Should i upgrade to 4.0

Connect a mongo shell to the primary and use rs. When rs. At this point, you can run the 4. To enable these 4. Enabling these backwards-incompatible features can complicate the downgrade process since you must remove any persisted backwards-incompatible features before you downgrade. It is recommended that after upgrading, you allow your deployment to run without enabling these features for a burn-in period to ensure the likelihood of downgrade is minimal.

When you are confident that the likelihood of downgrade is minimal, enable these features. Ensure that no initial sync is in progress. Running setFeatureCompatibilityVersion command while an initial sync is in progress will cause the initial sync to restart. On the primary, run the setFeatureCompatibilityVersion command in the admin database:.

This command must perform writes to an internal system collection. If for any reason the command does not complete successfully, you can safely retry the command on the primary as the operation is idempotent. Version 5. Before you attempt any upgrade, please familiarize yourself with the content of this document. MongoDB Version. Feature Compatibility Version. Hex-encoded string v1.

The new named parameters feature means I can have big constructors and not get confused as to what each parameter is. Immutable objects are just that much easier.

Optional method parameters can reduce a lot of ugly method overrides, and make certain method calls a lot cleaner. If you're using COM or IronPython or any of a few similar frameworks, the dynamic keyword can also be a real lifesaver. NET 4. Foreign Key support in Linq to Entities, for example, is making life a lot easier for us. A lot of people are really excited about POCO support.

They also added support for some of the LINQ methods e. Distinct that were previously missing from the Entity Framework. So it will really all boil down to which frameworks you're using and how you're using them, and how expensive it will be for you to make the switch. First, what is compelling to me may mean nothing to you. Having said that, I would upgrade Visual Studio if budget allows.

In fact, personally I think there is a huge career risk in staying with a company that doesn't keep your tools up to date. You will fall behind in your knowledge of the field without access to the latest tools. As for converting all your projects just to convert them it seems like folly to me. Putting aside all the extra work distribution and upgrading the machines to have.

NET 4 , you have to consider the chance that you will have something go wrong. And if you are like me some things must be called from 3rd party programs using.

NET 3. My first rule would be that nothing is converted unless you are working on it anyway. But I would seriously look to convert anything that could use improvement from either parallel code, or COM interop. I do have a compelling project that was converted. I had a long running web method being called. In the version that exists now, I return from the method without knowing the results. Instead I gave the user a way to check later. By moving to a parallel foreach loop this works much better and I can let the user know if there were any errors.

The same project is also being converted to use RIA services which have greatly improved and reducing the amount of my own code. If you're starting a new project today, it's probably best to start it on 4. C 4 implies other things.. So don't just look at C as the reason to change, you also have to look at the whole stack. If there's still nothing compelling, then staying where you're at is probably a wise choice.

The multi monitor support is nifty but buggy. At this point, you can run the 4. To enable these 4. Enabling these backwards-incompatible features can complicate the downgrade process since you must remove any persisted backwards-incompatible features before you downgrade. It is recommended that after upgrading, you allow your deployment to run without enabling these features for a burn-in period to ensure the likelihood of downgrade is minimal. When you are confident that the likelihood of downgrade is minimal, enable these features.

Run the setFeatureCompatibilityVersion command against the admin database:. This command must perform writes to an internal system collection. If for any reason the command does not complete successfully, you can safely retry the command as the operation is idempotent. We also recommend that you take a backup first. This safely replaces the behavior of --reuse-values Mappings between chart versioning and GitLab versioning can be found here. During a major database upgrade, we ask you to set gitlab.

Ensure that you explicitly set it back to true for future updates. PostgreSQL 12 brings significant performance improvements. To upgrade the bundled PostgreSQL to version 12, the following steps are required: Prepare the existing database. Delete existing PostgreSQL data.

Update the postgresql. Restore the database. This is not a drop in replacement. Manual steps need to be performed to upgrade the database.