# Change History

Released On | Description
--- | ---
2021-09-02 | Modified the following content: Optimized Differences Between Dedicated and Shared Load Balancers.
2021-07-27 | Modified the following content: Added the descriptions about idle timeout for shared load balancers.
2021-06-10 | Modified the following content: Added the descriptions of session stickiness duration.
2021-05-27 | Modified the following content: Changed the name of enhanced load balancers to shared load balancers.
2021-05-20 | Modified the following content: Added the constraints on binding EIPs to dedicated load balancers in the eu-de region in Table 1.

2021-04-08

Modified the following content:

- Added a note to state that classic load balancers can no longer be created on the management console in Differences Between Classic and Shared Load Balancers, How ELB Works, Enabling or Disabling a Load Balancer, Load Balancing Algorithms, Sticky Session, HTTP Redirection to HTTPS, Is an EIP Exclusively Assigned to a Load Balancer?, What Are the Relationships Between Load Balancing Algorithms and Sticky Session Types?, How Does ELB Perform UDP Health Checks? What Are the Precautions for UDP Health Checks?, and What Types of Sticky Sessions Does ELB Support?.
- Changed Create Enhanced Load Balancer to Create Elastic Load Balancer in Using Shared Load Balancers — Entry Level.
- Deleted the procedure for adding a listener to a classic load balancer in Adding a Listener.
- Deleted the procedure and parameter descriptions for creating classic load balancers in Modifying or Deleting a Listener, Configuring Security Group Rules for Backend Servers (Shared Load Balancers), Configuring a Health Check, Disabling a Health Check, Tag, and How Do I Troubleshoot an Unhealthy Backend Server?
- Deleted section "Adding or Removing Backend Servers (Classic Load Balancers)".
- Added Adding or Removing Backend Servers (Dedicated Load Balancers).

2021-03-02

Modified the following content:

- Added a note to state that creating classic load balancers on the management console is no longer supported in What Is ELB?
- Deleted information about classic load balancers in Differences Between Dedicated and Shared Load Balancers.
- Deleted the links for jumping to the corresponding sections in Overview.
- Deleted the procedure and parameter descriptions for creating classic load balancers in Creating a Shared Load Balancer.
- Updated Table 1 in Overview.
- Added Adding a Listener to a Dedicated Load Balancer in Adding a Listener.
- Added dedicated load balancer and dedicated load balancer listener as the monitored object in Monitoring Metrics.
- Added information about the EIPs bound to dedicated load balancers in Is an EIP Exclusively Assigned to a Load Balancer?
- Added Table 2 in What Are the Relationships Between Load Balancing Algorithms and Sticky Session Types?
- Added the scenario for dedicated load balancers in How Do I Troubleshoot an Unhealthy Backend Server?
- Added sticky session types supported by dedicated load balancers in What Types of Sticky Sessions Does ELB Support?

2020-12-10 | Modified the following content: Added descriptions and operations of dedicated load balancers in Creating a Dedicated Load Balancer.
2020-05-30 | Modified the following content: Modified the descriptions and operations in Migrating from Classic Load Balancers to Shared Load Balancers.
2020-02-26 | Modified the following content: Added Security Policy. Modified the following content: Added the Security Policy parameter in Adding a Listener.

2019-07-30

Modified the following content:

- Added section "Regions and AZs".

2019-05-16

Modified the following content:

- Optimized chapter "Getting Started."
- Optimized chapters Load Balancer, Listener, Backend Server, Health Check, and Certificate and adjusted the content of each chapter.

2019-04-10 | Accepted in OTC-4.0/Agile-05.2019.
2019-04-01 | Modified the following content: Updated console screenshots.
2019-03-04 | Accepted in OTC 4.0/Agile.

2019-02-22

Modified the following content:

- Updated the TOA download path in Configuring the TOA Plug-in.
- Modified some parameters based on the latest console.
- Optimized the parameter tables and operations for adding listeners in Listener.

Added the following content:

- Added parameters for creating redirects in HTTP Redirection to HTTPS.

2019-02-19

Modified the following content:

- Modified the procedure for binding an EIP in section "Creating an Enhanced Load Balancer."

Added the following content:

- Added parameters Redirected To and Enable Health Check to the table that describes parameters for adding a listener to an enhanced load balancer in section "Creating an Enhanced Load Balancer."
- Added the procedure for unbinding an EIP in section "Creating an Enhanced Load Balancer."

- Added the procedure for modifying listeners in Listener.
- Added the procedure for modifying forwarding policies in Forwarding Policy.

2019-02-03

Modified the following content:

- Modified the operations related to enhanced load balancers and associated resources (including listener, backend server group, backend server, health check, forwarding policy, and certificate) based on the management console.
- Optimized the sections under Service Overview.
- Modified the parameter descriptions of enhanced load balancer listeners in sections "Creating an Enhanced Load Balancer", "Listener", and "Certificate".
- Changed OK to Yes in the procedures for deleting a load balancer, deleting a listener, removing a backend server, and deleting a certificate. Changed OK to Yes in some sections based on the latest console pages.
- Modified the operations and the parameters for configuring bucket access permissions in Access Logging.
- Removed Mutual Authentication from "FAQs" and placed it under "Management."

Added the following content:

- Added HTTP Redirection to HTTPS.
- Added Tag.
- Added ELB Components, Accessing ELB, and How ELB Works under "Service Overview".
- Added parameter Domain Name in Creating and Managing a Certificate.
- Added parameters Tag, Redirect, and Cookie Name in the tables of listener parameters in sections "Creating an Enhanced Load Balancer", Listener, and Certificate.

Deleted the following content:

- Deleted the content related to IP mode listeners in section "Creating an Enhanced Load Balancer."
- Deleted FAQ "How Can I Create a Listener in IP Mode?"
- Deleted "Basic Architecture" and "Features" from "Service Overview."

2018-11-30 | Modified the following content: Added the SNI related parameters for enhanced load balancers.
2018-07-20 | Modified the following content: Added the procedure for adding a listener.
2018-06-11 | Accepted in OTC 3.1.
2018-05-17 | Modified the following content: Deleted parameter Billing Mode.
2018-05-30 | This issue is the first official release.