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From: Thomas Harold <[email protected]>
To: Ben Chobot <[email protected]>
Cc: pgsql-general General <[email protected]>
Subject: Re: PG replication across DataCenters (section 25 in the manual)
Date: Mon, 09 Dec 2013 11:39:20 -0500
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On 12/9/2013 11:24 AM, Ben Chobot wrote:
>
> Out of curiosity what did you find unclear about
> http://www.postgresql.org/docs/9.3/static/different-replication-solutions.html?

Perhaps the "Per-table granularity" line in the matrix (Table 25-1) 
might be better written as:

"Synchronization Granularity"

Columns 1-3 and 5 could say "Entire Cluster".  Column 4 might say 
"Selected tables (Slony)", and I'm not sure off-hand what granularity #6 
(Bucardo) is capable of.  Column #7 might just say "Varies".

For someone not familiar with what exactly WAL files are, it's not clear 
that solution #3 is an all-or-nothing approaches at the cluster level. 
Now that I've refreshed my memory on how WAL files work (and at what 
level in the pgsql cluster), I understand why #3 works the way it does.


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