Here are some answers to some frequently asked questions.
- How quickly will PowerDown check my cloud configuration?
- How often will PowerDown rescan my cloud configuration?
- Does PowerDown support AWS EC2 Auto Scale?
- How does PowerDown compare with AWS SpotFleet?
- Why are my Projected Savings Zero?
- How long is the PowerDown evaluation trial period?
- How much does PowerDown cost?
- If I power down a resource for a long time, will I keep being charged?
- Can I use Terraform with PowerDown?
- How can I change my password?
- How do I cancel my account?
How quickly will PowerDown check my cloud configuration?
After creating your account, PowerDown will immediately start scan your account in all regions. Depending on the scale of your account, this may take a few seconds or a couple of minutes to complete. When complete, you can see the record of the scan under your Alert Scans.
How often will PowerDown rescan my cloud configuration?
Rather than polling your cloud account, PowerDown uses CloudWatch events to be informed of changes to your cloud account. This is event-based approach much more efficient than polling and will use fewer cloud API calls.
You can force a manual rescan by editing and then saving a cloud credential Edit Cloud.
Does PowerDown support AWS EC2 Auto Scale?
Yes, PowerDown will manage servers that are created via AWS Auto Scale. When new instances are launched by AWS, PowerDown will automatically discover the new servers. When an instance is terminated due to Auto Scale, PowerDown will automatically remove the instance from the list of managed EC2 hosts.
PowerDown will mark Auto Scale server instances as dependencies of the Auto Scale group and will be displayed under the Auto Scale group in the resource list.
PowerDown augments the Auto Scale capability by providing transparent replacement of On-Demand servers with more cost effective Spot instances. These can be configured under the Resource Edit Page.
How does PowerDown compare with AWS SpotFleet?
An AWS Spot Fleet launches and maintains a specified number of Spot instances and On-Demand instances to meet the target capacity that you specified in the Spot Fleet request. However if the Spot pool is depleted, AWS will reclaim some or all of your Spot instances. You can specify some On-Demand instances for your Fleet, but AWS will not dynamically replace terminated Spot instances with On-Demand instances -- your capacity will be reduced, perhaps to zero. This severely limits the guaranteed availability of the Fleet and curtails use of Spot Fleets with production workloads.
PowerDown remedies this by extending and improving the standard Auto Scale and Spot Fleet services. PowerDown dynamically replaces Spot instances with On-Demand instances when Spot instances are about to be reclaimed. PowerDown ensures your total capacity is maintained when some or all of your Spot instances are reclaimed. PowerDown enables you to use Spot instances in production workloads by ensuring high availability for your Auto Scale groups.
Why are my Projected Savings Zero?
PowerDown will accumulate savings for Spot instances created by PowerDown and for resources turned off by PowerDown. If you manually create your own Spot instances or stop servers via other means such as the AWS console or CLI, they will be correctly displayed as powered down, but they will not count as "savings" — after all, PowerDown has not done anything for you.
Once you configure Spot Optimization for an Auto Scale group or create schedules to power down resources, the savings will accumulate and be displayed on the Savings report.
How long is the PowerDown evaluation trial period?
The PowerDown evaluation period is 30 days. If you convert to a paid-up subscription before the evaluation period has expired, you will still receive the full 30 day benefit and not be charged during this period.
How much does PowerDown cost?
PowerDown charges a flat 15% of what you save on your cloud bill by using Spot instances or by powering down resources. If you do not save, you do not pay.
PowerDown counts the compute portion of your cloud bill for created Spot instances and for powered down resources — network and storage components are not included.
If I power down a resource for a long time, will I keep being charged?
After 14 days, PowerDown will stop counting the resource in its savings calculations. Thereafter, you will not incur any further charge. So you can safely use PowerDown to turn off any resource for a long duration.
Why do my RDS databases keep starting up?
AWS will restart RDS databases that are powered down for longer than 7 days. To keep an RDS database powered down, create a schedule to power down the database.
Can I use Terraform with PowerDown?
Yes, you can use PowerDown with the Terraform tool to configure your AWS resources.
One tip when deploying Auto Scale groups with Terraform, is to not set the Auto Scale Group "desired" parameter. If you leave this parameter unset, the existing value in the Auto Scale group will be preserved. If a value is not defined for "desired", Auto Scale will use the maximum value by default. By leaving "desired" unset in your Terraform rules, you can deploy/apply with Terraform and not change any "desired" values you are updating via PowerDown or other tools.
How can I change my password?
You can change your login password at: Account Password
How do I cancel my account?
Go to Account Billing and click on the red Close my Account button at the bottom of the page.