[erlang-questions] Operating on remote replicas
Ulf Wiger (TN/EAB)
Fri Jul 20 02:03:21 CEST 2007
Joel Reymont wrote:
> Suppose I have a node with a bunch of tables and I point
> another node to it with extra_db_nodes. The new node will see
> the schema of the first node but will not have local replicas
> unless added with mnesia:add_table_copy/3.
> Still, I can read from and write to these remote tables as if
> they were local. Is this by design?
>From the User's Guide, chapter 1.2.1 (Features):
"Table locations are transparent to the programmer.
Programs address table names and the system itself
keeps track of table locations."
The most common way of dealing with extra_db_nodes
is to not give them local replicas, but if you want
to, you can, of course (and as far as I recall,
AXD 301 does it sometimes.) It's not necessary in
order to access the data, but does speed up read
access (but slows down write access due to increased
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