klion26 commented on a change in pull request #8995:
FLINK-13106][doc-zh]Translate Parallel Execution page into Chinese
URL: https://github.com/apache/flink/pull/8995#discussion_r300851239
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File path: docs/dev/parallel.zh.md
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@@ -22,29 +22,20 @@ specific language governing permissions and limitations
under the License.
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-This section describes how the parallel execution of programs can be
configured in Flink. A Flink
-program consists of multiple tasks (transformations/operators, data sources,
and sinks). A task is split into
-several parallel instances for execution and each parallel instance processes
a subset of the task's
-input data. The number of parallel instances of a task is called its
*parallelism*.
-
-If you want to use [savepoints]({{ site.baseurl }}/ops/state/savepoints.html)
you should also consider
-setting a maximum parallelism (or `max parallelism`). When restoring from a
savepoint you can
-change the parallelism of specific operators or the whole program and this
setting specifies
-an upper bound on the parallelism. This is required because Flink internally
partitions state
-into key-groups and we cannot have `+Inf` number of key-groups because this
would be detrimental
-to performance.
+本节描述了如何在 Flink 中配置程序的并发执行。一个 Flink 程序由多个任务 task 组成（转换/算子、数据源和数据汇）。一个 task
包括多个并发执行的实例，且每一个实例都处理 task 输入数据的一个子集。一个 task 的并发实例数被称为该 task 的 *parallelism*。
+
+使用 [savepoints]({{ site.baseurl }}/zh/ops/state/savepoints.html) 时，应该考虑设置最大
parallelism。当作业从一个 savepoint 恢复时，你可以改变特定算子或着整个程序的 parallelism，并且此设置会限定整个程序的
parallelism 的上限。由于在 Flink 内部将状态划分为了 key-groups，且性能所限不能无限制地增加 key-groups ，因此设定最大
parallelism 是有必要的。
* toc
{:toc}
-## Setting the Parallelism
+## 设置 Parallelism
-The parallelism of a task can be specified in Flink on different levels:
+一个 task 的 parallelism 可以从多个层次指定：
-### Operator Level
+### 算子层次
-The parallelism of an individual operator, data source, or data sink can be
defined by calling its
-`setParallelism()` method. For example, like this:
+单个算子、数据源和数据流出的 parallelism 可以通过调用 `setParallelism()` 方法来指定。如下所示：
Review comment:
`数据流出` can be improved, and other places also
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