Hi, We have recently migrated our application from 'bare Lucene + Zoie for realtime search' to Elastic Search. Elastic search is awesome and next to scalability, it gives us lots of additional features. The one thing we really miss though is realtime search.
Search is the core of our application. All our data is stored in the index (primary data store). When a user adds a file or makes a change, their subsequent search must reflect that change. With Zoie, the data was indexed very quickly into a temporary Lucene memory index. Not having to write+read it on disk makes the documents available for search much faster than NRT Lucene. The memory index is flushed to disk asynchrounously from time to time, not impacting indexing or search performance. Zoie also allows you to wait for a specific 'version of the index' to be available for searching. That way we could make the user's thread wait until their data was indexed in memory, only pausing the thread of that user without having any performance impact for all the other users. Result: realtime search and insanely fast indexing. With Elastic Search we have to do a refresh to make data available for search. Lots of refreshes or the 1 second refresh interval will cause significant slower indexing speed. We don't know beforehand when our users will import documents or make lots of changes, so we cannot really increase the refresh interval when needed to make indexing faster. We know that 'get' is realtime and we make use of that as much as possible, but in lots of cases we really require a search to find the data. Our plan is to implement some mechanism in Elastic Search to get the same realtime search + fast indexing behavior that we had with Zoie. We need some pointers though on what would be the best place in Elastic Search to do something like this. After all it hooks into low level Elastic Search and Lucene stuff. I can imagine that 'realtime-search while indexing' is important for many other Elastic Search users too. What are the chances of something like this getting merged back into the main branch? I'm planning to be at the Friday drinks tomorrow in Amsterdam. Is there anyone attending with whom I could do some sparring with on this matter? Thanks, Nico -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/0ed50d5f-4ade-4d56-af06-6e2c26feff9b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
