Amazon ElastiCache | Billing Flashcards
What is a maintenance window? Will my nodes be available during software maintenance?
Billing
Amazon ElastiCache | Database
You can think of the Amazon ElastiCache maintenance window as an opportunity to control when software patching occurs, in the event either are requested or required. If a “maintenance” event is scheduled for a given week, it will be initiated and completed at some point during the 60 minute maintenance window you identify.
Your nodes could incur some downtime during your maintenance window if software patching is scheduled. Please refer to Engine Version Management for more details. Patching can be user requested - for example cache software upgrade, or determined as required (if we identify any security vulnerabilities in the system or caching software). Software patching occurs infrequently (typically once every few months) and should seldom require more than a fraction of your maintenance window. If you do not specify a preferred weekly maintenance window when creating your Cluster, a 60 minute default value is assigned. If you wish to modify when maintenance is performed on your behalf, you can do so by modifying your DB Instance in the AWS Management Console or by using the ModifyCacheCluster API. Each of your Clusters can have different preferred maintenance windows, if you so choose.
How will I be charged and billed for my use of Amazon ElastiCache?
Billing
Amazon ElastiCache | Database
You pay only for what you use and there is no minimum fee. Pricing is per Node-hour consumed for each Node Type. Partial Node-hours consumed are billed as full hours. There is no charge for data transfer between Amazon EC2 and Amazon ElastiCache within the same Availability Zone. While standard Amazon EC2 Regional Data Transfer charges apply when transferring data between an Amazon EC2 instance and an Amazon ElastiCache Node in different Availability Zones of the same Region, you are only charged for the Data Transfer in or out of the Amazon EC2 instance. There is no Amazon ElastiCache Data Transfer charge for traffic in or out of the Amazon ElastiCache Node itself. For more information, please visit the pricing page.
When does billing of my Amazon ElastiCache Nodes begin and end?
Billing
Amazon ElastiCache | Database
Billing commences for a node as soon as the node is available. Billing continues until the node is terminated, which would occur upon deletion.
What defines billable ElastiCache Node hours?
Billing
Amazon ElastiCache | Database
Node hours are billed for any time your nodes are running in an “Available” state. If you no longer wish to be charged for your node, you must terminate it to avoid being billed for additional node hours.
