About QoS Policies

Provides a brief overview of the QoS Policy solution.

About Policies Managing Policies

Table of Contents

  1. Introduction
  2. Service Level Policies
  3. Quota Management Policies
  4. Auditing Policies

Introduction

QoS (Quality of Service) policies are used to define metrics of requirements for ensuring service availability, performance, integrity, and reliability. QoS policies can be attached to Organization, Services, Operations, and Contracts via the Policies Attachment Portlet.

For more information and use cases on each policy type, refer to QoS Policies.

QoS policies are organized into the following categories:

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Service Level Policies

You can use Service Level Policies to define conditions for measuring and reporting performance of a specific contract.

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Quota Management Policies

You can use Quota Management Policies to protect your web services from intentional or unintentional overuse. The Quota Management Policy solution:

  • Allows API providers to specify maximum quotas for each contracted user of the service.
  • Allows you to specify quotas as number of transactions:
    • Per second
    • Per day
    • Per week
    • Per month
  • Enforces quotas for each contract, denying any transactions over and above the quota in the specified period. For example, if the quota is 50tps, once 50 transactions have been processed within the last second, any more transaction requests within the last second will be denied with an HTTP 403 for RESTful services, or an appropriate SOAP fault.
  • Allows you to specify performance optimization policies that define actions the system will take in the event of particular conditions. For example, you could define the policy to reduce all quotas for all consumers to "emergency" levels when a particular SLA threshold is reached.

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Auditing Policies

You can use Auditing Policies to perform basic or detailed auditing of messages and record the message metrics in the Monitoring > Logs tab.

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