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1.5.14 September 24th 2023

Akka.NET v1.5.14 is a maintenance release with several bug fixes.

If you want to see the full set of changes made in Akka.NET v1.5.14, click here.

COMMITS LOC+ LOC- AUTHOR
11 25 21 dependabot[bot]
3 14 2 Aaron Stannard
3 114 369 Simon Cropp
2 36 31 Gregorius Soedharmo
1 41 43 Lehonti Ramos
1 38 0 Yaroslav Paslavskiy
1 3 0 Sean Killeen
1 227 25 Drew
1 1 1 szaliszali

1.5.13 August 26th 2023

Akka.NET v1.5.13 is a maintenance release with several bug fixes and also performance and QOL improvements.

If you want to see the full set of changes made in Akka.NET v1.5.13, click here.

COMMITS LOC+ LOC- AUTHOR
18 25 25 dependabot[bot]
6 435 200 Gregorius Soedharmo
4 512 293 Aaron Stannard
2 3 7 Simon Cropp
1 7 0 Sergey Popov
1 66 17 Ismael Hamed
1 1 1 HamzaAmjad-RG

1.5.13-beta1 August 26th 2023

Akka.NET v1.5.13-beta1 is a maintenance release with several performance and QOL improvements.

If you want to see the full set of changes made in Akka.NET v1.5.13-beta1, click here.

COMMITS LOC+ LOC- AUTHOR
11 15 15 dependabot[bot]
3 302 143 Aaron Stannard
2 384 195 Gregorius Soedharmo
1 7 0 Sergey Popov
1 66 17 Ismael Hamed
1 3 5 Simon Cropp
1 1 1 HamzaAmjad-RG

1.5.12 August 2nd 2023

Akka.NET v1.5.12 is a maintenance release with a minor API change and a minor bug fix.

If you want to see the full set of changes made in Akka.NET v1.5.12, click here.

COMMITS LOC+ LOC- AUTHOR
5 34 18 Aaron Stannard
2 150 51 Gregorius Soedharmo
1 1 1 dependabot[bot]
1 1 1 Jim Aho

1.5.11 July 27th 2023

Akka.NET v1.5.11 is a maintenance release with a minor API change and internal code modernization/cleanup.

If you want to see the full set of changes made in Akka.NET v1.5.11, click here.

COMMITS LOC+ LOC- AUTHOR
1 465 321 Gregorius Soedharmo
1 22 2 Aaron Stannard

1.5.10 July 26th 2023

Akka.NET v1.5.10 is a maintenance release with a minor API change.

If you want to see the full set of changes made in Akka.NET v1.5.10, click here.

COMMITS LOC+ LOC- AUTHOR
1 70 12 Gregorius Soedharmo

1.5.9 July 18th 2023

Akka.NET v1.5.9 is a maintenance release that introduces some performance improvements and internal code cleanup/modernization.

Changes:

Improvements:

Code modernization:

Update dependency versions:

Akka.TestKit.Xunit Changes

Due to breaking API change in Xunit 2.5.0, updating to Akka.NET 1.5.9 might break your unit tests. Some of the breaking change that we've noticed are:

  • AkkaEqualException constructor has been changed due to changes in Xunit API. If you're using this class, please use the AkkaEqualException.ForMismatchedValues() static method instead of using the constructor.
  • Testing for exception types by calling async code inside a sync delegate will not unwrap the AggregateException thrown. Either use async all the way or manually unwrap the exception.
  • Xunit Asset.Equal() does not automatically check for collection item equality anymore, that means doing Assert.Equal() between two dictionary or list would not work anymore.
  • Some Xunit classes have been changed from public to private. If you're using these classes, you will need to refactor your code.
  • FsCheck.Xunit: Xunit Roslyn analyzer has become a bit too overzealous and insists that all unit test method can only return either void or Task and will raise a compilation error if you tried to return anything else. If you're using FsCheck.Xunit, you will need to use a pragma to disable this check: #pragma warning disable xUnit1028.

If you want to see the full set of changes made in Akka.NET v1.5.9, click here.

