This topic describes the release notes of ECS features.

For information about release notes of images, see Release notes. For information about release notes of Server Migration Center, see the Update history section in Server Migration Center.

September 2019

Feature Description Release date Supported region Documentation
Snapshot The quota of manual snapshot and automatic snapshot have been lifted to 256 respectively. September 2, 2019 All Snapshot overview

June 2019

Feature Description Release date Supported region Documentation
Redeploy an instance This feature enables you to redeploy your ECS instance by calling the RedeployInstance operation when the instance receives a system event notification. June 12, 2019 All RedeployInstance

May 2019

Feature Description Release date Supported region Documentation
Cloud Assistant This feature allows you to set custom parameters when you create Cloud Assistant commands through the console or by calling API operations. You can specify the values of those parameters when calling those commands. May 15, 2019 All
Block Storage This feature allows you to create subscription disks by calling API operations. May 15, 2019 All CreateDisk
Event notifications This feature allows you to configure CloudMonitor event notifications for manually created snapshots. May 10, 2019 All Overview of event notifications

April 2019

Feature Description Release date Supported region Documentation
Elastic Network Interface (ENI) A single ENI supports multiple private IP addresses. April 28, 2019 All Assign a secondary private IP address
Block Storage System disk resizing is supported. April 24, 2019 All Resize cloud disks offline
Snapshots Snapshots of expired disks can be created. April 20, 2019 All

March 2019

Feature Description Release date Supported region Documentation
Public images Public image Aliyun Linux 2 is released. March 27, 2019 All Aliyun Linux 2
Instance families gn6i, compute optimized instance family with GPUs, is released. March 21, 2019 All Instance families
Instance families sccgn6, compute optimized Super Computing Cluster (SCC) instance family with GPUs, is released. March 20, 2019 All Instance families
Instance families vgn5i, light-weight compute optimized instance family with GPUs, is released. March 19, 2019 All Instance families
Reserved instances The reserved instance feature is released. March 18, 2019 All RI overview

January 2019

Feature Description Release date Supported region Documentation
Event notifications Status change events and alert events for recycling preemptible instances are supported. January 29, 2019 All System events

December 2018

Feature Description Release date Supported region Documentation
Cloud Assistant Cloud Assistant supports the UK (London) region. December 31, 2018 All Cloud assistant overview
Preemptible instances Preemptible instance bills are accurate to the second. December 17, 2018 All Preemptible instances
Instances Instance release protection is supported. December 14, 2018 All Enable instance release protection
Elastic Network Interface (ENI) You can call the DescribeNetworkInterfaces API operation to query the public IP address that is attached to an ENI. December 4, 2018 All DescribeNetworkInterfaces

November 2018

Feature Description Release date Supported region Documentation
Custom images Custom images can be created through Packer. November 30, 2018 All Use Packer to create a custom image
Instance families re4e, memory optimized instance family with enhanced performance, is released. November 30, 2018 All Instance families
Block Storage Subscription disks can be created separately and attached to a subscription instance. November 29, 2018 All Create a subscription disk
Deployment set Alibaba Cloud deployment sets are released. November 16, 2018 All Deployment set

October 2018

Feature Description Release date Supported region Documentation
Instance families f3, compute optimized instance family with FPGAs, is released. October 31, 2018 All Instance families
API best practices API best practices for the console are released. October 19, 2018 All Create an instance by using the wizard

September 2018

Feature Description Release date Supported region Documentation
Burstable performance instances (t5) Burstable performance instances support the unlimited mode. September 30, 2018 All Unlimited mode
Instance metadata Instance metadata supports O&M system events. September 14, 2018 All Metadata
Instance health status Health status of ECS instances is displayed on the instance details page. September 14, 2018 All View instance health status
Instance families The new generation GPU cloud host GN6 (V100 model) is released. September 12, 2018 All Instance families
Instance purchase Batch renewal of instances and batch purchase of historical instances are supported. September 7, 2018 All Manual renewal
System events API operations that are used to create or cancel simulated system events are released. September 3, 2018 All
Billing methods You can switch the billing method of an instance from subscription to pay-as-you-go. September 1, 2018 All Switch the billing method from subscription to pay-as-you-go.

August 2018

Feature Description Release date Supported region Documentation
Local disks The O&M of instances to which local disks are attached is optimized. August 31, 2018 All Local disks
Cloud Assistant Cloud Assistant is supported in the ECS console. August 17, 2018 All Cloud Assistant overview
Instance families Super Computing Cluster (SCC) is released. August 16, 2018 All What is a Super Computing Cluster?

