I think everything you said is correct for static schemas, but a single core does not necessarily have a unique schema since you can have dynamic fields.
With dynamic fields, you can have multiple types of documents in the same index (core), and a multiple types of indexed fields specific to individual document types - all in the same core. Briggs Thompson On Mon, Jul 18, 2011 at 2:22 AM, pravesh <suyalprav...@yahoo.com> wrote: > >a single core is an index with same schema , is this wat core really is ? > > YES. A single core is a independent index with its own unique schema. You > go with a new core for cases where your schema/analysis/search requirements > are completely different from your existing core(s). > > >can a single core contain two separate indexes with different schema in it > ? > > NO (for same reason as explained above). > > >Is a shard refers to a collection of index in a single physical machine > >?can a single core be presented in different shards ? > > You can think of a Shard as a big index distributed across a cluster of > machines. So all shards belonging to a single core share same > schema/analysis/search requirements. You go with sharding when index is not > scalable on a single machine, or, when your index grows really big in size. > > > Thanx > Pravesh > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/difference-between-shard-and-core-in-solr-tp3178214p3178249.html > Sent from the Solr - User mailing list archive at Nabble.com. >
