In some cases, they can also be used to satisfy read requests to offload the primary shard.
在某些情况下，它们可以用来满足读取请求卸载主碎片。
Replica shards are backup copies of all the data in the primary shard, and their main purpose is to recover from a primary shard failure to provide high availability.
复制碎片是主碎片中所有数据的备份副本，它们的主要目的是从主碎片失败中恢复，提供高可用性。
For the primary shards, the surviving replica shard is promoted to a primary shard, and new replica shards are created on the other server by copying data from the newly promoted primary.
对于主碎片，存活的复制碎片将提升为主碎片，并在另一个服务器上创建新的复制碎片——从新提升的主碎片复制数据。
The other 51 replica shards are also moved to the second container so that you have balance, and, for each shard, its primary and replica are in separate containers.
另外51个复制碎片也移动到第二个容器以便平衡，对于每个碎片，它的主碎片和复制碎片都位于不同的容器中。
To ensure fault tolerance and high availability, WebSphere eXtreme Scale shard distribution algorithms ensure that the primary and replica shards are never in the same container.
为了确保容错和高可用性，WebSphereeXtremeScale碎片分布算法确保主碎片和复制碎片绝不会位于同一个容器中。
To ensure fault tolerance and high availability, WebSphere eXtreme Scale shard distribution algorithms ensure that the primary and replica shards are never in the same container.
为了确保容错和高可用性，WebSphereeXtremeScale碎片分布算法确保主碎片和复制碎片绝不会位于同一个容器中。
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