Data Engineering Streaming
- Data Engineering Streaming 10.5.4
- All Products
Subscription Starting Pattern
The starting pattern of the subscription name from which the Google PubSub source starts reading messages from a topic when you run a mapping.
By default, the subscription name is prefixed with
Amount of time, in seconds, to wait for an acknowledgement for a message that was received by a subscriber, before Google PubSub can retry delivering the same message.
Recommended: 150 seconds
Message Retention Duration
Amount of time, in days, to retain unacknowledged messages in the subscription's backlog from the time a message is published.
A message that cannot be delivered within the maximum retention time is deleted and is no longer accessible.
Default is 7 days.
Time in days after which the subscriptions without any subscriber activity expires. If Google PubSub detects subscriber activity, the subscription deletion clock restarts.
Specify 0 for no expiry.
Max Message Count
The maximum number of messages to return for each subscriber request.
Google PubSub might return less messages than the specified number of messages.
Recommended: 1000 messages
Max Message Size
Maximum incoming message size for each subscriber request, in byte.
Executor Thread Count
Specify the executor thread count for each subscriber request.
Default is 4.
If there are no messages, return immediately for each read request.