COMMITS LOC+ LOC- AUTHOR
12 171 155 dependabot[bot]
7 466 165 Aaron Stannard
4 1648 1725 Simon Cropp
1 9 4 Gregorius Soedharmo
1 7 1 Michael Buck

1.5.8 June 15th 2023

Akka.NET v1.5.8 is a maintenance release that introduces some new features and fixes some bugs with Akka.NET v1.5.7 and earlier.

If you want to see the full set of changes made in Akka.NET v1.5.8, click here.

COMMITS LOC+ LOC- AUTHOR
9 11 11 dependabot[bot]
2 8 0 Aaron Stannard
2 75 4 Gregorius Soedharmo
2 132 158 Simon Cropp
1 431 1 Ismael Hamed
1 1 1 Andrea Di Stefano

1.5.7 May 17th 2023

Akka.NET v1.5.7 is a significant release that introduces a major new reliable message delivery feature to Akka.NET and Akka.Cluster.Sharding: Akka.Delivery.

Akka.Delivery

Akka.Delivery is a reliable delivery system that leverages built-in actors, serialization, and persistence to help guarantee that all messages sent from one producer to one consumer will be delivered, in-order, even across process restarts / actor restarts / network outages.

Akka.Delivery's functionality is divded across four libraries:

  • Akka - defines the base definitions for all messages, the ProducerController type, and the ConsumerController type;
  • Akka.Cluster - contains the serialization definitions for Akka.Delivery;
  • Akka.Persistence - contains the EventSourcedProducerQueue implementation, an optional feature that can be used to make the ProducerController's outbound delivery queue persisted to the Akka.Persistence Journal and SnapshotStore; and
  • Akka.Cluster.Sharding - contains the definitions for the ShardingProducerController and ShardingConsumerController.

We've documented how these features work in the following two detailed articles official website:

If you want to see the full set of changes made in Akka.NET v1.5.7, click here.

COMMITS LOC+ LOC- AUTHOR
9 13972 135 Aaron Stannard
6 92 88 Ebere Abanonu
4 803 807 Simon Cropp
3 70 53 Gregorius Soedharmo
3 3 3 dependabot[bot]

1.5.6 May 8th 2023

Version 1.5.6 is a patch with a few minor bug fix

If you want to see the full set of changes made in Akka.NET v1.5.6, click here.

COMMITS LOC+ LOC- AUTHOR
2 4 4 Aaron Stannard
2 33 84 Simon Cropp
2 2 2 dependabot[bot]
2 2 2 Richard Smith
1 2 2 Gregorius Soedharmo
1 2 12 Sergey Popov

1.5.5 May 4th 2023

If you want to see the full set of changes made in Akka.NET v1.5.5, click here.

7 contributors since release 1.5.4

COMMITS LOC+ LOC- AUTHOR
16 68 34 Ebere Abanonu
9 598 1053 Simon Cropp
4 4 4 dependabot[bot]
2 229 5 Gregorius Soedharmo
1 33 28 Aaron Stannard
1 256 3 Malcolm Learner
1 148 140 Sergey Popov

1.5.4 April 25th 2023

IStash Enhancements

IStash API have been improved with metrics API and its bound/capacity can be programatically set. Documentation can be read here

If you want to see the full set of changes made in Akka.NET v1.5.4, click here.

5 contributors since release 1.5.3

COMMITS LOC+ LOC- AUTHOR
7 477 486 Ebere Abanonu
4 627 143 Aaron Stannard
2 2 2 dependabot[bot]
1 87 0 Sergey Popov
1 0 1 Gregorius Soedharmo

1.5.3 April 20th 2023

SQL Transaction Isolation Level Setting

In 1.5.3, we're introducing fine-grained control over transaction isolation level inside the Akka.Persistence.Sql.Common common library. This setting will be propagated to the rest of the SQL persistence plugin ecosystem and the Akka.Hosting package in their next release version.

Four new HOCON settings are introduced:

  • akka.persistence.journal.{plugin-name}.read-isolation-level
  • akka.persistence.journal.{plugin-name}.write-isolation-level
  • akka.persistence.snapshot-store.{plugin-name}.read-isolation-level
  • akka.persistence.snapshot-store.{plugin-name}.write-isolation-level

you can go to the official Microsoft documentation to read more about these isolation level settings.

If you want to see the full set of changes made in Akka.NET v1.5.3, click here.

