这些技巧通常包括横向/纵向扩展和在一组服务器之间实现负载均衡。
These techniques typically involve horizontal and vertical scaling and load balancing across a set of servers.
这种新功能能够在主机之间迁移一组过程，这对均衡负载非常有用。
This new functionality is a step in the direction of migrating a set of processes between hosts, which can be very useful for load balancing.
一个典型的SaaS应用程序可能会允许通过一个负载均衡器访问一组应用服务器并连接到数据库服务器。
A typical SaaS application might have a set of application servers accessed through a load balancer and connected to a database server.
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