AWS Lambda VS Periscope Data Cache

• Scalability
  AWS Lambda automatically scales your application by running your code in response to each trigger. This means no manual intervention is required to handle varying levels of traffic.
• Cost-effectiveness
  You only pay for the compute time you consume. Billing is metered in increments of 100 milliseconds and you are not charged when your code is not running.
• Reduced Operations Overhead
  AWS Lambda abstracts the infrastructure management layer, so there is no need to manage or provision servers. This allows you to focus more on writing code for your applications.
• Flexibility
  Supports multiple programming languages such as Python, Node.js, Ruby, Java, Go, and .NET, which allows you to use the language you are most comfortable with.
• Integration with Other AWS Services
  Seamlessly integrates with many other AWS services such as S3, DynamoDB, RDS, SNS, and more, making it versatile and highly functional.
• Automatic Scaling and Load Balancing
  Handles thousands of concurrent requests without managing the scaling yourself, making it suitable for applications requiring high availability and reliability.

Possible disadvantages

• Cold Start Latency
  The first request to a Lambda function after it has been idle for a certain period can take longer to execute. This is referred to as a 'cold start' and can impact performance.
• Resource Limits
  Lambda has defined limits, such as a maximum execution timeout of 15 minutes, memory allocation ranging from 128 MB to 10,240 MB, and temporary storage up to 512 MB.
• Vendor Lock-in
  Using AWS Lambda ties you into the AWS ecosystem, making it difficult to migrate to another cloud provider or an on-premises solution without significant modifications to your application.
• Complexity of Debugging
  Debugging and monitoring distributed, serverless applications can be more complex compared to traditional applications due to the lack of direct access to the underlying infrastructure.
• Cold Start Issues with VPC
  When Lambda functions are configured to access resources within a Virtual Private Cloud (VPC), the cold start latency can be exacerbated due to additional VPC networking overhead.
• Limited Execution Control
  AWS Lambda is designed for stateless, short-running tasks and may not be suitable for long-running processes or tasks requiring complex orchestration.

• Improved Performance
  Periscope Data Cache enhances query performance by storing frequently accessed data, reducing the need for repetitive data retrieval from the primary database.
• Reduced Load on Database
  Caching helps to minimize the strain on the primary database, preventing bottlenecks and ensuring smoother operations during peak times.
• Faster Data Access
  Users experience faster access to reports and dashboards, as cached data is retrieved more quickly than querying the database directly.
• Better User Experience
  With improved performance and faster access times, users have a more seamless experience interacting with analytics and reports.

Possible disadvantages

• Data Staleness
  Cached data may not always reflect the most current state of the database, leading to potential discrepancies in reporting.
• Additional Storage Requirements
  Implementing a caching layer requires additional storage resources, which could increase costs and infrastructure complexity.
• Complex Cache Management
  Managing data cache can become complex, as it requires determining appropriate refresh intervals and ensuring cache consistency.
• Potential Sync Issues
  There is a risk of synchronization issues between the cache and the primary database, which can lead to data consistency problems.

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Tracking Periscope Data Cache since Mar 2021.