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This article introduces the knowledge of "what are the new features of Pulsar 2.0". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Pulsar 2.0 is a new major version of Pulsar with some major changes, including a simplified Topic name, the addition of Pulsar Functions functionality, and some terminology changes.

New features of Pulsar 2.0A major change in the lightweight computing function of DescriptionPulsar FunctionsPulsar

You need to be aware of some major changes that can significantly affect the daily use of Pulsar.

Property Vs. Tenant

In previous versions, Pulsar had a concept of property. A property is essentially the exact same thing as a tenant, so the "property" terminology has been removed in version 2.0. The pulsar-admin properties command-line interface, for example, has been replaced with the pulsar-admin tenants interface. In some cases, properties is still used, but it is not recommended and will be completely removed in subsequent updates.

Topic name

Prior to version 2.0, all Pulsar topics had the following form:

{persistent | non-persistent}: / / property/cluster/namespace/topic

There are two important changes in Pulsar 2.0:

No longer use the cluster part

Property is changed to tenant

You can use a flexible naming system to simplify topic names.

/ is not allowed in topic name

No longer use the cluster part

The cluster component has been removed from topic names. Thus, all topic names now have the following form:

{persistent | non-persistent}: / / tenant/namespace/topic

The previous named form of topic has been used, its naming form has not changed, and will not change in the future.

Topic flexibility naming

Within Pulsar 2.0, all Topic names take the form shown above, but in many cases (for simplicity), simplified names can be used. The flexible naming system has default values based on topic type, tenant and namespace. The default values are as follows:

Topic default topic type persistent tenant public namespace default

The following table is an example of a translation of a topic name using implicit default values:

Enter the topic name my-topicpersistent://public/default/my-topicmy-tenant/my-namespace/my-topicpersistent://tenant/namespace/topic after topic name conversion

For non-persistent topics, you need to specify the full name of the topic, because the default rule for persisting topic names does not apply here. Therefore, instead of using a simplified name such as non-persistent://my-topic, you should use non-persistent://public/default/my-topic.

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