COMMITS LOC+ LOC- AUTHOR
23 1284 1248 Ebere Abanonu
4 7 7 dependabot[bot]
3 933 267 Gregorius Soedharmo
2 4498 4407 Aaron Stannard

1.5.2 April 5th 2023

There are some major behavioral changes introduced to Akka.Cluster and Akka.Persistence in Akka.NET v1.5.2 - to learn how these changes might affect your Akka.NET applications, please see our Akka.NET v1.5.2 Upgrade Advisories on the Akka.NET website.

If you want to see the full set of changes made in Akka.NET v1.5.2, click here.

COMMITS LOC+ LOC- AUTHOR
56 2580 2913 Ebere Abanonu
5 201 82 Aaron Stannard
4 754 558 Ismael Hamed
3 4 4 dependabot[bot]
2 33 12 Sergey Popov
1 511 53 Gregorius Soedharmo
1 1 1 ondravondra
1 0 2 Simon Cropp

1.5.1 March 15th 2023

If you want to see the full set of changes made in Akka.NET v1.5.1, click here.

COMMITS LOC+ LOC- AUTHOR
9 425 331 Ebere Abanonu
5 6 6 dependabot[bot]
3 2399 109 Sergey Popov
1 97 4 Gregorius Soedharmo
1 2 2 Aaron Stannard

1.5.0 March 2nd 2023

Version 1.5.0 is a major new release of Akka.NET that is now marked as stable and ready for production use.

You can read the full notes about what's changed in Akka.NET v1.5 here. We also encourage you to watch our video: "Akka NET v1.5 New Features and Upgrade Guide"

If you want to see the full set of changes made in Akka.NET v1.5.0 so far, click here.

COMMITS LOC+ LOC- AUTHOR
95 25041 24976 Gregorius Soedharmo
85 89784 18362 Aaron Stannard
76 95 95 dependabot[bot]
18 3201 908 Ismael Hamed
5 230 251 Sergey Popov
2 77 7 Vagif Abilov
2 38 8 Brah McDude
1 92 92 nabond251
1 843 0 Drew
1 7 6 Tjaart Blignaut
1 5 4 Sean Killeen
1 32 1 JonnyII
1 26 4 Thomas Stegemann
1 203 5 Ebere Abanonu
1 2 2 Popov Sergey
1 2 2 Denis
1 16 0 Damian
1 11 2 Nicolai Davies
1 101 3 aminchenkov
1 1 1 zbynek001
1 1 1 Michel van Os
1 1 1 Adrian D. Alvarez

1.5.0-beta5 February 28th 2023

Version 1.5.0-beta5 contains breaking API changes and new API changes for Akka.NET.

COMMITS LOC+ LOC- AUTHOR
2 50 28 Aaron Stannard
1 22 32 Gregorius Soedharmo

1.5.0-beta4 February 28th 2023

Version 1.5.0-beta4 contains breaking API changes and new API changes for Akka.NET.

COMMITS LOC+ LOC- AUTHOR
2 110 37 Aaron Stannard
1 253 7 Gregorius Soedharmo

1.5.0-beta3 February 27th 2023

Version 1.5.0-beta3 contains breaking API changes and new API changes for Akka.NET.

COMMITS LOC+ LOC- AUTHOR
14 68 794 Gregorius Soedharmo
5 997 498 Aaron Stannard
3 6 6 dependabot[bot]

1.5.0-beta2 February 20th 2023

Version 1.5.0-beta2 contains breaking API changes and new API changes for Akka.NET.

COMMITS LOC+ LOC- AUTHOR
8 260 942 Aaron Stannard
5 169 60 Gregorius Soedharmo

1.5.0-beta1 February 20th 2023

Version 1.5.0-beta1 contains breaking API changes and new API changes for Akka.NET.

Breaking Changes: Logging

In akkadotnet#6408 the entire ILoggingAdapter interface was rewritten in order to improve extensibility and performance (logging is now 30-40% faster in all cases and allocates ~50% fewer objects for large format strings).

All of the changes made here are source compatible, but not binary compatible - meaning that users and package authors will need to do the following:

  • Add using Akka.Event in all files that used the ILoggingAdapter and
  • Recompile.

