http://www.couchbase.com/issues This file is an XML representation of an issue en-us 5.2.4 845 26-12-2012 http://www.couchbase.com/issues/browse/MB-4564 Couchbase Server A recent bug brought up a concern around the process of deleting the on-disk data files when a node is failed over or removed from the cluster. <br/> <br/> I think it would be a better approach to preserve this data in the event that it is needed. Perhaps moving them out of the way and messaging to the user that they can clean them up manually when needed. MB-4564

Don't delete database files when node leaves cluster.

Improvement Blocker Resolved Fixed Public Aliaksey Artamonau Perry Krug 1.8.1-release-notes customer Wed, 21 Dec 2011 14:02:53 -0600 Sun, 13 May 2012 18:32:08 -0500 Mon, 9 Apr 2012 21:12:13 -0500 1.7.2 1.8.1 ns_server 0 2 Perry, you want files preserved for eternity or we can/should get rid of them when node is re-initialized or joins some cluster ? I think the join cluster could be a fine situation to clean them up. What do you mean by re-initialized? This is really only needed as a fail-safe situation in case we need to recover the data from the node that was failed over or removed. that&#39;s when/if node is initialized via setup wizard as standalone cluster Oh, yes...then that&#39;s a good time as well too. My only concern would be that the current code path re-initializes the node when it gets failed over or removed so we&#39;d have to change that behavior. Aliaksey still needs final requirements on how this needs to behave. Please document decision here. Aliaksey took this.<br/> <br/> Decision was to don&#39;t touch files when node is ejected/failed over. But rid of them either in the middle of wizard or when rebalance back in starts.<br/> Could we also add a task to notify the user when the files are about to be deleted (either in the wizard or when adding back / rebalancing)? how you want user to be notifed? We can use user-visible log message or we can have alert-like thing. I&#39;d specifically like something that makes the user confirm that they understand that proceeding with whatever action will result in the deleting of files they may want to save. A log message after the fact doesn&#39;t give them the ability to recover that data. alk predicts this evening ETA <a href="http://review.couchbase.org/14628">http://review.couchbase.org/14628</a> Integrated in github-ns-server-2-0 #333 (See [<a href="http://qa.hq.northscale.net/job/github-ns-server-2-0/333/">http://qa.hq.northscale.net/job/github-ns-server-2-0/333/</a>])<br/> &nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.couchbase.com/issues/browse/MB-4564" title="Don&#39;t delete database files when node leaves cluster."><strike>MB-4564</strike></a> Don&#39;t delete database files when node leaves cluster. (Revision ac961c9839396f64ef6c0ef56e5f298095a0da63)<br/> <br/> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result = SUCCESS<br/> Aliaksey Kandratsenka : <br/> Files : <br/> * src/ns_memcached.erl<br/> * src/ns_cluster.erl<br/> * src/menelaus_web_buckets.erl<br/> * src/menelaus_web.erl<br/> * src/ns_storage_conf.erl<br/> * src/ns_rebalancer.erl<br/> Date of First Response Mon, 30 Jan 2012 16:34:01 -0600 Rank 5886 Time In Status