Elastic Compute Service:Economical mode

Conditions for enabling economical mode

ECS instances that meet the following conditions support economical mode:

• The instances reside in virtual private clouds (VPCs).

  You can migrate ECS instances from the classic network to VPCs. For more information, see Migrate ECS instances from the classic network to a VPC.

• The instances are pay-as-you-go or preemptible instances.

  You can change the billing method of ECS instances from subscription to pay-as-you-go. For more information, see Change the billing method of an instance from subscription to pay-as-you-go.

• The instance families are not equipped with local storage.

  Instance families that are equipped with local storage do not support economical mode, such as big data instance families and instance families that use local SSDs. For more information, see the Local storage (GiB) column in Overview of instance families.

• The instance families are not equipped with persistent memory.

  Instance families that are equipped with persistent memory do not support economical mode, such as re6p and re6p-redis instance families. For more information, see the Persistent memory (GiB) column in Overview of instance families.

You can enable or disable economical mode. For more information, see the Enable economical mode for your entire account and Disable economical mode for your entire account sections of this topic.

Supported resources

• When ECS instances are stopped in economical mode, the resources that support economical mode are recycled and no longer incur charges. The following ECS resources support economical mode:

  • Computing resources, including vCPUs and memory. The GPUs, FPGAs and NPUs of heterogeneous computing instances also support economical mode and can be recycled.

  • Auto-assigned public IP addresses and public bandwidth.

• When ECS instances are stopped in economical mode, the resources that do not support economical mode are retained and continue to be billed based on the pay-as-you-go billing method. ECS resources that do not support economical mode include but are not limited to the following resources:

  • System disks

  • Data disks

  • Elastic IP addresses (EIPs) and EIP bandwidth

  • Images

  • Snapshots

Conditions for triggering economical mode

Risks

If an instance is stopped in economical mode, the computing resources (vCPUs and memory) and auto-assigned public IP address of the instance are recycled and no longer incur charges. However, the following risks exist:

• After the computing resources (vCPUs and memory) are recycled, the instance may fail to be restarted due to insufficient resources. If the preceding issue occurs, try again later or change the instance to another instance type. For more information, see Change the instance type of a pay-as-you-go instance.

  Note

  Before you stop an instance in economical mode, we recommend that you restart the instance to ensure that sufficient resources are available for the instance to start and prevent service interruptions that are caused by instance startup failures.

• When the instance is restarted, a new public IP address is automatically assigned to the instance and may be different from the previous auto-assigned public IP address that is recycled. The private IP address of the instance remains unchanged.

  Note

  If your application depends on a specific public IP address, we recommend that you disable economical mode or convert the auto-assigned public IP address into an EIP. For more information, see the Disable economical mode for your entire account section of this topic or Convert the public IP address of an instance in a VPC to an EIP.

• If the instance is a burstable instance, the instance stops earning CPU credits and the CPU credit balance is cleared. When you restart the instance, the instance starts earning CPU credits again. For more information about CPU credits of burstable instances, see the "CPU credits" section of Overview.

Enable economical mode for your entire account

This section describes how to enable economical mode for all instances in all regions within your account. After you enable economical mode for your entire account, you can set the stop mode for individual instances when you stop the instances. For more information, see the Set the stop mode for a single instance section of this topic.

1. Log on to the ECS console.

2. In the Overview section of the Overview page, click Custom Settings.

   

3. Turn on Economical Mode.

4. In the message that appears, read the notes and click OK in the lower part.

5. Click OK.

Disable economical mode for your entire account

This section describes how to disable economical mode for all instances in all regions within your account. After you disable economical mode for your entire account, you can set the stop mode for individual instances when you stop the instances. For more information, see the Set the stop mode for a single instance section of this topic.

If an instance is stopped in economical mode, the computing resources (vCPUs and memory) and auto-assigned public IP address of the instance are recycled. Even if you disable economical mode, no computing resources incur charges for the instance. The instance is re-allocated computing resources and may have a different public IP address when the instance is restarted.

1. Log on to the ECS console.

2. In the Overview section of the Overview page, click Custom Settings.

   

3. Turn off Economical Mode.

4. In the message that appears, read the notes and click OK.

5. Click OK.

Set the stop mode for a single instance

After you enable or disable economical mode for your entire account, you can set the stop mode for an instance when you stop the instance. For more information, see Stop an instance.

View the stop mode of an instance

After a pay-as-you-go instance is stopped, you can check whether economical mode is triggered for the instance in the ECS console. On the Instances page, click the icon. In the Instance List Settings dialog box, select Stop Mode to show the Stop Mode column. View the stop mode of the instance.

• Standard Mode indicates that economical mode is not triggered.

• Economical Mode indicates that economical mode is triggered.

Note

After you set Stop Mode to Economical Mode (Formerly Known as No Fees for Stopped Instances Mode) to stop an instance, Standard Mode may be displayed in the Stop Mode column corresponding to the instance on the Instances page. This is because the process of stopping the instance in economical mode is incomplete. We recommend that you view the stop mode of the instance at a later point in time.

FAQ

• Can I retain the computing and network resources of a stopped pay-as-you-go instance after I enable economical mode?

• Can economical mode be triggered for ECS instances that are stopped from within their operating systems?

• Do instances that are equipped with local storage support economical mode?

• When I called the StartInstance operation to start an instance in economical mode, an OperationDenied.NoStock error was reported. Why?

• When I stopped an instance, I set Stop Mode to Economical Mode (Formerly Known as No Fees for Stopped Instances Mode). Then, the instance was stopped in economical mode. When I started the stopped instance, the public IP address of the instance changed. How do I prevent the IP address from changing?

References

You can use the scheduled startup and shutdown feature of Operation Orchestration Service (OOS) to batch manage the startup and shutdown time of multiple ECS instances. You can use the feature together with economical mode to reduce costs. For more information, see Scheduled startup and shutdown.