[hotfix] Add UID (hash) to Glossary

docs/content.zh/docs/concepts/glossary.md

@@ -137,3 +137,16 @@ TaskManager 是 [Flink Cluster](#flink-cluster) 的工作进程。[Task](#task)
 #### Transformation
 
 Transformation 应用于一个或多个数据流或数据集，并产生一个或多个输出数据流或数据集。Transformation 可能会在每个记录的基础上更改数据流或数据集，但也可以只更改其分区或执行聚合。虽然 [Operator](#operator) 和 [Function](#function) 是 Flink API 的“物理”部分，但 Transformation 只是一个 API 概念。具体来说，大多数（但不是全部）Transformation 是由某些 [Operator](#operator) 实现的。
+
+#### UID
+
+A unique identifier of an [Operator](#operator), either provided by the user or determined from the
+structure of the job. When the [Application](#flink-application) is submitted this is converted to
+a [UID hash](#uid-hash).
+
+#### UID hash
+
+A unique identifier of an [Operator](#operator) at runtime, otherwise known as "Operator ID" or
+"Vertex ID" and generated from a [UID](#uid).
+It is commonly exposed in logs, the REST API or metrics, and most importantly is how
+operators are identified within [savepoints]({{< ref "docs/ops/state/savepoints" >}}).

docs/content/docs/concepts/glossary.md

@@ -204,3 +204,16 @@ per-record basis, but might also only change its partitioning or perform an aggr
 [Operators](#operator) and [Functions](#function) are the "physical" parts of Flink's API,
 Transformations are only an API concept. Specifically, most transformations are
 implemented by certain [Operators](#operator).
+
+#### UID
+
+A unique identifier of an [Operator](#operator), either provided by the user or determined from the
+structure of the job. When the [Application](#flink-application) is submitted this is converted to
+a [UID hash](#uid-hash).
+
+#### UID hash
+
+A unique identifier of an [Operator](#operator) at runtime, otherwise known as "Operator ID" or
+"Vertex ID" and generated from a [UID](#uid).
+It is commonly exposed in logs, the REST API or metrics, and most importantly is how
+operators are identified within [savepoints]({{< ref "docs/ops/state/savepoints" >}}).