"Salesforce低代码平台Force.com的多租户架构设计"

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Salesforce 低代码平台 Force.com 是一种强大的多租户架构设计，为企业提供了一个快速开发和部署互联网应用程序的平台。本文将详细介绍 Force.com 平台的多租户架构设计，包括其组成部分、核心概念和优势。 Force.com 平台的多租户架构设计基于云计算的概念，将不同的用户组织和用户数据进行隔离，使每个组织都能够拥有自己的自定义应用程序和数据。该平台通过虚拟化技术，将硬件资源和软件服务进行抽象，使用户能够根据自己的需求定制化开发和部署应用程序。 Force.com 平台的多租户架构包含以下几个关键组成部分：多租户数据库引擎、应用服务器、数据存储和元数据存储。多租户数据库引擎是 Force.com 平台的核心，它负责处理多个用户组织的数据隔离和访问控制。应用服务器负责接收用户请求并处理逻辑，将结果返回给用户。数据存储负责存储用户的数据，包括标准对象和自定义对象。元数据存储负责存储用户定义的应用程序的结构和逻辑。 Force.com 平台的多租户架构设计基于一些核心概念。首先是多租户隔离，在 Force.com 平台中，每个用户组织的数据都是相互隔离的，不同用户组织之间的数据不会相互影响。其次是共享架构，所有的用户组织共享同样的硬件和软件资源，使资源利用率得到了最大化。再者是可伸缩性，Force.com 平台能够根据用户的需求实时扩展和缩减资源，以满足用户的增长需求。 Force.com 平台的多租户架构设计有许多优势。首先是降低开发和维护成本，Force.com 平台提供了丰富的开发工具和组件，使开发人员能够快速构建和部署应用程序。其次是提高应用程序的安全性，Force.com 平台通过严格的访问控制和数据隔离机制，保障了用户数据的安全性。再者是提高用户体验，Force.com 平台提供了可定制的用户界面和丰富的功能，使用户能够根据自己的需求定制化使用应用程序。总结来说，Salesforce 低代码平台 Force.com 的多租户架构设计是一种强大而灵活的云计算架构，为企业提供了快速开发和部署互联网应用程序的平台。通过多租户隔离、共享架构和可伸缩性等核心概念，该平台能够降低开发和维护成本，提高应用程序的安全性和用户体验。未来，随着云计算的不断发展，Force.com 平台的多租户架构设计将继续在企业应用领域发挥重要作用。

WHITEPAPER

The Force.com Multitenant Architecture: Understanding the Design of Salesforce.com’s Internet Application Development Platform2

Abstract

Force.com is the preeminent on-demand application development platform in use today,

supporting some 47,000+ organizations. Individual enterprises and commercial software-as-a-

service (SaaS) vendors trust the platform to deliver robust, reliable, Internet-scale applications.

To meet the extreme demands of its large user population, Force.com’s foundation is a metadata-

driven software architecture that enables multitenant applications. is paper explains the patented

technology that makes the Force.com platform fast, scalable, and secure for any type of application.

Introduction

History has shown that every so often,

incremental advances in technology and

changes in business models create major

paradigm shifts in the way software

applications are designed, built, and delivered to

end users. e invention of personal computers

(PCs), computer networking and graphical

user interfaces (UIs) gave rise to the adoption

of client/server applications over expensive,

inﬂexible, character-mode mainframe

applications. And today, reliable broadband

Internet access, service-oriented architectures

(SOAs), and the cost ineﬃciencies of managing

dedicated on-premises applications are

driving a transition toward the delivery of

decomposable, managed, shared, Web-based

services called software as a service (SaaS).

With every paradigm shift comes a new set of

technical challenges, and SaaS is no diﬀerent.

Yet existing application frameworks are not

designed to address the special needs of

SaaS. is void has given rise to another new

paradigm shift, namely platform as a service

(PaaS). Hosted application platforms are

managed environments speciﬁcally designed to

meet the unique challenges of building SaaS

applications and deliver them more cost-

eﬃciently than ever before.

e focus of this paper is multitenancy,

a fundamental design approach that can

dramatically help improve the manageability

of SaaS applications. is paper deﬁnes

multitenancy, explains the beneﬁts of

multitenancy, and demonstrates why metadata-

driven architectures are the premier choice for

implementing multitenancy. After these general

introductions, the bulk of this paper explains

the technical design of Force.com, the world’s

ﬁrst PaaS, which delivers turnkey multitenancy

for Internet-scale applications. e paper details

Force.com’s patented metadata-driven architecture

components to provide an understanding of

the features used to deliver reliable, secure, and

scalable multitenant applications.

Multitenant Applications

To decrease the cost of delivering the same

application to many diﬀerent sets of users,

an increasing number of applications are

multitenant rather than single-tenant. Whereas

a traditional single-tenant application requires

a dedicated set of resources to fulﬁll the

needs of just one organization, a multitenant

application can satisfy the needs of multiple

tenants (companies or departments within a

company, etc.) using the hardware resources and

staﬀ needed to manage just a single software

instance (Figure 1).

Figure 1: A multitenant application cost-eﬃciently shares

a single stack of resources to satisfy the needs of multiple

organizations.

Tenants using a multitenant service operate

in virtual isolation from one another:

Organizations can use and customize an

application as though they each have a separate

instance, yet their data and customizations

remain secure and insulated from the activity of

all other tenants. e single application instance

eﬀectively morphs at runtime for any particular

tenant at any given time.

Multitenancy is an architectural approach that

pays dividends to both application providers

and users. Operating just one application

instance for multiple organizations yields

tremendous economy of scale for the provider.

Only one set of hardware resources is necessary

to meet the needs of all users, a relatively

small, experienced administrative staﬀ can

eﬃciently manage only one stack of software

and hardware, and developers can build and

support a single code base on just one platform

(operating system, database, etc.) rather than

many. e economics aﬀorded by multitenancy

allow the application provider to, in turn,

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