NOTE: you can use a global using Akka.Event directive to do this solution / project-wide if your project supports C# 10 and / or .NET 6.

In addition to improving the performance of the ILoggingAdapter system, we've also made it more extensible - for instance, you can now globally configure the ILogMessageFormatter via the following HOCON:

akka { 
    loglevel=INFO,
    loggers=["Akka.Logger.Serilog.SerilogLogger, Akka.Logger.Serilog"]
    logger-formatter="Akka.Logger.Serilog.SerilogLogMessageFormatter, Akka.Logger.Serilog"
}

That will allow users to use the SerilogLogMessageFormatter globally throughout their applications - no more annoying calls like this inside individual actors that want to use semantic logging:

private readonly ILoggingAdapter _logger = Context.GetLogger<SerilogLoggingAdapter>();

Breaking Changes: Akka.Persistence.Sql.Common

This is a breaking change that should effect almost no users, but we deleted some old, bad ideas from the API surface and it might require all Akka.Persistence.Sql* plugins to be recompiled.

For what it's worth, Akka.Persistence.Sql.Common's performance has been improved significantly and we'll continue working on that with some additional API changes this week.

Other Changes and Additions

If you want to see the full set of changes made in Akka.NET v1.5.0 so far, click here.

COMMITS LOC+ LOC- AUTHOR
12 15 15 dependabot[bot]
11 1930 1278 Aaron Stannard
2 143 73 Sergey Popov
1 26 4 Thomas Stegemann
1 1 1 Michel van Os

1.5.0-alpha4 February 1st 2023

Version 1.5.0-alpha3 contains several bug fixes and new features to Akka.NET

If you want to see the full set of changes made in Akka.NET v1.5.0 so far, click here.

COMMITS LOC+ LOC- AUTHOR
27 30 30 dependabot[bot]
11 2212 165 Gregorius Soedharmo
4 741 208 Ismael Hamed
4 680 112 Aaron Stannard
3 87 178 Sergey Popov
1 843 0 Drew
1 2 2 Popov Sergey

1.5.0-alpha3 November 15th 2022

Akka.NET v1.5.0-alpha3 is a security patch for Akka.NET v1.5.0-alpha2 but also includes some other fixes.

Security Advisory: Akka.NET v1.5.0-alpha2 and earlier depend on an old System.Configuration.ConfigurationManager version 4.7.0 which transitively depends on System.Common.Drawing v4.7.0. The System.Common.Drawing v4.7.0 is affected by a remote code execution vulnerability GHSA-ghhp-997w-qr28.

We have separately created a security advisory for Akka.NET Versions < 1.4.46 and < 1.5.0-alpha3 to track this issue.

Fixes and Updates

You can see the full set of tracked issues for Akka.NET v1.5.0 here.

1.5.0-alpha2 October 17th 2022

Akka.NET v1.5.0-alpha2 is a maintenance release for Akka.NET v1.5 that contains numerous performance improvements in critical areas, including core actor message processing and Akka.Remote.

Performance Fixes

In sum you should expect to see total memory consumption, garbage collection, and throughput improve when you upgrade to Akka.NET v1.5.0-alpha2.

Other Features and Improvements

1.5.0-alpha1 August 22 2022

Akka.NET v1.5.0-alpha1 is a major release that contains a lot of code improvement and rewrites/refactors. Major upgrades to Akka.Cluster.Sharding in particular.

Deprecation

Some codes and packages are being deprecated in v1.5

Changes

Akka

Akka.Cluster

Akka.Cluster.Sharding

The Akka.Cluster.Sharding changes in Akka.NET v1.5 are significant, but backwards compatible with v1.4 and upgrades should happen seamlessly.

Akka.Cluster.Sharding's state-store-mode has been split into two parts:

  • CoordinatorStore
  • ShardStore

Which can use different persistent mode configured via akka.cluster.sharding.state-store-mode & akka.cluster.sharding.remember-entities-store.

Possible combinations:

state-store-mode remember-entities-store CoordinatorStore mode ShardStore mode
persistence (default) - (ignored) persistence persistence
ddata ddata ddata ddata
ddata eventsourced (new) ddata persistence

There should be no breaking changes from user perspective. Only some internal messages/objects were moved. There should be no change in the PersistentId behavior and default persistent configuration (akka.cluster.sharding.state-store-mode)

This change is designed to speed up the performance of Akka.Cluster.Sharding coordinator recovery by moving remember-entities recovery into separate actors - this also solves major performance problems with the ddata recovery mode overall.

