# Change History

Released On | Description
--- | ---
2022-09-06 | The release incorporates the following changes: Optimized keywords.

2021-10-20

This release incorporates the following changes:

Modified the following content:

- Optimized the description of AS group parameters in sections Creating an AS Group Quickly and Creating an AS Group.
- Optimized the description of AS configuration parameters in sections Creating an AS Configuration from an Existing ECS Instance and Creating an AS Configuration from a New Specifications Template.

2020-10-19 | This release incorporates the following changes: Added section "Access Methods".
2019-04-18 | Accepted in OTC-4.0/Agile-05.2019.

2019-04-09

Added the following content:

- Added viewing historical scaling actions in Viewing a Scaling Action.
- Added link from AS and Other Services to Scheduled Scaling.

Modified the following content:

Modified description of parameter Enterprise Project in Creating an AS Group Quickly.

2019-02-28

Added the following content:

- Added description of parameter Enterprise Project.
- Added Overview.
- Added Creating an AS Policy.
- Added Managing a Bandwidth Scaling Policy.
- Added execution of a bandwidth scaling policy in Managing a Bandwidth Scaling Policy.

Modified the following content:

- Optimized content about the AS policy and bandwidth scaling policy.
- Optimized Dynamic Scaling and Scheduled Scaling.
- Modified descriptions and pictures in What Is Auto Scaling?
- Presented the relationship between services in a table in AS and Other Services.
- Modified the method for viewing a scaling action in Viewing a Scaling Action.
- Modified the link from Creating an AS Group to Creating an AS Policy.

Deleted the following sections:

- Enabling a Bandwidth Scaling Policy
- Disabling a Bandwidth Scaling Policy
- Modifying a Bandwidth Scaling Policy
- Deleting a Bandwidth Scaling Policy

2019-01-31

Modified the following content:

- Organized FAQs by category.
- Added FAQs What Is the Expected Number of Instances?, What Operations Will Be Suspended If an AS Group Is Disabled?, Why Instances in an AS Group Keep Failing Health Checks and Getting Deleted and Recreated?, What Are the Conditions to Trigger an Alarm-based AS Policy?, and Do I Need to Configure an EIP in an AS Configuration When a Load Balancer Has Been Enabled for an AS Group?
- Optimized FAQs How Can I Automatically Deploy My Application on an Instance? and What Is a Cooldown Period and Why Is It Required?

2018-09-14 | Accepted in OTC-3.2.

2018-08-30

Modified the following content:

- The cooldown period starts after a scaling action is complete and the default cooldown period is 300 seconds.
- Added FAQ "What Is a Cooldown Period? How Is It Calculated?"
- Added the application scenarios of the scaling bandwidth in Bandwidth Scaling.
- Optimized values of parameter EIP in Creating an AS Configuration from an Existing ECS Instance and Creating an AS Configuration from a New Specifications Template.
- Optimized some UI strings and operation steps.

2018-08-21 | Modified the following content: Optimized content in Setting Up an Automatically Scalable Discuz! Forum, Creating an AS Group Quickly, Dynamic Scaling, Creating a Bandwidth Scaling Policy, and Health Check.

2018-07-30

Modified the following content:

- Added the bandwidth scaling feature.
- Added parameter Security Group to "Using a New Template to Create an AS Configuration".
- Added FAQ "Will the Data on an Instance Be Retained After the Instance Is Removed from an AS Group and Deleted?"
- Added 10s and 1 min as new options for the health check interval in Creating an AS Group.

2018-06-30

Modified the following content:

- Added FAQ "What Can I Do If an AS Policy Fails to Be Enabled?"
- Added FAQ "How Do I Prevent ECSs in an AS Group from Being Removed Automatically?"

2018-05-30

Modified the following content:

- Added "View Audit Logs" to Recording AS Resource Operations.
- Added Monitoring Metrics.
- Added Viewing Monitoring Metrics.
- Added Setting Monitoring Alarm Rules.
- Added FAQ "What Can I Do If the AS Group Fails to Be Enabled?"
- Added FAQ "How Should I Handle Unhealthy Instances in an AS Group?"

2018-04-30

Modified the following content:

- Added FAQ "How Do I Delete an ECS Created in a Scaling Action?"

2018-03-30

Modified the following content:

- Optimized description of the instance health check.

2018-01-30

Modified the following content:

- Added description of forcible AS group deletion.
- Added description of classic and enhanced ELB.

2017-11-30

Modified the following content:

- Added AS metrics.
- Added the function of expanding or reducing the number of instances in an AS group according to the percentage preset in the AS policy.

2017-09-30

Modified the following content:

- Added a section for instance protection.
- Added a section for best practices.

2017-07-30

Modified the following content:

- Optimized the wizard-based AS group creation process. You must create or use an existing AS configuration after creating an AS group.
- Added Change AS Configuration in the More drop-down list and View AS Policy in the Operation column on the AS Groups page.
- Added the function of marking AS groups and instances.
- Optimized "Creating an AS Group Quickly" and "Creating an AS Group".
- Supported multiple projects.

2017-03-30 | Added the following content: User permissions

2017-01-20

Added the following content:

- Added license type selection during AS configuration creation.
- Supported private image encryption and optional data disk encryption as well as encryption mode configuration during AS configuration creation.

2016-12-30

Added the following content:

- Added parameter EIP for configuring an AS configuration.
- Added parameter AZ for configuring an AS group.

2016-10-19 | Added the following content: Added Cloud-Init.
2016-07-15 | Added the following content: Added the image type: shared image.
2016-03-14 | This issue is the first official release.