How do I write in 3.x format to an upgradeded index using Lucene 4.10

Hi Guys We have several hundred thousand indexes that have been written in Lucene 3.x format. I am trying to migrate to Lucene 4.10 without the need to reindex and  the process should be transparent to our customers. Reindexing all our legacy data is not an option. The predominant analyzer we c

Re: How do I write in 3.x format to an upgradeded index using Lucene 4.10

> If we take our old 3.x index and apply IndexUpgrader to it, we end up with a > 4.10 index. > There are several lucene 4.x files created in the index directory and no > errors are thrown. > However, it appears that the index data is still in the 3.x format, namely it > remains: > "thanks", "com

Re: How do I write in 3.x format to an upgradeded index using Lucene 4.10

Hi Tx Thank you for the detailed response, that makes a lot of sense. I feel we may have to freeze some old analyzer code as we have indexes that were written with Lucene 2.3 analyzers and that is no longer supported. I'll need to do some experimentation to see how we go. Further reading has sho