The recommended settings for maximum ease-of-use for Akka.Cluster.Sharding going forward will be:

akka.cluster.sharding{
  state-store-mode = ddata
  remember-entities-store = eventsourced
}

However, for the sake of backwards compatibility the Akka.Cluster.Sharding defaults have been left as-is:

akka.cluster.sharding{
  state-store-mode = persistence
  # remember-entities-store (not set - also uses legacy Akka.Persistence)
}

Switching over to using remember-entities-store = eventsourced will cause an initial migration of data from the ShardCoordinator's journal into separate event journals going forward - this migration is irreversible without taking the cluster offline and deleting all Akka.Cluster.Sharding-related data from Akka.Persistence, so plan accordingly.

Akka.Cluster.Tools

Akka.Persistence.Query

Akka.Remote

Akka.Streams

Akka.TestKit

1.4.37 April 14 2022

Akka.NET v1.4.37 is a minor release that contains some minor bug fixes.

If you want to see the full set of changes made in Akka.NET v1.4.37, click here.

COMMITS LOC+ LOC- AUTHOR
3 15 4 Gregorius Soedharmo
1 2 2 dependabot[bot]

1.4.36 April 4 2022

Akka.NET v1.4.36 is a minor release that contains some bug fixes. Most of the changes have been aimed at improving our web documentation and code cleanup to modernize some of our code.

Bug fixes:

If you want to see the full set of changes made in Akka.NET v1.4.36, click here.

COMMITS LOC+ LOC- AUTHOR
5 274 33 Gregorius Soedharmo
4 371 6 Ebere Abanonu
3 9 3 Aaron Stannard
1 34 38 Ismael Hamed
1 2 3 Adrian Leonhard

1.4.35 March 18 2022

Akka.NET v1.4.35 is a minor release that contains some bug fixes. Most of the changes have been aimed at improving our web documentation and code cleanup to modernize some of our code.

Bug fixes:

If you want to see the full set of changes made in Akka.NET v1.4.35, click here.

COMMITS LOC+ LOC- AUTHOR
6 2178 174 Aaron Stannard
2 43 33 Gregorius Soedharmo
1 71 19 Ismael Hamed
1 1 1 dependabot[bot]

1.4.34 March 7 2022

Akka.NET v1.4.34 is a minor release that contains some bug fixes. Most of the changes have been aimed at improving our web documentation and code cleanup to modernize some of our code.

Bug fixes:

Improvements:

If you want to see the full set of changes made in Akka.NET v1.4.34, click here.

COMMITS LOC+ LOC- AUTHOR
12 1177 718 Ebere Abanonu
6 192 47 Gregorius Soedharmo
3 255 167 Ismael Hamed
1 3 0 Aaron Stannard
1 126 10 Drew

1.4.33 February 14 2022

Akka.NET v1.4.33 is a minor release that contains some bug fixes. Most of the changes have been aimed at improving our web documentation and code cleanup to modernize some of our code. The most important bug fix is the actor Props memory leak when actors are cached inside Akka.Remote.

If you want to see the full set of changes made in Akka.NET v1.4.33, click here.

COMMITS LOC+ LOC- AUTHOR
63 1264 1052 Ebere Abanonu
9 221 27 Brah McDude
8 2537 24 Gregorius Soedharmo
2 4 1 Aaron Stannard
1 2 2 ignobilis

1.4.32 January 19 2022

Akka.NET v1.4.32 is a minor release that contains some API improvements. Most of the changes have been aimed at improving our web documentation and code cleanup to modernize some of our code. One big improvement in this version release is the Hyperion serialization update.

Hyperion 0.12.0 introduces a new deserialization security mechanism to allow users to selectively filter allowed types during deserialization to prevent deserialization of untrusted data described here. This new feature is exposed in Akka.NET in HOCON through the new akka.actor.serialization-settings.hyperion.allowed-types settings or programmatically through the new WithTypeFilter method in the HyperionSerializerSetup class.

