You can call DescribeStream at a maximum rate of 10 times per second.
Each shard in the stream has a SequenceNumberRange
associated with it. If the SequenceNumberRange
has a StartingSequenceNumber
but no EndingSequenceNumber
, then the shard is still open (able to receive more stream records). If both StartingSequenceNumber
and EndingSequenceNumber
are present, then that shard is closed and can no longer receive more data.