Elasticsearch is open source, so reading (and using and modifying) the algorithms is possible. There is also a lot of introductory material available online, and I recommend "Elasticsearch - The definitive guide" if you want paperwork.
If you create an index, ES creates shards for this index (by default 5), and different nodes receive one of such shards, so indexing and search is automatically distributed over the participating nodes. ES keeps a map of shards in the cluster state, so every node is able to route a query or an index command. You don't need to manually route queries to shards. You can force ES to put all data on 3rd node, and in that case, you already know what you want... there is no surprise. ES follows the principle of least surprise. Jörg On Mon, Mar 30, 2015 at 5:07 AM, MrBu <metin.aky...@gmail.com> wrote: > Other than Lucene's own research papers, what are the research papers or > special algorithms that is being used by Elastic? I couldn't find a list it > in the documents. > > Are the special algorithms used (and which ones are used in where) for > example what is the algorithm used in in load distribution or just round > robin algorithm? > > I really want to get in deep with Elastic :) > > This way I could have more knowledge. Example, suppose there are 20 nodes, > and surprisingly (and somehow) only the data in 3rd node is being searched > all the time. (say these are popular documents somehow gathered only in > this node) so Elastic weights this load into all cluster by dividing this > data to other nodes ? Or will it always use only 3rd node? There are tons > of questions in my mind, waiting to be answered. Only possible way to read > the algorithms . It would help me a lot. > > Thanks > > -- > 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 elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/75907f69-38be-49fb-bf69-2f5dbf83cc45%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/75907f69-38be-49fb-bf69-2f5dbf83cc45%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAKdsXoFsiXK72E8qFOeWpHYuPrC8eNZZz%3Dsn5OE-O2fw4HWV8w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
