On Wed, Jan 21, 2009 at 5:15 AM, Gunaranjan Chandraraju <chandrar...@apple.com> wrote: > Hi All > We are considering SOLR for a large database of XMLs. I have some newbie > questions - if there is a place I can go read about them do let me know and > I will go read up :) > > 1. Currently we are able to pull the XMLs from a file systems using > FileDataSource. The DIH is convenient since I can map my XML fields using > the XPathProcessor. This works for an initial load. However after the > initial load, we would like to 'post' changed xmls to SOLR whenever the XML > is updated in a separate system. I know we can post xmls with 'add' however > I was not sure how to do this and maintain the DIH mapping I use in > data-config.xml? I don't want to save the file to the disk and then call > the DIH - would prefer to directly post it. Do I need to use solrj for > this?
What is the source of your new data? is it a DB? > > 2. If my solr schema.xml changes then do I HAVE to reindex all the old > documents? Suppose in future we have newer XML documents that contain a new > additional xml field. The old documents that are already indexed don't > have this field and (so) I don't need search on them with this field. > However the new ones need to be search-able on this new field. Can I > just add this new field to the SOLR schema, restart the servers just post > the new new documents or do I need to reindex everything? > > 3. Can I backup the index directory. So that in case of a disk crash - I > can restore this directory and bring solr up. I realize that any documents > indexed after this backup would be lost - I can however keep track of these > outside and simply re-index documents 'newer' than that backup date. This > question is really important to me in the context of using a Master Server > with replicated index. I would like to run this backup for the 'Master'. the snapshot script is can be used to take backups on commit. > > 4. In general what happens when the solr application is bounced? Is the > index affected (anything maintained in memory)? > > Regards > Guna > -- --Noble Paul
