There is a very large amount of data and there will be a constant addition of more data. There will be hundreds of millions if not billions of items.
We have to be able to be able to be constantly indexing items but also allow for searching. Sadly there is no way to know the amount of searching that will be done, but was told to expected a fair amount. (I have no idea what "a fair amount" means either) I am not sure that only one shard will be adequate in this setup. The speed of the search results is the key here. There is also no way to test this prior to implementation. Is this enough information to be able to provide some guide lines? -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
