What is DB instance identifier?
Each DB instance has a DB instance identifier. This customer-supplied name uniquely identifies the DB instance when interacting with the Amazon RDS API and AWS CLI commands. The DB instance identifier must be unique for that customer in an AWS Region.
How do you reference parameters in CloudFormation?
Referencing a parameter within a template
You use the Ref intrinsic function to reference a parameter, and AWS CloudFormation uses the parameter’s value to provision the stack. You can reference parameters from the Resources and Outputs sections of the same template.
How do I find my RDS instance ID?
If you created your RDS instance using tools such as CloudFormation, your RDS instance ID may have been automatically generated. When viewing the list of RDS instances in the AWS Management Console, the RDS instance ID for your instances is located in the “DB Instance” column.
What is CloudFormation logical ID?
Logical ID
Use the logical name to reference the resource in other parts of the template. For example, if you want to map an Amazon Elastic Block Store volume to an Amazon EC2 instance, you reference the logical IDs to associate the block stores with the instance.
What is difference between database and instance?
The database is the data on disk, stored in operating system files (or possibly, under Unix, in raw files). The instance is composed of the System Global Area (SGA) memory and the background processes. The instance is STARTed using Oracle Server Manager or Oracle Enterprise Manager (OEM).
What is burstable DB instance?
T2 instances are burstable general-purpose performance instances that provide a baseline level of CPU performance with the ability to burst above the baseline. T2 instances are a good choice for a variety of database workloads including micro-services and test and staging databases.
What can the ref identifier in a cloud formation template file be used to reference?
You can use the Ref function to refer to an identifying property of a resource. Frequently, this is the physical name of the resource; however, sometimes it can be an identifier, such as the IP address for an AWS::EC2::EIP resource or an Amazon Resource Name (ARN) for an Amazon SNS topic.
What is pseudo parameter in AWS CloudFormation?
Pseudo parameters are parameters that are predefined by AWS CloudFormation. You don’t declare them in your template. Use them the same way as you would a parameter, as the argument for the Ref function.
What is host name in RDS instance?
Amazon RDS instance hostnames don’t change for as long as the instance is running. It persists reboots too. If you use a cluster, then you should use the cluster endpoint as the hostname in your applications. You could use the hostname as it is or create a simple CNAME record in your DNS to make it memorable.
What is an AWS RDS instance?
Amazon RDS provides a selection of instance types optimized to fit different relational database use cases. Instance types comprise varying combinations of CPU, memory, storage, and networking capacity and give you the flexibility to choose the appropriate mix of resources for your database.
What is construct ID?
Construct IDs
The most common identifier, id , is the identifier passed as the second argument when instantiating a construct object. This identifier, like all identifiers, need only be unique within the scope in which it is created, which is the first argument when instantiating a construct object.
What are the 3 types of database schema?
Schema is of three types: Logical Schema, Physical Schema and view Schema.
What is database instance with example?
While the database includes the application data and metadata stored in physical files on a server, an instance is a combination of the software and memory used to access that data. For example, if you sign in to an Oracle database, your login session is an instance.
How do I choose the right RDS instance?
When analyzing performance data for Amazon RDS DB instances, focus on the following metrics to determine whether actual usage is lower than instance capacity:
- Average CPU utilization.
- Maximum CPU utilization.
- Minimum available RAM.
- Average number of bytes read from disk per second.
Which EC2 instance type offers burstable performance?
EC2 burstable instance types
The EC2 burstable instances consist of T4g, T3a and T3 instance types, and the previous generation T2 instance types. The T4g instance types are the latest generation of burstable instances.
What are parameters which are predefined by CloudFormation called?
What are the main components of CloudFormation?
A CloudFormation template consists of 6 sections – Description, Parameters, Mappings, Conditions, Resources and Outputs.
How are variables used in CloudFormation?
A string with variables that AWS CloudFormation substitutes with their associated values at runtime. Write variables as ${ MyVarName } . Variables can be template parameter names, resource logical IDs, resource attributes, or a variable in a key-value map.
How do I find my RDS database name?
Sign in to the AWS Management Console and open the Amazon RDS console at https://console.aws.amazon.com/rds/ . In the navigation pane, choose Databases to display a list of your DB instances. Choose the name of the MySQL DB instance to display its details.
How do I connect to an RDS instance?
Enter the following details for the MySQL instance settings:
- MySQL Hostname: Enter the RDS DB instance endpoint.
- MySQL Server port: Enter 3306 (or the custom port that you use).
- Username: Enter the master user name of the RDS DB instance.
- Password: Enter the master password of the RDS DB instance.
What are L1 constructs?
L1 constructs are exactly the resources defined by AWS CloudFormation—no more, no less. You must provide the resource’s required configuration yourself. Here, for example, is how to create an Amazon S3 bucket using the CfnBucket class. (You’ll see a similar definition using the Bucket class in the next section.)
What are L2 constructs?
L2 constructs define resources and include an intent-driven API with additional helper methods, properties, and functionality. For example, you could create a custom L2 construct that contains a method for adding files to an S3 Bucket and a method for granting resource access to a particular user group.
What is 3 level architecture DBMS?
The three levels present in this architecture are Physical level, Conceptual level and External level.
What are the 3 levels of data abstraction?
There are mainly 3 levels of data abstraction:
- Physical: This is the lowest level of data abstraction.
- Logical: This level comprises the information that is actually stored in the database in the form of tables.
- View: This is the highest level of abstraction.