SaaS成熟度模型4级中租户负载均衡器的解释 [英] Explanation of Tenant Load Balancer in SaaS maturity model level 4

问题描述

我已经根据 Gianpaolo SaaS成熟度模型。

现在我对SaaS成熟度等级4感到困惑。它说，它有一个租户负载均衡器，动态调用一个新的应用程序实例来为一个负载均衡服务。 SaaS应用程序。

Right now I got confused about SaaS maturity level 4. It said, it has a "Tenant load balancer" that dynamically calls a new application instance to serve load balancing for a SaaS application.

我想知道这个租户负载均衡器的真正含义。我们如何在现实世界或应用服务器中实现这个租户负载均衡器？

I want to know what this "Tenant load balancer" really means. How do we implement this "Tenant load balancer" in the real world or in an application server?

任何人都可以给我一些很好的解释和示例，比如Java EE技术中的实现吗？

Can anyone give me some good explanation and an example, like an implementation in Java EE technology?

推荐答案

关键概念是具有负载平衡的水平可伸缩性。在较高的层次上，这类似于在SOA环境中使用的ESB /负载均衡器。

The key concept is horizontal scalability with load balancing. On a high level this is similar to an ESB/load balancer that is used in a SOA environment.

以下是租户负载均衡SAAS部署的一些属性：

Below are some of the properties of Tenant Load Balanced SAAS deployment:

1）正在运行多个SAAS软件实例。

1) More than one instance of the SAAS software is running.

2）租户调用该软件可以由任何实例处理。负载均衡器负责根据负载均衡策略将租户请求路由到其中一个实例。

2) Tenant calls to the software could be processed by any of the instances. The load balancer takes care of routing the tenant requests to one of the instances based on load balancing strategies.

3）可伸缩性：应该提供添加新实例的功能当负载增加超出当前实例可以提供的服务时，需要付出很少的努力。例如，在云环境中，可以启动新的EC2实例，并且可以在其上部署SAAS应用程序。负载均衡器可以将其他调用路由到此新实例。此方法也适用于非EC2环境。

3) Scalability: There should be provision to add a new instance with little effort when the load increases beyond what can be serviced by the current instances. For example, in a cloud environment a new EC2 instance can be started and the SAAS application can be deployed on it. The load balancer can route additional calls to this new instance. This approach applies to non EC2 environment also.

负载均衡器功能可由ESB本身或通过集成框架/硬件负载均衡器/软件负载平衡器提供。

The load balancer functionality could be provided by the ESB itself or via integration frameworks/hardware load balancer/software laod balancers.

负载平衡也适用于后端存储，类似于数据库，搜索索引存储等。这里是SAAS环境中数据库设置的一些信息，特别是负载平衡。

The load balancing applies to backend stores too like databases, search index stores etc. Here is some info on the database setup in a SAAS environment, not load balancing in particular.

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