http://ayende.comAyende @ RahienCopyright (C) Ayende Rahien 2004 - 2021 (c) 202660We had some guys from Coherence (recently bought by Oracle) come in to give us a demo. They explained how their failover and recovery works - it's pretty clever and I was definitely impressed! Essentially there is no single node which is responsible for managing the other nodes, each node has a backup and other nodes "vote" to determine whether they think a particular node is active or not. If a node's backup goes down, it chooses another node to be its backup and pushes its data onto that node. Vice versa, the backup takes over as the master node and picks a new backup. All transparently http://ayende.com/3594/not-so-impressive#comment2http://ayende.com/3594/not-so-impressive#comment2Thu, 18 Sep 2008 09:57:16 GMTI am just starting to look at building a distributed grid for processing millions of documents (.doc, .xls, etc). The things you mention are some of the things I have been pondering. Do you, or any of your readers, have any good guidance/references on this stuff? Or maybe some upcoming posts to look forward too? A couple of things of interest I have come across for those interested are Digipede (http://www.digipede.net/) and Alchemi (http://www.alchemi.net/). BTW - your recent posts on Multi Tenancy were excellent. Much appreciated. http://ayende.com/3594/not-so-impressive#comment1http://ayende.com/3594/not-so-impressive#comment1Tue, 16 Sep 2008 05:59:42 GMT