# 一、场景

[En]

Be careful to do it when you are in decommisstion in progress status.

[En]

Add custom parameters to the interface:

dfs.namenode.replication.max-streams

dfs.namenode.replication.work.multiplier.per.iteration

dfs.namenode.replication.max-streams-hard-limit


[En]

The value should be greater than or equal to dfs.namenode.replication.max-streams

[En]

The default parameter is 2-4-2, which can be changed to 10-20-5

[En]

Test 2w blocks (about 15G), speed up 4-5 times

[En]

If the value of the production environment is modified too much, it will affect the network and cause other batch runs to have an impact.

Original: https://www.cnblogs.com/wang3680/p/16333091.html
Author: Tim&Blog
Title: hdfs节点退役如何加快副本迁移速度

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