The simplest way to programmatically describe the type filter is to use the convenience class TypeFilterBuilder:

var typeFilter = TypeFilterBuilder.Create()
    .Include<AllowedClassA>()
    .Include<AllowedClassB>()
    .Build();
var setup = HyperionSerializerSetup.Default
    .WithTypeFilter(typeFilter);

You can also create your own implementation of ITypeFilter and pass an instance of it into the WithTypeFilter method.

For complete documentation, please read the Hyperion readme on filtering types for secure deserialization.

If you want to see the full set of changes made in Akka.NET v1.4.32, click here.

COMMITS LOC+ LOC- AUTHOR
11 1752 511 Aaron Stannard
8 1433 534 Gregorius Soedharmo
3 754 222 Ismael Hamed
2 3 6 Brah McDude
2 227 124 Ebere Abanonu
1 331 331 Sean Killeen
1 1 1 TangkasOka

1.4.31 December 20 2021

Akka.NET v1.4.31 is a minor release that contains some bug fixes.

Akka.NET v1.4.30 contained a breaking change that broke binary compatibility with all Akka.DI plugins. Even though those plugins are deprecated that change is not compatible with our SemVer standards and needed to be reverted. We regret the error.

Bug fixes:

COMMITS LOC+ LOC- AUTHOR
1 9 2 Gregorius Soedharmo

1.4.30 December 20 2021

Akka.NET v1.4.30 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.

New features:

Bug fixes:

If you want to see the full set of changes made in Akka.NET v1.4.30, click here.

COMMITS LOC+ LOC- AUTHOR
6 75 101 Aaron Stannard
2 53 5 Brah McDude
2 493 12 Drew
1 289 383 Andreas Dirnberger
1 220 188 Gregorius Soedharmo
1 173 28 Ismael Hamed

1.4.29 December 13 2021

Maintenance Release for Akka.NET 1.4 Akka.NET v1.4.29 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.

New features:

Documentation:

Bug fixes:

If you want to see the full set of changes made in Akka.NET v1.4.29, click here.

COMMITS LOC+ LOC- AUTHOR
7 82 51 Aaron Stannard
6 1381 483 Gregorius Soedharmo
4 618 85 Andreas Dirnberger
1 4 4 Luca V
1 1 1 dependabot[bot]

1.4.28 November 10 2021

Maintenance Release for Akka.NET 1.4 Akka.NET v1.4.28 is a minor release that contains some enhancements for Akka.Streams and some bug fixes.

New Akka.Streams Stages Akka.NET v1.4.28 includes two new Akka.Streams stages:

  • Source.Never - a utility stage that never emits any elements, never completes, and never fails. Designed primarily for unit testing.
  • Flow.WireTap - the WireTap stage attaches a given Sink to a Flow without affecting any of the upstream or downstream elements. This stage is designed for performance monitoring and instrumentation of Akka.Streams graphs.

In addition to these, here are some other changes introduced Akka.NET v1.4.28:

If you want to see the full set of changes made in Akka.NET v1.4.28, click here.

COMMITS LOC+ LOC- AUTHOR
16 2707 1911 Sean Killeen
8 1088 28 Ismael Hamed
6 501 261 Gregorius Soedharmo
5 8 8 dependabot[bot]
4 36 86 Aaron Stannard
1 1 0 Jarl Sveinung Flø Rasmussen

Special thanks for @SeanKilleen for contributing extensive Markdown linting and automated CI checks for that to our documentation! akkadotnet#5312

1.4.27 October 11 2021

Maintenance Release for Akka.NET 1.4 Akka.NET v1.4.27 is a small release that contains some major performance improvements for Akka.Remote.

Performance Fixes In RemoteActorRefProvider address paring, caching and resolving improvements Akka.NET contributor @Zetanova introduced some major changes that make the entire ActorPath class much more reusable and more parse-efficient.

