I have a database with multiple small-sized capped collections (about 1MByte each) that I am using in tailable cursor mode. Is it possible to read and write simultaneosuly from different mongodb capped collections in this database (i.e. tail (and read) from collection B while writing to collection A). I read that mongodB locks the database on a write. Is this true?
Read and Write Simultaneosuly from Different mongodb capped collections in same database
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In MongoDb 2.6, locking is done on collection level. and in MongoDb 3.0, document level locking is done.
so it is possible to read from one collection and write to and other collection using cursor from MongoDb 2.6 onwards.
http://www.infoq.com/news/2014/04/MongoDB-2.6-Kelly-Stirman