On Tue, 2008-06-24 at 09:53 +0200, Marc Grimme wrote: > Hello, > we are currently testing the specator mount option for giving nodes readonly > access to a gfs filesystem. > > One thing we found out is that any node having mounted the filesystem with > spectator mount option cannot do recovery when a node in the cluster fails. > That means we need at least 2 rw-nodes. It's clear when I keep in mind that > the node has no rw-access to the journal and therefor cannot do the journal > replay. But it is not mentioned anywhere. > > Could you please explain the ideas and other "unnormal" behaviors coming along > with the spectator mount-options. > > And are there any advantages from it except the "having no journal"? > Marc, Funny you should bring this up. We were just discussing a good use case for the spectator mode and the advantages of it. Dave and Chrissie are looking at putting together a document on it, maybe you can help? Some of items we are discussing: - Central central cluster nodes that provide quorum votes - Spectator nodes don't have quorum counts - DLM balancing such that all lock hosting is done on the central cluster nodes - No fencing required for spectator nodes Thanks Kevin -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