Our last major round of Akka.NET performance improvements in Akka.NET v1.4.25 produced the following:

OSVersion:                         Microsoft Windows NT 6.2.9200.0
ProcessorCount:                    16
ClockSpeed:                        0 MHZ
Actor Count:                       32
Messages sent/received per client: 200000  (2e5)
Is Server GC:                      True
Thread count:                      111

Num clients, Total [msg], Msgs/sec, Total [ms]
         1,  200000,    130634,    1531.54
         5, 1000000,    246975,    4049.20
        10, 2000000,    244499,    8180.16
        15, 3000000,    244978,   12246.39
        20, 4000000,    245159,   16316.37
        25, 5000000,    243333,   20548.09
        30, 6000000,    241644,   24830.55

In Akka.NET v1.4.27 those numbers now look like:

OSVersion:                         Microsoft Windows NT 6.2.9200.
ProcessorCount:                    16                            
ClockSpeed:                        0 MHZ                         
Actor Count:                       32                            
Messages sent/received per client: 200000  (2e5)                 
Is Server GC:                      True                          
Thread count:                      111                           
                                                                 
Num clients, Total [msg], Msgs/sec, Total [ms]                   
         1,  200000,    105043,    1904.29                       
         5, 1000000,    255494,    3914.73                       
        10, 2000000,    291843,    6853.30                       
        15, 3000000,    291291,   10299.75                       
        20, 4000000,    286513,   13961.68                       
        25, 5000000,    292569,   17090.64                       
        30, 6000000,    281492,   21315.35

To put these numbers in comparison, here's what Akka.NET's performance looked like as of v1.4.0:

Num clients (actors)    Total [msg] Msgs/sec    Total [ms]
1   200000  69736   2868.60
5   1000000 141243  7080.98
10  2000000 136771  14623.27
15  3000000 38190   78556.49
20  4000000 32401   123454.60
25  5000000 33341   149967.08
30  6000000 126093  47584.92

We've made Akka.Remote consistently faster, more predictable, and reduced total memory consumption significantly in the process.

You can see the full set of changes introduced in Akka.NET v1.4.27 here

COMMITS LOC+ LOC- AUTHOR
3 89 8 Aaron Stannard
1 856 519 Andreas Dirnberger
1 3 4 Vadym Artemchuk
1 261 233 Gregorius Soedharmo
1 1 1 dependabot[bot]

1.4.26 September 28 2021

Maintenance Release for Akka.NET 1.4 Akka.NET v1.4.26 is a very small release that addresses one wire format regression introduced in Akka.NET v1.4.20.

Bug Fixes and Improvements

You can see the full set of changes introduced in Akka.NET v1.4.26 here

COMMITS LOC+ LOC- AUTHOR
4 99 96 Gregorius Soedharmo
3 79 5 Aaron Stannard
1 1 1 dependabot[bot]

1.4.25 September 08 2021

Maintenance Release for Akka.NET 1.4 Akka.NET v1.4.25 includes some significant performance improvements for Akka.Remote and a number of important bug fixes and improvements.

Bug Fixes and Improvements

Performance Improvements Using our standard RemotePingPong benchmark, the difference between v1.4.24 and v1.4.24 is significant:

v1.4.24

OSVersion:                         Microsoft Windows NT 6.2.9200.0 
ProcessorCount:                    16                              
ClockSpeed:                        0 MHZ                           
Actor Count:                       32                              
Messages sent/received per client: 200000  (2e5)                   
Is Server GC:                      True                            
Thread count:                      111                             
                                                                   
Num clients, Total [msg], Msgs/sec, Total [ms]                     
         1,  200000,     96994,    2062.08                         
         5, 1000000,    194818,    5133.93                         
        10, 2000000,    198966,   10052.93                         
        15, 3000000,    199455,   15041.56                         
        20, 4000000,    198177,   20184.53                         
        25, 5000000,    197613,   25302.80                         
        30, 6000000,    197349,   30403.82

v1.4.25

OSVersion:                         Microsoft Windows NT 6.2.9200.0
ProcessorCount:                    16
ClockSpeed:                        0 MHZ
Actor Count:                       32
Messages sent/received per client: 200000  (2e5)
Is Server GC:                      True
Thread count:                      111

Num clients, Total [msg], Msgs/sec, Total [ms]
         1,  200000,    130634,    1531.54
         5, 1000000,    246975,    4049.20
        10, 2000000,    244499,    8180.16
        15, 3000000,    244978,   12246.39
        20, 4000000,    245159,   16316.37
        25, 5000000,    243333,   20548.09
        30, 6000000,    241644,   24830.55

This represents a 24% overall throughput improvement in Akka.Remote across the board. We have additional PRs staged that should get aggregate performance improvements above 40% for Akka.Remote over v1.4.24 but they didn't make it into the Akka.NET v1.4.25 release.

