We are finally here, the first long term support release in this new era for EventStoreDB.
A lot has happened in the past two years at Event Store. We've expanded our teams in all areas. We released Event Store Cloud, which is available on AWS, GCP and Azure. Also we have made a lot of changes to our core product EventStoreDB which, among other things, includes a move to .NET core (single build, better platform support, faster, more reliable) and a move to gRPC (multi-language, simpler and more reliable client) as the main transport between client and server (TCP and HTTP are still around though).
The main focus on 20.10 was around hardening the release and making sure that it is as performant and reliable as it can be in production. A full list of the changes is available in the release notes.
Although there is not much in the way of new features in 20.10 it is worth mentioning again all the new features that came out as part of the 20.6 release. These include but are not limited to:
Server side filtering was introduced to reduce the need for projections. Although projections are a great feature of EventStoreDB, they don’t come without costs. Each projection you introduce increases the write amplification on the server as each time you write an event it has to be propagated out via any projection that is listening to it.
Server-side filtering is an easy, lightweight, way to filter out any events that you don’t care about without the need to write a projection.
More information about this feature can be found here.
This has been long requested and we are glad to announce that we have moved over to .NET Core 3.1. This has removed the need for mono and gives a more consistent cross platform experience.
One downside to this change is that we are now no longer able to support running the server on MacOS. However, in this case we do provide docker images that can be used.
Since the beginning EventStoreDB has supported two different client protocols, TCP and HTTP.
In 20.6 gRPC support was released. This widely adopted standard allows us to interop across lots of platforms with minimal effort. It also means we have been able to produce supported clients for a number of different languages:
With more to come.
Read only replicas are EventStoreDB’s replacement for clones. They are a type of node within the cluster that cannot be promoted but can still be read from. They are a great way to scale out reads while avoiding any performance effects from having additional followers. More can be found here.
With 20.6.0 EvenStoreDB has moved to a secure-by-default approach. The reason for this is that current usage has moved more over to cloud hosted environments, which are often exposed to the internet. Previously customers relied on running in isolated environments and networks to keep their cluster secure but this isn't always the case any more. We want relaxing security to be an active decision made by the customer running the cluster.
This introduces some usability issues so tools and options have been introduced make setting up a cluster easier:
More detailed information about what new features were introduced as part of 20.6 can be found here.
The most important aspect of this release is that it's a long term support (LTS) release. That means, as part of our new release strategy, it will be supported for 24 months. It also means we will shortly be ending support for v4.x
We talked about this back in May. Going forward EventStoreDB will have three releases a year, each in February, June and October. Both the February and June will be normal releases and supported for 4 months. The October release will be an LTS release and supported for 24 months. With the potential for an additional 2 month grace period for you to organise your upgrade.
We will be introducing new features in the February and June release so that customers can get early access to what is coming. Then we can spend time hardening the next release in preparation for the LTS.
The following diagram helps to visualize how releases will work going forwards:
Well, it depends on which version of EventStoreDB you are running.
If you would like further advice on upgrading please contact your customer success manager / the support team.
20.10 will be available on the Event Store Cloud platform before the end of the year.
The team has been working hard on a new documentation site that will make it easier to start with Event Store. Check out our revamped document site here.