Re-set up the cluster from the er server, which now ACTS as the new primary server of the cluster.

从ER服务器重新设置集群，ER服务器现在充当集群的新主服务器。

youdao

As the hadoop-0.20 is one of your primary interfaces to the hadoop cluster, you'll see this utility used quite a bit through this article.

因为hadoop - 0.20是hadoop集群的主要接口之一，您会看到本文中多次使用这个实用程序。

youdao

A cluster consists of one primary server and a mix of three different types of secondary servers.

一个集群包含有一个主服务器和三个不同类型的备用服务器。

youdao

The project utilises a cluster model to facilitate the linking, with a primary and secondary school cluster in each country.

UNESCO: UK Schools Featured in UNESCO Publication