Hi Mike, Thanks for the information! Peter
> -----Original Message----- > From: Michael McCandless [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 19, 2006 5:49 PM > To: java-user@lucene.apache.org > Subject: Re: NFS/iSCSI SAN with Lucene > > > > I did a search on the Lucene list archives, found a lot of > posts about > > the use of Lucene with NFS and how there are locking > issues, but don't > > see anybody coming to a real solution to this. > > We are trying to fix this. Many people seem to hit it. > > The current plan is to first decouple the Locking > implementation from the Directory implementation: > > http://issues.apache.org/jira/browse/LUCENE-305 > > and then create a Locking implementation that uses native OS > locks instead of the simple file-existence locks (used now) > that do not work with NFS. > > But the development is still in process and so it won't be > until a future Lucene release that this is fixed correctly. > > A very good workaround is to use or be inspired by the > approach that the Solr project: > > http://incubator.apache.org/solr/features.html > http://incubator.apache.org/solr/tutorial.html > > uses, described here: > > http://wiki.apache.org/solr/CollectionDistribution > > The gist is, your single Java process that has an IndexWriter > periodically snapshots the index at a known-safe time, and > then the multiple Searchers switch to the latest snapshot > once the snapshot is complete. > > Solr actually distributes copies of the index to each > Searcher's local storage, but you could probably modify this > approach so that, instead, the Searchers all share a single > copy off your SAN. > > Mike > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
