think of many 
chains with more than 256 stores.



> Thanks,
>
> Andres