diff --git a/datacenter/ucp/2.2/guides/admin/install/system-requirements.md b/datacenter/ucp/2.2/guides/admin/install/system-requirements.md index 3e9ed4d66f..8e661c6b0e 100644 --- a/datacenter/ucp/2.2/guides/admin/install/system-requirements.md +++ b/datacenter/ucp/2.2/guides/admin/install/system-requirements.md @@ -73,6 +73,14 @@ to communicate before they time out. | RethinkDB | 10000 | no | | Stand-alone swarm | 90000 | no | +## Time Synchronization + +In distributed systems like Docker UCP, time synchronization is critical +to ensure proper operation. As a best practice to ensure consistency between +the engines in a UCP swarm, all engines should regularly synchronize time +with a Network Time Protocol (NTP) server. If a server's clock is skewed, +unexpected behavior may cause poor performance or even failures. + ## Compatibility and maintenance lifecycle Docker EE is a software subscription that includes three products: