title: How does Ordering Nodes Synchronization work?
body: <p>How can adding a new orderer download the ledger as ordering nodes are not connected with each other and kafka keeps messages only for 7 days.</p>
  
  <p>And also if I shut down a orderer node for more than 7 days and if I bring it up again then it will not find the transactions that happened in those 7 days in kafka partition therefore how will it sync and update it's local ledger.</p>