Server

• [Backup] Added retention policy for backups
• [Backup] Added restore from RavenDB cloud
• [Backup] Fixed allowed backups to Amazon S3
• [Cluster] Stability improvements
• [Cluster] Added option to remove specific change vectors from a database (UpdateUnusedDatabasesOperation)
• [Configuration] Added 'Updates.BackgroundChecks.Disable configuration option
• [Import] Fixed import of .ravendbdump file with existing auto map-reduce index
• [Licensing] Fixes cores reassign when moving from upgrading to higher license
• [Licensing] Fixed loading of null cert
• [Patching] Fixed patching of documents created by cluster transactions
• [PAL] Fixed problem with copying librvnpal binary on server startup
• [Subscriptions] Fixed subscriptions on deleted revisions
• Added Refresh feature that will touch a document according to date in @refresh metadata
• Updated .NET Core to version 2.2.6

Client

• [Connection Strings] Added RaftCommandIndex field to PutConnectionStringResult and RemoveConnectionStringResult. ETag field was marked as obsolete.
• [Conventions] Added CustomizeJsonDeserializer convention
• [Identities] Added dedicated operations for working with identities (NextIdentityForOperation, SeedIdentityForOperation
• [Revisions] Added a way to manually force revision creation session.Advanced.Revisions.ForceRevisionCreationFor

Server

• [Backup] Support for Google Buckets as backup target
• [Backup] Added option to define a backup operation across all databases
• [Certificates] Export certificate will work for Operators
• [Compare Exchange] Added ability to store null as compare exchange value
• [Compare Exchange] Fixed import of compare exchange values when importing from 4.1 .ravendump file
• [Cluster] Stability improvements
• [Counters] Improved import performance and possible memory leaks during the process
• [CSV] Fixed missing Raven-Clr-Type in Export/Import CSV
• [Debugging] Added /cluster/topology to the debug package info
• [Debugging] Capturing stack traces on Linux
• [Encryption] Improved memory usage by background operations in encrypted databases]]
• [ETL] Added ETL.MaxBatchSizeInMb option to limit batch size by amount of sent data (default: 64MB)
• [Indexing] Fixed cleanup on idle index
• [Indexing] Recreating index writer on EarlyOutOfMemoryException
• [Indexing] Added support for Aggregate, Join, GroupJoin, LongCount, ThenBy, ThenByDescending, TakeWhile, SkipWhile in the index definition
• [Indexing] Ignoring ObjectDisposedException on index deletion and not reporting it to the Studio
• [Indexing] Added configuration option Indexing.Encrypted.TransactionSizeLimitInMb (default: 64MB)
• [Indexing] Better handling of methods in additional sources
• [Logging] Added Logs.Compress option to compress log files (default: false)
• [Logging] Added Logs.RetentionSizeInMb option to control logs retention based on size (default: disabled)
• [Patching] Fixed memory leak
• [Patching] Patch will preserve the order of properties
• [Querying] Added support for sorting by Id as a alphanumeric value
• [Replication] Fixed conflict creation of HiLo documents
• [Replication] Fixed NRE when replicating HiLO document tombstone
• [Replication] Added Replication.RetryMaxTimeoutInSec allowing to retry on replication failure (default: 300 sec)
• [Subscriptions] Fixed possible endless loop when testing a subscription
• [Subscriptions] Fixed include usage in subscriptions test
• [Subscriptions] After restore from export file subscriptions will have different internal identifier
• [Suggestions] Fixed index writer recreation after indexing batch
• [Setup Wizard] Fixed port issue when setting up cluster
• [SNMP] Added SNMP alert for CPU credits
• [Voron] Fixed error handling in async transactions
• [Voron] Recognize SMB2 shares as not valid for dir sync
• Fixed possible race condition during server initialization when using HTTPS
• Fixed RavenDB 4.2 incompatibility on Windows 7
• Enhanced performance handling on burstable instances by scaling down background operations
• Fixed potential server update problem if libsodium or librvnpal libraries were updated

Experimental

• [Graph API] Support for alias in edge SELECT clauses

Tools

• [Voron Recovery] Added support for recovering encrypted databases

Client

• [Backup] Added option to pass node to RestoreBackupOperation
• [Backup] Added RemoteFolderName to Glacier backup setting
• [Configuration] Preventing multiple calls to configuration/client endpoint
• [Cluster] Improving client interaction with the cluster
• [Cluster] Added SetDatabaseDynamicDistributionOperation operation
• [Memory] Fixed cached memory usage
• [Projections] Fixed calculations on integers
• [RQL] Marking 'limit' and 'offset' as reserved keywords
• [Querying] Fixed custom converters usage when serializing query parameters
• [Querying] Added overload for Search method allowing to provide a collection of search terms
• [Session] Fixed changes detection of session.Advanced.WhatChanged()
• [Session] Fixed session clearing
• [Smuggler] Better error handling on Smuggler.ExportAsync is provided path isn't valid or accessible
• [Streaming] Added support for StreamQueryStatistics to async streaming API
• Prevented accepting tasks configurations when creating a database or updating database record
• Fixed DatabaseDoesNotExistException on first operation after creating database

Studio

• [Backup] Fixed Backup local destination folder autocomplete
• [Licensing] Added Renew option if license is expired
• [Cluster] Fixed displayed version after server update on Cluster view
• [Cluster] Fixed Cluster view constantly showing Voting in Progress
• [Replication Graph] Displaying replication errors

Features

• [Backups] support for encryption
• [Replication] Pull Replication. Blog & Documentation
• [Revisions] Revert revisions. Blog & Documentation

Out of Experimental

• [Counters] Distributed Counters support. Documentation
• [Cluster Transactions] Cluster-Wide Transaction support. Documentation
• [Indexing] JavaScript indexes support. Documentation

Experimental

• [Graph API] Graph Queries support. Blog

Other

• [Indexing] added dynamic fields (CreateField) to the Terms view
• [Indexing] added NGramAnalyzer along with Indexing.NGram.MinGram and Indexing.NGram.MaxGram configuration options
• [JavaScript] performance optimizations
• [Studio] introduced Light and Blue themes
• [Studio] added the ability to Diff the Revisions. Blog
• [Studio] added Identities view
• [Studio] added StackTraces view
• [Studio] added Running Queries view and the ability to kill them
• [Querying] added support for Custom Sorters
• [RQL] added support for Limit and Offset

Client API

• [Events] added conversion events to the DocumentStore
• [Indexing] AbstractIndexCreationTask allows to set index configuration
• [Subscriptions] support for strongly-typed subscription includes
• [Querying] added ToArrayAsync support