After a message is sent to the server, the business may want the consumer to receive it at a later time point rather than immediately. This type of message is called "scheduled message".
A subscription type (subscriptionType) is a type of topic subscription by a consumer. You can specify multiple subscription types, such as exclusive, failover, and shared.
A subscription name (subscriptionName) uniquely identifies a group of subscribers.
A partition index (partionindex) denotes the number of a partition in a topic.
The shared type is a subscription type where a subscriber group can have multiple concurrent active consumer connections, and a message consumed by one of the consumers will not be consumed again by other consumers.
The exclusive type is a subscription type where a subscriber group can have only one active consumer.
A batch ID (batchid) denotes the number of a message in a batch of messages.
A producer refers to a role that sends messages.
An entry is an element of a ledger, and a ledger is composed of a set of entries.
A consumer refers to a role that receives messages.
A message ID is the unique identifier of a message, which consists of four parts:
Each message will receive a message ID assigned by the Tencent Cloud system, which can be returned to you through the
SendMessage API request.
The message retention period refers to the retention period of a message that has been acknowledged by the consumer.
Tencent Distributed Message Queue (TDMQ) for Pulsar is a proprietary finance-grade distributed message middleware developed based on Pulsar, a top open-source project of Apache. It features high cross-region consistency, reliability, and concurrency. Currently, it is widely used in Tencent's most billing scenarios, including primary payment process as well as real-time reconciliation, monitoring, and big data analysis.
Message expiry time refers to the time to live (TTL) of an unacknowledged message.
A message type is used to identify the type of a topic. Two topic types are supported: persistent and non-persistent. A persistent topic will return an ack for successful delivery after the message is stored to the disk.
After a message is sent to the server, the business may want the consumer to receive it after a period of time rather than immediately. This type of message is called "delayed message".
The failover type is a subscription type where subscribers can exist in a primary/secondary relationship. The primary consumer consumes messages under normal conditions, and consumption will be switched to the secondary consumer when the primary consumer fails.
A ledger is an element in a topic, and a topic is composed of a set of ledgers.
A tenant corresponds to an
APPID in Tencent Cloud.