hdfs 复制因子 修改

Now, I have a running HDFS storing lost . I want to change its replication factor.

现在，我有一个正在运行的HDFS 用于存储丢失的 。 我想更改其复制因子。

How to change it? What will happen after it is changed?

怎么改变呢？ 更改后会发生什么？

For example, I change from 2 to 3. Will HDFS automatically re-replicate the data chunks?

例如，我从2更改为3。HDFS是否会自动重新复制数据块？

First, the replication factor is client decided.

首先，复制因素是客户决定的。

Second, the replication factor is per-file configuration.

其次，复制因素是每个文件的配置。

Hence, the configuration only changes the client and takes effect for new files.

因此，该配置仅更改客户端，并对新文件生效。

For existing files, you need to manually re-set the replication factor:

对于现有文件，您需要手动重新设置复制因子：

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hdfs 复制因子 修改