July 2018

Feature Description Release date Supported region Documentation
Custom images Images in the qcow2 format can be imported. July 30, 2018 All
Security groups Security group rules can be modified. July 25, 2018 All Modify security group rules
Tags Instances can be tagged when being created. July 20, 2018 All Add a tag to resources
Instance families ebmc4, compute optimized ECS Bare Metal Instance family, is released. July 18, 2018 All Instance families
Snapshots The estimated remaining time for creating snapshots can be displayed. July 17, 2018 All Create a snapshot
Account and user privileges Quota management is supported. July 15, 2018 All Manage privileges and quotas
Enhanced SSDs Enhanced SSDs (under public preview) are available in Beijing Zone G. July 14, 2018 All Cloud disk overview
Instance troubleshooting System logs and screenshots can be viewed. July 13, 2018 All Console output and screenshot
Security groups You can submit a ticket to modify the maximum number of instances that can be added in a security group and the maximum number of security group rules. July 10, 2018 All Limits
Instance families ic5, compute optimized instance family, is released. July 9, 2018 All Instance families

June 2018

Feature Description Release date Supported region Documentation
Public images You can select an OS such as Red Hat from public images to create ECS instances. June 29, 2018 All Create an instance by using the wizard
Instance upgrade Pay-as-you-go instances can be upgraded or downgraded across instance families. June 15, 2018 All Instance families that support instance upgrades
Billing methods Subscription instances can be renewed on a weekly basis. June 12, 2018 All Manual renewal
Security groups Security groups in a classic network can be cloned to a VPC in one click. June 6, 2018 All Clone a security group
Active O&M Phase II of active O&M is released. June 1, 2018 All System events

May 2018

Feature Description Release date Supported region Documentation
Custom images The image compliance tool is released. May 28, 2018 All Image compliance tool
System events ECS system events are migrated to CloudMonitor and can be queried. May 25, 2018 All System events
Launch templates The ECS instance launch template is released. May 11, 2018 All Create a launch template

April 2018

Feature Description Release date Supported region Documentation
Billing methods You can switch the billing method of an instance from pay-as-you-go to subscription. April 23, 2018 All Switch from Pay-As-You-Go to Subscription billing
Instance upgrade Subscription ECS instances can be renewed and upgraded or downgraded after expiration. April 13, 2018 All Renew for configuration downgrade

March 2018

Feature Description Release date Supported region Documentation
GPU instances The NGC GPU-accelerated container is supported. March 28, 2018 All Deploy an NGC on gn5 instances
System events The system event feature is released. March 26, 2018 All System events
ECS Bare Metal Instance ECS Bare Metal Instance is released. March 14, 2018 All What is an ECS Bare Metal Instance?
Instance identity The ECS instance identity feature is released. March 1, 2018 All Instance identity

February 2018

Feature Description Release date Supported region Documentation
ECS API operations The API operation that is used to check whether ECS instances can be upgraded or downgraded is released. February 10, 2018 All DescribeResourcesModification
Subscription instances The number of expiration days of a subscription instance prior to instance release is extended from 7 days to 15 days. February 7, 2018 All Subscription
ECS API operations The API operation that is used to create and query resources is released. February 2, 2018 All DescribeAvailableResource

December 2017

Feature Description Release date Supported region Documentation
No fees for stopped instances (VPC-Connected) The No fees for stopped instances (VPC-Connected) feature is supported for pay-as-you-go instances. December 14, 2017 All No fees for stopped VPC instances
Elastic Network Interface (ENI) The ENI feature is released. December 8, 2017 All ENI overview
Instance family with FPGAs f1, compute optimized instance family with FPGAs, is released. December 2, 2017 All Instance families
ECS API operations The API operation that is used to create multiple instances at a time is released. December 1, 2017 All RunInstances
Instance troubleshooting The ECS console supports real-time diagnostics. December 1, 2017 All Self-diagnostic system

November 2017

Feature Description Release date Supported region Documentation
Server Migration Center Server Migration Center is released. November 27, 2017 All Cloud Migration tool
Security group rules Security group rules can be imported and exported. November 23, 2017 All Manage security group rules
Subscription instances Subscription instances can have the auto-renewal function disabled. November 23, 2017 All ModifyInstanceAutoRenewAttribute
Billing methods Weekly subscription instances can be created and renewed by calling API operations. November 3, 2017 All CreateInstance
Instance RAM roles RAM roles can be assigned to ECS instances. November 1, 2017 All What is the RAM role of an instance

