A snapshot resource. Snapshots are used in
operations, which allow you to manage message acknowledgments in
bulk. That is, you can set the acknowledgment state of messages in
an existing subscription to the state captured by a snapshot.
The name of the snapshot.
The name of the topic from which this
snapshot is retaining messages.
The snapshot is guaranteed to exist up until this time. A
newly-created snapshot expires no later than 7 days from the
time of its creation. Its exact lifetime is determined at
creation by the existing backlog in the source subscription.
Specifically, the lifetime of the snapshot is
7 days - (age of oldest unacked message in the subscription).
For example, consider a subscription whose oldest unacked
message is 3 days old. If a snapshot is created from this
subscription, the snapshot -- which will always capture this
3-day-old backlog as long as the snapshot exists -- will
expire in 4 days. The service will refuse to create a
snapshot that would expire in less than 1 hour after
See [Creating and managing labels]