Heroku Postgres

Website

heroku.com

Pricing URL

-

Categories

#Databases #Relational Databases #NoSQL Databases #SQL Database

Datomic

Website

datomic.com

Pricing URL

Official Datomic Pricing

Categories

#Databases #Relational Databases #NoSQL Databases #Network & Admin

Heroku Postgres features and specs

• Scalability
  Heroku Postgres offers seamless vertical and horizontal scaling, allowing you to handle increased loads without significant changes to your application.
• Managed Service
  Heroku manages the database infrastructure, which includes automated backups, software updates, and security patches, reducing the operational overhead.
• Integration
  Heroku Postgres integrates well with other Heroku services and add-ons, facilitating a smoother development and deployment workflow.
• High Availability
  It provides high availability features like automated failover and redundancy to minimize downtime and ensure consistent performance.
• Monitoring Tools
  Includes several built-in tools for monitoring database performance, which help you identify and troubleshoot issues efficiently.

Possible disadvantages of Heroku Postgres

• Cost
  Heroku Postgres can be more expensive than self-hosted solutions, especially as your database requirements grow.
• Limited Control
  As a managed service, it offers less control over database configurations and customizations compared to self-managed databases.
• Vendor Lock-In
  Using Heroku Postgres can make it more challenging to transition to other platforms in the future, potentially leading to vendor lock-in.
• Latency
  For applications not hosted on Heroku, there can be increased latency when interacting with the Heroku Postgres service due to its remote nature.
• Advanced Feature Limitations
  Some advanced PostgreSQL features might not be fully supported or available in Heroku Postgres, limiting its use for certain specialized applications.

Datomic features and specs

• Immutability
  Datomic employs an append-only data model where data is never overwritten but instead appended, ensuring historical data is always available and providing strong consistency.
• Time Travel Queries
  Datomic allows you to query the database as of any point in time, facilitating auditing and debugging by allowing easy access to historical data states.
• Rich Data Model
  Supports complex data types like maps and sets directly within its schema, providing a flexible way to represent data.
• ACID Transactions
  Datomic supports fully ACID-compliant transactions, ensuring reliable and predictable database operations.
• Scalability
  Separates storage and compute, allowing for horizontal scaling of read operations, making it suitable for handling large datasets.
• Query Flexibility
  Offers a powerful query language that supports recursive queries, making it suitable for complex data retrieval needs.

Possible disadvantages of Datomic

• Complexity
  The architecture of Datomic can be complex to understand and implement, particularly for teams unfamiliar with its design principles.
• Cost
  Can be expensive to operate, especially in a cloud environment, where costs increase with the amount of data stored and the compute resources required.
• Limited Write Throughput
  Due to its append-only design, Datomic can have limited write throughput, which may not be suitable for applications with heavy write requirements.
• Closed Source
  Datomic is a proprietary database system, which may not appeal to organizations that prefer open-source solutions.
• Learning Curve
  Requires a learning curve as its conceptual model and query language are different from traditional databases, potentially requiring additional training.
• Dependency on AWS
  Relying on AWS ecosystem for the storage backend can limit choices for deployment environments, impacting flexibility.

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KotlinConf 2018 - Datomic: The Most Innovative DB You've Never Heard Of by August Lilleaas

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