Tue Dec 21 23:45:10 PST 2010
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Hi all,
We are using slonyI 2.0.5 to build our master/slave postgres HA solution for
our project. So far slonyI works fine except for a strange getlocalnodeid
issue. Could somebody please help to figure me out?
The scenario is, we have host A as master (define as node 1 in slonic), host
B (node 2) as slave at beginning. The data was replicated to host B from A
by slony.
Then we stop postgres on host A, and in host B run failover command and drop
node A from cluster. Thus the db service was switch to host B.
Establish a connection to host B via psql, and execute "select
_cluster.getlocalnodeid('_cluster')", it returns 2. Keep this connection for
a while.
So far everything is good.
Stop all slon process on host A and B.
Then start the postgres server on host A, and in both host A and host B,
execute "drop schema _cluster cascade" to clean all the cluster information.
Build the cluster again, this time host B as master (node 1), host A as
slave (node 2), and start the slon in both nodes.
Setup a new connection to host B and execute same "select
_cluster.getlocalnodeid('_cluster')", it returns 1.
But in the old connection we kept before, this command still return 2. At
the same time, in old connection, the update/insert/delete operation can not
be synchronized to host A.
It's strange that the cluster is rebuilt and slon is restarted but why only
old connection the localnodeid is still 2 and can not be resynchronized?
Anyone idea?
Thanks very much for your time!
Br,
Zhidong
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