Release Notes

07 June 2022 Release

• Renames and relaunches Atlas Data Lake as Atlas Data Federation.

  Important

  The federated query engine service previously called Atlas Data Lake is now called Atlas Data Federation. To learn more about Atlas Data Federation, see Set Up and Query Data Federation.

31 May 2022 Release

• Improves performance and stability.
• Disables support for the MySQL dialect.

10 May 2022 Release

• Improves performance and stability.

19 April 2022 Release

• Improves performance and stability.

• Supports the following new MongoDB 5.2 aggregation operators:

  • $sortArray
  • $topN
  • $bottomN
  • $maxN
  • $firstN
  • $lastN
• Fixes a bug to allow you to use read preference for sharded clusters.

29 March 2022 Release

• Improves performance and stability.

15 March 2022 Release

• Improves performance and stability.
• Imposes an upper limit on maxRowGroupSize.

15 February 2022 Release

• Improves performance and stability.
• Renames the matchComments field to queryFilterComments . To learn more, see Retrieve Federated Database Instance Query History.

18 January 2022 Release

• Improves performance and stability.
• Adds matchComments field to query history. To learn more, see Retrieve Data Lake Query History.

28 December 2021 Release

• Improves performance and stability.
• Supports queries on collections prefixed with system, but doesn't support queries on collections prefixed with system..

07 December 2021 Release

• Improves performance and stability.
• Adds support for the $maxTimeMS option.

16 November 2021 Release

• Improves performance and stability.
• Allows connections to Data Lakes via private endpoints.
• Adds support for X.509 authorization.
• Adds support for empty field parameters with the $setField aggregation expression.
• Fixes an issue where commands returned zero exit codes on failure.
• Fixes an issue where documents with empty subdocuments written to Parquet contained empty parquet groups.
• Updates EstimateRowGroupSize to report UncompressedSize for documents stored in Parquet.
• Adjusts the minimum value for maxRowGroupSize when using $out to Parquet to 16MB.
• Removes support for using $out to write documents that contain duplicate fields to Parquet.
• Improves error messages for $out.

27 October 2021 Release

• Improves performance and stability.
• Includes X.509 users in the usersInfo command output.
• Improves SCRAM authentication performance.

05 October 2021 Release

• Improves performance and stability.
• Adds support for the authenticate command.
• Preserves binary subtypes in the parquet reader/writer.

14 September 2021 Release

• Provides various stability and performance improvements.
• Adds support for ap-south-1 region.
• Outputs customer query logs into multiple lines.
• Includes background field in $queryHistory output.
• Supports wildcard databases and collections for Atlas data store.

25 August 2021 Release

• Provides various stability improvements.
• Improves collStats and dbStats command performance and stability.
• Adds support for the $merge aggregation pipeline stage.
• Allows localField and foreignField with a more expressive $lookup aggregation pipeline stage syntax.
• Implements the $count accumulator.

03 August 2021 Release

• Improves performance.
• Improves error messaging.
• Adds computeTime and automaticRefreshInProgress fields to the collStats and dbStats command outputs.

12 July 2021 Release

• Supports dropping non-existent stores and databases from the storage configuration.
• Includes partitions.count in collStats command output.

23 June 2021 Release

• Allows downloading Data Federation query logs from the UI and API.
• Removes restriction on large collection namespaces.
• Adds option to bypass cache for collStats and dbStats to fetch the most recent statistics.
• Supports serverStatus command.

8 June 2021 Release

• Improves stability and performance.
• Supports public S3 data stores with the public configuration flag.
• Supports Zstandard compression when federating queries to Atlas clusters.
• Adds db field to dbStats result.

11 May 2021 Release

• Supports selecting read preference, read tags, and max staleness through the storage configuration for Atlas Cluster stores.
• Rejects commands sent with a Versioned API set.
• Enables the count parameter in the Data Lake $collStats aggregation stage.
• No longer permits $collStats in $facet sub-pipelines.
• Enforces maximum document size for $facet after processing each item.
• Improves performance for $match stages.
• Improves error messaging.

21 April 2021 Release

• Improves stability and performance.
• Includes improved support for Parquet.
• Supports M0, M2, & M5 Atlas clusters as data sources.
• Adds regex pattern matching option for wildcard collections from Atlas Clusters.
• Includes updated error messages for query execution limit.

30 March 2021 Release

• Generates storage configuration automatically for the first time after user authentication.
• Returns connection ID through the hello command.
• Supports $geoNear on Atlas Data Lake collections that span multiple Atlas clusters.
• Includes various performance improvements.
• Includes improved error messages for terminated queries.

09 March 2021 Release

• Includes new onboarding and storage configuration interface.
• Improved SQL schema error message.
• Support query pushdown to collections comprised of multiple Atlas collections.
• Improves stability and performance.

16 February 2021 Release

• Adds SQL schema generation for wildcard collections.
• Fixes stability and performance issues.

26 January 2021 Release

• Adds a new $sql formatVersion to reduce the data size of the result set.
• Improves performance of $lookup.
• Adds "verbosity": "queryPlannerExtended" support to the explain command to filter out non-matching partitions.
• Adds support for $$NOW.
• Reports Atlas Data Lake as MongoDB version 4.4 to tools.

5 January 2021 Release

• Adds support for the background option on the $out to Atlas aggregation stage.
• Includes stability and performance improvements.

16 December 2020 Release

• Adds {background: true} option, which allows queries to run in the background for $out to S3 stage.
• Introduces $queryHistory aggregation stage to view past queries.
• Includes various performance and stability improvements.

24 November 2020 Release

• Supports Parquet, CSV, and TSV formats for $out to S3.
• Adds a rolling limit for cursors.
• Improves error messages for commands that cannot be parsed.

