title: Kinesis Firehose data delivery delays
body: <p>I'm using Kinesis Firehose to compress and save events to S3. The prefix format is YYYY/MM/DD/HH in UTC time.
  Those events sent to Firehose also contain a UTC time as a field. Using this field I discovered that YYYY/MM/DD/HH objects from S3 contain events also from its precedent and next hour. </p>
  
  <p>The buffer limits I'm using are 128MB/600s. </p>
  
  <p>Do you know if these are hard limits or there could be a chance to buffer events out of these limits ?</p>