Apache ZooKeeper

Website

zookeeper.apache.org

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Categories

#Web And Application Servers #Web Servers #Application Server #Development Tools

AWS Elastic Load Balancing

Website

aws.amazon.com

$ Details

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Categories

#Web Servers #Network & Admin #Web And Application Servers #Load Balancer / Reverse Proxy

Apache ZooKeeper features and specs

• High Availability
  ZooKeeper is designed to be highly available, with built-in redundancy and failover mechanisms that ensure minimal downtime.
• Consistency
  It follows a strict consistency model, ensuring that reads reflect the most recent writes, which is crucial for coordination and configuration management.
• Scalability
  ZooKeeper can handle a high number of read operations and can be scaled horizontally by adding more nodes to the ensemble.
• Leader Election
  ZooKeeper simplifies the implementation of leader election processes, making it easier to design fault-tolerant distributed systems.
• Cluster Management
  It aids in cluster management by providing mechanisms to track the status and configuration of nodes across a distributed system.
• Watch Mechanism
  ZooKeeper provides a watch mechanism that allows clients to be notified of data changes, helping to keep state synchronized across systems.

Possible disadvantages of Apache ZooKeeper

• Complexity
  Setting up and managing a ZooKeeper ensemble can be complex, requiring careful configuration and maintenance.
• Resource Intensive
  ZooKeeper can be resource-intensive, requiring significant memory and CPU, especially in large deployments.
• Write Performance
  While read operations are very fast, write operations can be slower due to the need to achieve consensus among ZooKeeper nodes.
• Operational Overhead
  Managing ZooKeeper involves operational overhead, including monitoring, backups, and handling node failures.
• Limited Programming Language Support
  Although ZooKeeper supports many major languages, the client libraries for some languages may not be as mature or well-supported as those for others.
• Transaction Size
  ZooKeeper is not designed for very large data or complex transactions, limiting its use cases to lightweight coordination tasks.

AWS Elastic Load Balancing features and specs

• Scalability
  AWS Elastic Load Balancing can automatically distribute incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, and IP addresses, promoting application elasticity.
• Health Monitoring
  It continually checks the health of the registered targets, ensuring that traffic is routed only to healthy instances.
• Security
  Integrated with AWS's Certificate Manager and Application Load Balancer, allowing easy deployment of SSL/TLS for secure communication.
• Flexibility
  Supports various types of load balancers: Application, Network, and Classic, each suited to different types of application architectures and requirements.
• Cost-effective
  Pay-as-you-go pricing model ensures you only pay for the resources you use, which can lead to cost savings compared to a fixed-cost solution.
• Integration
  Seamlessly integrates with other AWS services such as Auto Scaling, Route 53, CloudWatch, and more for a more robust solution.

Possible disadvantages of AWS Elastic Load Balancing

• Complexity
  Initial setup and configuration can be complex, especially for users unfamiliar with AWS services and cloud architecture.
• Cost
  While the pay-as-you-go model is cost-effective, the charges can ramp up quickly, especially for high-traffic applications.
• Dependence on AWS Ecosystem
  Highly integrated with AWS services, making it less ideal for multi-cloud or hybrid cloud environments.
• Latency
  In some cases, the load balancer can introduce a slight increase in latency, which might be a concern for latency-sensitive applications.
• Configuration Limitations
  Some specific configurations and customizations may not be possible, leading to constraints on certain types of applications.

Why do we use Apache Zookeeper?

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