03 November 2020 Release

• Supports the $geoNear and $graphLookup aggregation pipeline stages in queries on federated database instance collections that reference a single Atlas collection.
• Updates summary information in explain output.

13 October 2020 Release

• Supports defaultFormat for files in publicly accessible URLs in HTTP stores.
• Limits the number of simultaneous queries to 30 per federated database instance.
• Supports bzip2 compression format.
• Supports comment option for the aggregate command.
• Includes various performance and stability improvements.

22 September 2020 Release

• Supports killOp command for terminating a long-running query.
• Adds configuration for maximum number of wildcard collections for S3 federated database instance stores.

01 September 2020 Release

• Supports HTTP URLs as a data source.
• Supports AWS S3 Intelligent Tiering and Standard-Infrequent Access storage classes.
• Supports $unionWith aggregation stage.
• Restricts federated database instance connection string authentication to one user at a time.
• Includes general performance and stability improvements.

18 August 2020 Release

• Improves $out to S3 write performance.
• Includes general performance and stability improvements.

13 August 2020 Release

• Adds correlationID to the $currentOp output.
• Includes general performance and stability improvements.

28 July 2020 Release

• Relaxes $out S3 region requirement.
• Includes improved storage configuration error messages.
• Includes general performance and stability improvements.

14 July 2020 Release

• Supports $collStats aggregation pipeline stage.
• Includes performance optimizations for ORC files.
• Includes general performance and stability improvements.

07 July 2020 Release

• Adds support for the skip and limit fields to the count() command.

16 June 2020 Release

• Adds storageValidateConfig command to validate your federated database instance storage configuration.
• Includes bug fixes and performance improvements.

02 June 2020 Release

• Includes general performance and stability improvements.

26 May 2020 Release

• Adds support for Atlas Clusters as a data source.
• Improves performance for the $lookup aggregation pipeline stage.
• Adds support for evaluating string $convert expressions in the filename for $out to S3.
• Updates Parquet support for MAP types.
• Improves error messaging for $out to S3.
• Adds a command to generate a storage configuration.

12 May 2020 Release

• Automates storage configuration generation for newly created federated database instances.
• Allows write partitioning-aware data to S3 using the $out in Data Federation.

05 May 2020 Release

• Generates Storage Configs when Atlas creates a federated database instance.
• Adds support for $out to S3.
• Updates support for Apache Parquet LIST element.
• Upgrades wire protocol support to 4.2 from 3.6.
• Adds support for verbosity in the explain plan.

26 April 2020 Release

• Fixes stability issues.

14 April 2020 Release

• Improves performance.
• Supports the $currentOp stage so that you can monitor query progress on long-running queries.
• Updates the isodate attribute to accept additional formats.
• Refreshes the metadata catalog when you use Storage Configuration commands.

26 March 2020 Release

• Includes various performance and stability improvements.
• Supports filename field references for $out.
• Supports $toString in $out to S3.

09 March 2020 Release

• Supports optionally granting federated database instance write access to S3 buckets, enabling use of $out semantics to write directly to those buckets.
• Adds incremental store, database, collection, and view commands for storage configuration management.
• Limits collections returned for wildcard collections to 1,000.
• Updates the storage configuration format.

11 February 2020 Release

• Supports cross-database $lookup queries.
• Supports lowercase and uppercase file extensions.
• Template segments now support dot-separated attribute names that correspond to nested fields.

21 January 2020 Release

• Allows the defaultFormat to be specified without a leading dot.
• Supports filtering based on stripes for files in ORC format.
• Allows query attributes to be extracted after the first stage.

10 December 2019 Release

• Includes several performance and stability improvements.

• Supports partition definition for the following:

  • epoch_secs, which is seconds since the Unix Epoch
  • epoch_millis, which is milliseconds since the Unix Epoch
  • UUID, which is binary subtype 4

11 November 2019 Release

• Includes several performance and stability improvements.
• Adds support for reading Apache ORC files.

29 October 2019 Release

• Supports filtering partitions by Parquet file row group statistics.
• Supports ObjectIds in the path when specifying partition databases.<database>.<collection>.[n].definition.

08 October 2019 Release

• Returns an error if a query produces a document larger than 16 MiB.
• The $indexStats stage now produces an empty list of indexes instead of an error.
• Supports $out to S3 storage format in JSON.
• $match now implicitly treats all terms as conjunctions.
• No longer parses empty files.
• Fixes an issue that caused the {$match: {$expr: {$and: []}}} expression to terminate the connection.

17 September 2019 Release

• Allows nested fields in partition definitions.
• No longer enumerates directories on S3 when a single subdirectory containing all the partitions matching the query is identified.
• Fixes an issue where the new storage configuration did not appear on the issuing connection after running setStorageConfig.

21 August 2019 Release

• Adds support for the getLastError database command.
• Fixes a bug with how union types are handled in Avro.
• Supports $out aggregation pipeline stage to S3.
• listIndexes now always returns an empty list.
• Translates dot-delimited CSV and TSV keys into subdocuments.
• Storage configuration error message now includes a link to the documentation.
• Supports the XLSX file format.
• Includes the correlation ID in query execution error messages.
• Returns an error to the client when the cursor storage limit is reached.
• Returns an error to the client on the last getMore if the cursor storage limit is exceeded.

30 July 2019

• Supports listCommands. For example: db.runCommand({"listCommands": 1})
• Includes partition size information in the output of explain().

08 July 2019

• Returns the first batch of cursor results more quickly.
• Improves performance of $lookup when combined with $unwind.
• Automatically supports SCRAM-SHA-1 credentials without requiring drivers to specify this authentication mechanism.
• Provides a descriptive error message when the file format is unknown.
• Provides additional validation on setStorageConfig.

18 June 2019

Initial public beta release of Set Up and Query Data Federation.