Mon Feb 4 12:56:25 PST 2008
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Update of /home/cvsd/slony1/slony1-engine/doc/adminguide In directory main.slony.info:/tmp/cvs-serv22520 Modified Files: defineset.sgml Log Message: Comment on another reason (CONNECTION TIMEOUT) to separate a large replication set into multiple pieces. Index: defineset.sgml =================================================================== RCS file: /home/cvsd/slony1/slony1-engine/doc/adminguide/defineset.sgml,v retrieving revision 1.28 retrieving revision 1.29 diff -C2 -d -r1.28 -r1.29 *** defineset.sgml 11 Jun 2007 16:02:50 -0000 1.28 --- defineset.sgml 4 Feb 2008 20:56:22 -0000 1.29 *************** *** 121,124 **** --- 121,134 ---- the degree of the <quote>injury</quote> to performance.</para> + <para> Another issue comes up particularly frequently when replicating + across a WAN; sometimes the network connection is a little bit + unstable, such that there is a risk that a connection held open for + several hours will lead to <command>CONNECTION TIMEOUT.</command> If + that happens when 95% done copying a 50-table replication set + consisting of 250GB of data, that could ruin your whole day. If the + tables were, instead, associated with separate replication sets, that + failure at the 95% point might only interrupt, temporarily, the + copying of <emphasis>one</emphasis> of those tables. </para> + <para> These <quote>negative effects</quote> tend to emerge when the database being subscribed to is many gigabytes in size and where it
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