2008/10/22 martin <mpeacock at mater.ie>: > I've seen the various FAQs on the website saying there isn't metadata or > caching going on but then I can't get my head around how AFR knows what to > do when a brick goes offline and subsequently returns. There must be some > record of what changes were made. Is this on disk or in memory? AFR uses a database like journal to keep track of changes. When a node comes back up, there will be a record on other nodes to say *some* changes are pending on the node that was down. AFR then simply copies the entire file and/or creates files on the node that came back up. Vikas Gorur -- Engineer - Z Research http://gluster.org/
