MongoDB Documentation, Release 3.0.4 Indexes See also: Query Enhancements See also: Distributions and Supported Versions See also: • Background index builds will no longer automatically interrupt if dropDatabase , drop , dropIndexes operations occur for the database or collection affected by the index builds. The dropDatabase , drop , and dropIndexes commands will still fail with the error message a background operation is currently running , as in 2.6. • If you specify multiple indexes to the createIndexes command, – the command only scans the collection once, and – if at least one index is to be built in the foreground, the operation will build all the specified indexes in the foreground. • For sharded collections, indexes can now cover queries (page 66) that execute against the mongos if the index includes the shard key. Indexes (page 808) in Compatibility Changes in MongoDB 3.0 (page 804) MongoDB 3.0 includes the following query enhancements: 2d Indexes and Geospatial Near Queries (page 808) Most non-Enterprise MongoDB distributions now include support for TLS/SSL. Previously, only MongoDB Enter- prise distributions came with TLS/SSL support included; for non-Enterprise distributions, you had to build MongoDB locally with the --ssl flag (i.e. scons --ssl ). 32-bit MongoDB builds are available for testing, but are not for production use. 32-bit MongoDB builds do not include the WiredTiger storage engine. MongoDB builds for Solaris do not support the WiredTiger storage engine. MongoDB builds are available for Windows Server 2003 and Windows Vista (as “64-bit Legacy”), but the minimum officially supported Windows version is Windows Server 2008. Platform Support (page 809), What are the limitations of 32-bit versions of MongoDB? (page 746) 12.1. Current Stable Release 803 • For geospatial queries, adds support for “big” polygons for $geoIntersects and $geoWithin queries. “Big” polygons are single-ringed GeoJSON polygons with areas greater than that of a single hemisphere. See $geometry , $geoIntersects , and $geoWithin for details. • For aggregate() , adds a new $dateToString operator to facilitate converting a date to a formatted string. • Adds the $eq query operator to query for equality conditions.