October 2017

Feature Description Release date Supported region Documentation
Elastic IP Address (EIP) The public IP address of an instance in a VPC can be converted to an EIP. October 31, 2017 All Convert an ECS public IP address to an EIP
Preemptible instances Preemptible instances are released. October 18, 2017 All Preemptible instances
Burstable performance instances (t5) t5 burstable performance instances are released. October 9, 2017 All Overview

September 2017

Feature Description Release date Supported region Documentation
Billing methods Bills of pay-as-you-go instances and disks are accurate to the second. Bills are generated every hour. September 29, 2017 All Pay-as-you-go
Instance family gn5i gn5i, compute optimized instance family with GPUs, is released, which is applicable to deep learning and online reasoning scenarios. September 23, 2017 All Instance families
ECS disk encryption ECS disks can be encrypted. September 5, 2017 All ECS disk encryption

August 2017

Feature Description Release date Supported region Documentation
Security group rules Security group rules can be configured based on the 5-tuple. August 31, 2017 All Security group quintuple rules
ClassicLink Instances in a classic network can be connected with instances in a VPC through ClassicLink. August 25, 2017 All Network types
Instance families The new-generation high speed ECS instances and local SSD instances that are equipped with the Skylake processor and support 25 GE networks are released. August 22, 2017 All Instance families
ECS API operations The bandwidth of instances can be changed by calling API operations. August 17, 2017 All ModifyInstanceNetworkSpec
Custom images Custom images can be imported. August 10, 2017 All Import custom images

July 2017

Feature Description Release date Supported region Documentation
Security groups You can isolate instances in a security group by configuring a security group rule. July 7, 2017 All Isolation of instances within a security group

June 2017

May 2017

Feature Description Release date Supported region Documentation
Instance RAM roles API operations that are used to manages RAM roles of instances are released. May 26, 2017 All Use the instance RAM role by calling APIs
Instance families Network-optimized instances are released. May 23, 2017 All Instance families
Instance families d1, storage optimized instance family, is released. May 12, 2017 All Instance families
Security groups The default security group policy is modified to expose only ICMP ports, TCP port 22, and TCP port 3389. May 11, 2017 All Default rules of the default security group
Security groups Security groups can be backed up, overwritten, and restored. May 10, 2017 All Restore security group rules

April 2017

Feature Description Release date Supported region Documentation
SSH key pairs SSH key pairs are released. April 25, 2017 All SSH key pair overview

February 2017

Feature Description Release date Supported region Documentation
Custom images The cloud-init tool supports some custom images. February 24, 2017 All Install cloud-init for Linux images
Instance families i1, I/O optimized instance family with local SSDs, is released. February 17, 2017 All Instance families
Snapshots The system disk snapshot can be used to create data disks. February 15, 2017 All Create a disk by using a snapshot
Instance families gn4, compute optimized instance family with GPUs, is released. February 14, 2017 All Instance families

January 2017

Feature Description Release date Supported region Documentation
Instance families ga1, compute optimized instance family with GPUs for visualization computing, is released. January 24, 2017 All Instance families
Instance families se1, memory optimized instance family, is released. January 21, 2017 All Instance families

2016

Feature Description Release date Supported region Documentation
Snapshots Snapshot 2.0 is released. March 15, 2016 All Snapshot overview
Disk resizing The system disk resizing feature is released. January 15, 2016 All Resize cloud disks offline

2015

Feature Description Release date Supported region Documentation
Custom images The image import feature is released. December 15, 2015 All Notes for importing images
Security groups Security groups are supported in the ECS console. November 2, 2015 All Create a security group
Image market The Marketplace images are commercially available. September 2, 2015 All Marketplace images
Tags The tag feature is released. August 20, 2015 All Tag overview
System disks The operating system of pay-as-you-go instances can be changed. August 13, 2015 All Replace the system disk by using a public image
Custom images Images can be shared to other users. May 15, 2015 All Share custom images
Disk resizing Disks can be resized offline. April 20, 2015 All Overview
Custom images The image copying feature is released. January 26, 2015 All Copy custom images

2014

Feature Description Release date Supported region Documentation
Block Storage Pay-as-you-go disks are released. August 22, 2014 All What is Block Storage?