Apache Cassandra

Website

cassandra.apache.org

Pricing URL

-

$ Details

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Categories

#Databases #NoSQL Databases #Relational Databases #Big Data

Dgraph

Website

dgraph.io

Pricing URL

Official Dgraph Pricing

$ Details

Categories

#Graph Databases #Databases #NoSQL Databases #Big Data

Apache Cassandra features and specs

• Scalability
  Apache Cassandra is designed for linear scalability and can handle large volumes of data across many commodity servers without a single point of failure.
• High Availability
  Cassandra ensures high availability by replicating data across multiple nodes. Even if some nodes fail, the system remains operational.
• Performance
  It provides fast writes and reads by using a peer-to-peer architecture, making it highly suitable for applications requiring quick data access.
• Flexible Data Model
  Cassandra supports a flexible schema, allowing users to add new columns to a table at any time, making it adaptable for various use cases.
• Geographical Distribution
  Data can be distributed across multiple data centers, ensuring low-latency access for geographically distributed users.
• No Single Point of Failure
  Its decentralized nature ensures there is no single point of failure, which enhances resilience and fault-tolerance.

Possible disadvantages of Apache Cassandra

• Complexity
  Managing and configuring Cassandra can be complex, requiring specialized knowledge and skills for optimal performance.
• Eventual Consistency
  Cassandra follows an eventual consistency model, meaning that there might be a delay before all nodes have the latest data, which may not be suitable for all use cases.
• Write-heavy Operations
  Although Cassandra handles writes efficiently, write-heavy workloads can lead to compaction issues and increased read latency.
• Limited Query Capabilities
  Cassandra's query capabilities are relatively limited compared to traditional RDBMS, lacking support for complex joins and aggregations.
• Maintenance Overhead
  Regular maintenance tasks such as node repair and compaction are necessary to ensure optimal performance, adding to the administrative overhead.
• Tooling and Ecosystem
  While the ecosystem for Cassandra is growing, it is still not as extensive or mature as those for some other database technologies.

Dgraph features and specs

• High Performance
  Dgraph is optimized for high-throughput and low-latency scenarios, making it suitable for real-time applications with large datasets.
• Horizontal Scalability
  Dgraph offers seamless horizontal scalability, allowing the system to expand across multiple nodes to handle increased workloads.
• GraphQL Compatibility
  Dgraph provides native support for GraphQL, allowing developers to use a widely accepted query language with their graph database.
• Distributed Architecture
  Being a distributed graph database, Dgraph ensures data replication and high availability across different geographical locations.
• Strong Consistency
  Dgraph offers strong consistency guarantees, ensuring that all nodes see the same data at the same time, which is crucial for many applications.

Possible disadvantages of Dgraph

• Complex Setup
  Setting up and managing Dgraph can be complex, especially for users not familiar with distributed systems.
• Resource Intensive
  Running Dgraph in a production environment can be resource-intensive, requiring significant computational resources and memory.
• Learning Curve
  For developers new to graph databases, there may be a steep learning curve compared to more traditional relational databases.
• Limited Tooling Ecosystem
  Compared to some older graph databases, Dgraph's ecosystem, in terms of third-party tools and integrations, is not as mature.
• Community Support
  As a relatively newer entrant in the database market, Dgraph may have less community-driven support compared to more established databases.

Course Intro | DS101: Introduction to Apache Cassandra™

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Intro to Slash GraphQL from Dgraph

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