wuchong 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_r301503461
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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.
-->
-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*。
Review comment:
parallelism 如果特指参数的话，比如 `setConfig(int parallelism)`, 那么这里的 `parallelism`
不应该翻译。 但是本文中的 parallelism 不是特指 方法名、属性名，
是一个贯穿全文的概念，而这个概念是有通用的翻译的。现在没有翻译的时候，通读全文下来，个人觉得不是特别顺畅。 翻译了之后会更好理解。
之所以叫 并行度， 是因为 parallel 是并行的意思， concurrency 才是并发的意思。
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