[nl]

I have Solr mostly working on AppEngine.

Obviously (for those of you who know the Solr codebase), there are some pretty extreme hacks to get around the lack of file system access, but nothing that couldn't be cleaned up.

I was a little surprised about the lack of interest in it when I emailed the solr-dev list.

[MarcusL]

The Compass GAE walkthrough (http://www.kimchy.org/searchable-google-appengine-with-compa...) was also able to get a rudimentary Lucene indexer up and running. However many people eventually ran into problems with App Engine's 30-second request processing limit. For your Solr instance did you utilize the Task Queue or have to do anything special to work around the 30-second limitation?

[nl]

I'm not doing anything with Task Queue at the moment. I'm using the Lucene implementation from Compass (and I've used it elsewhere too), so I am familiar with it.

From memory, I think Compass had a unique problem with the 30 second limit because it would try and re-sync the non-Lucene data with the Lucene indexes (I can't remember what the trigger was for this).

I had quite a lot of issues with Compass-GAE - my impression was that it wasn't really production ready. However, I did notice that Google is using it for their ThoughSite example app, so maybe it has improved.