You can see the full set of changes introduced in Akka.NET v1.4.25 here

COMMITS LOC+ LOC- AUTHOR
32 1301 400 Aaron Stannard
4 358 184 Andreas Dirnberger
3 414 149 Gregorius Soedharmo
3 3 3 dependabot[bot]
2 43 10 zbynek001
1 14 13 tometchy
1 139 3 carlcamilleri

1.4.24 August 17 2021

Maintenance Release for Akka.NET 1.4

Bug Fixes and Improvements

You can see the full set of changes introduced in Akka.NET v1.4.24 here

COMMITS LOC+ LOC- AUTHOR
5 360 200 Aaron Stannard
3 4 4 dependabot[bot]
1 548 333 Arjen Smits
1 42 19 Martijn Schoemaker
1 26 27 Andreas Dirnberger
1 171 27 Gregorius Soedharmo

1.4.23 August 09 2021

Maintenance Release for Akka.NET 1.4

Akka.NET v1.4.23 is designed to patch an issue that occurs on Linux machines using Akka.Cluster.Sharding with akka.cluster.sharding.state-store-mode=ddata and akka.cluster.sharding.remember-entities=on: "System.DllNotFoundException: Unable to load shared library 'lmdb' or one of its dependencies"

In Akka.NET v1.4.21 we added built-in support for Akka.DistributedData.LightningDb for use with the remember-entities setting, but we never received any reports about this issue until shortly after v1.4.22 was released. Fundamentally, the problem was that our downstream dependency, Lightning.NET, doesn't include any of the necessary Linux native binaries in their distributions currently. So in the meantime, we've published our own "vendored" distribution of Lightning.NET to NuGet until a new official one is released that includes these binaries.

There are some other small fixes included in Akka.NET v1.4.23 and you can read about them here.

COMMITS LOC+ LOC- AUTHOR
8 136 2803 Aaron Stannard
2 61 3 Gregorius Soedharmo

1.4.22 August 05 2021

Maintenance Release for Akka.NET 1.4

Akka.NET v1.4.22 is a fairly large release that includes an assortment of performance and bug fixes.

Performance Fixes Akka.NET v1.4.22 includes a significant performance improvement for Ask<T>, which now requires 1 internal await operation instead of 3:

Before

Method Iterations Mean Error StdDev Gen 0 Gen 1 Gen 2 Allocated
RequestResponseActorSelection 10000 83.313 ms 0.7553 ms 0.7065 ms 4666.6667 - - 19 MB
CreateActorSelection 10000 5.572 ms 0.1066 ms 0.1140 ms 953.1250 - - 4 MB

After

Method Iterations Mean Error StdDev Gen 0 Gen 1 Gen 2 Allocated
RequestResponseActorSelection 10000 71.216 ms 0.9885 ms 0.9246 ms 4285.7143 - - 17 MB
CreateActorSelection 10000 5.462 ms 0.0495 ms 0.0439 ms 953.1250 - - 4 MB

Bug Fixes and Improvements

You can see the full set of changes introduced in Akka.NET v1.4.22 here

Akka.Cluster.Sharding.RepairTool In addition to the work done on Akka.NET itself, we've also created a separate tool for cleaning up any left-over data in the event of an Akka.Cluster.Sharding cluster running with akka.cluster.sharding.state-store-mode=persistence was terminated abruptly before it had a chance to cleanup.

We've added documentation to the Akka.NET website that explains how to use this tool here: https://getakka.net/articles/clustering/cluster-sharding.html#cleaning-up-akkapersistence-shard-state

And the tool itself has documentation here: https://github.com/petabridge/Akka.Cluster.Sharding.RepairTool

COMMITS LOC+ LOC- AUTHOR
16 1254 160 Gregorius Soedharmo
7 104 83 Aaron Stannard
5 8 8 dependabot[bot]
4 876 302 Ismael Hamed
2 3942 716 zbynek001
2 17 3 Andreas Dirnberger
1 187 2 andyfurnival
1 110 5 Igor Fedchenko