I would also suggest to use Solr5, as there are lots of new features. We are using 5.2.1 now, which is pretty stable.
2015-10-23 16:32 GMT-07:00 Shawn Heisey <apa...@elyograg.org>: > On 10/23/2015 12:22 PM, Robert Hume wrote: > > I'm investigating installing a new Solr deployment to be able to search > > about two million documents (mostly HTML and PDF). > > > > QUESTIONS: > > > > A. Should I use Solr 4.x or 5.x? My concerns are mostly to do with > > support. Is 5.x too new to be able to get good answers and advice from > the > > community? Or should I stick with the latest 4.x release? > > I think the books were covered pretty well by Alexandre, so I won't go > into that. > > I agree that you should use 5.x. Once you get a particular major > version deployed, upgrading to a new major version can be challenging. > Upgrading to new minor versions is usually pretty easy, so go with the > latest version. > > Additionally, it is highly unlikely that you will see any bug fixes for > 4.x. If a serious enough bug is found, a new 4.10.x version may get > released, but it will have to be a HUGE bug, without a workaround. I > can guarantee that you won't see any performance improvements in 4.x. > There will never be a 4.11.0 version. 4.x development is effectively > dead. Most effort is focused on 5.x, and some of it is focused on 6.0. > > There is always the possibility that 4.x might be more stable than 5.3.1 > ... but this is a very slim possibility. A lot of effort is spent > trying to make sure that all releases are as stable as possible, and > frequently, especially when running SolrCloud, the newest version will > be more stable than anything in the previous major version. Stability > is likely to improve with each new minor release. > > If 5.x were still at the 5.0 or 5.1 version, this might be different > advice, but there have been four minor releases in the 5.x series. Most > of the bugs that are inevitable in any x.0 release have been fixed. > > Thanks, > Shawn > >
