Cloud Computing Scalability and Performance
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Questions and Answers

What is the primary benefit of horizontal scaling in cloud computing?

  • Matching changing workload demands (correct)
  • Improving resource utilization
  • Reducing instance size
  • Increasing instance size

    • Which type of load balancing uses a dedicated hardware device?

  • Cloud-based
  • Hardware-based (correct)
  • Software-based
  • Virtual-based

    • What is the primary goal of load balancing?

  • Improving resource utilization
  • Increasing instance size
  • Reducing instance size
  • Distributing incoming traffic across multiple servers (correct)

    • Which failover strategy involves having multiple redundant servers in a cluster?

    <p>N+1 redundancy</p> Signup and view all the answers

    What is the primary benefit of rapid elasticity in cloud computing?

    <p>Matching changing workload demands</p> Signup and view all the answers

    Which load balancing algorithm directs incoming requests to a server based on the client's IP address?

    <p>IP Hash</p> Signup and view all the answers

    What is the primary characteristic of on-demand self-service in cloud computing?

    <p>Automated resource provisioning</p> Signup and view all the answers

    Which failover strategy involves having one active server and one passive server in standby mode?

    <p>Active-passive failover</p> Signup and view all the answers

    What is the primary advantage of multi-tenancy in cloud computing?

    <p>Reduced costs and improved utilization</p> Signup and view all the answers

    What is the purpose of load balancing?

    <p>To distribute workload and improve responsiveness and reliability</p> Signup and view all the answers

    What is the difference between horizontal and vertical scaling?

    <p>Horizontal scaling adds more servers, while vertical scaling upgrades individual servers</p> Signup and view all the answers

    What is the purpose of auto-scaling?

    <p>To scale resources automatically based on predefined rules and metrics</p> Signup and view all the answers

    What type of load balancing distributes traffic based on the client's IP address?

    <p>IP Hash</p> Signup and view all the answers

    What is the primary advantage of cloud-based load balancing?

    <p>Increased flexibility and scalability</p> Signup and view all the answers

    What is the primary goal of horizontal scaling?

    <p>To increase processing power and improve responsiveness</p> Signup and view all the answers

    What is the primary characteristic of on-demand self-service in cloud computing?

    <p>Resources can be provisioned and de-provisioned automatically without human intervention</p> Signup and view all the answers

    What is the primary advantage of rapid elasticity in cloud computing?

    <p>Resources can be quickly scaled up or down to match changing business needs</p> Signup and view all the answers

    What is the primary difference between manual and auto-scaling?

    <p>Manual scaling is performed by administrators, while auto-scaling is performed automatically</p> Signup and view all the answers

    Study Notes

    Scalability, Performance, and Availability

    Cloud Computing

    • Scalability: Cloud computing allows for horizontal scaling (increasing/decreasing instances) and vertical scaling (increasing/decreasing instance size) to match changing workload demands.
    • On-demand self-service: Cloud resources can be provisioned and de-provisioned automatically, without human intervention.
    • Resource pooling: Cloud providers pool resources together to provide a multi-tenant environment, maximizing resource utilization.
    • Rapid elasticity: Cloud resources can be quickly scaled up or down to match changing workload demands.

    Load Balancing

    • Definition: Load balancing is a technique to distribute incoming traffic across multiple servers to improve responsiveness, reliability, and scalability.
    • Types of load balancing:
      • Hardware-based: Using a dedicated hardware device to balance traffic.
      • Software-based: Using software to balance traffic, often running on a virtual machine or container.
      • Cloud-based: Cloud providers offer load balancing services, often integrated with their infrastructure.
    • Load balancing algorithms:
      • Round-robin: Each incoming request is sent to the next available server in a predetermined sequence.
      • Least connection: Incoming requests are sent to the server with the fewest active connections.
      • IP Hash: Each incoming request is directed to a server based on the client's IP address.

    Failover Strategies

    • Active-passive failover: One active server handles all requests, while a passive server waits in standby mode, ready to take over in case of failure.
    • Active-active failover: Both servers are active and handle requests, with load balancing and synchronization mechanisms to ensure data consistency.
    • N+1 redundancy: One or more redundant servers are added to a cluster, ensuring that the system remains operational even if one server fails.
    • Failback: A failed server is repaired or replaced, and then returned to service, often with automated processes to ensure minimal downtime.

    Cloud Computing

    • Cloud computing allows for horizontal scaling, increasing or decreasing instances to match changing workload demands.
    • Cloud computing allows for vertical scaling, increasing or decreasing instance size to match changing workload demands.
    • Cloud resources can be provisioned and de-provisioned automatically through on-demand self-service, without human intervention.
    • Cloud providers pool resources together to provide a multi-tenant environment, maximizing resource utilization through resource pooling.
    • Cloud resources can be quickly scaled up or down to match changing workload demands through rapid elasticity.

    Load Balancing

    Definition and Types

    • Load balancing is a technique to distribute incoming traffic across multiple servers to improve responsiveness, reliability, and scalability.
    • Load balancing can be categorized into three types: hardware-based, software-based, and cloud-based.

    Load Balancing Algorithms

    • Round-robin algorithm: Each incoming request is sent to the next available server in a predetermined sequence.
    • Least connection algorithm: Incoming requests are sent to the server with the fewest active connections.
    • IP Hash algorithm: Each incoming request is directed to a server based on the client's IP address.

    Failover Strategies

    Failover Techniques

    • Active-passive failover: One active server handles all requests, while a passive server waits in standby mode, ready to take over in case of failure.
    • Active-active failover: Both servers are active and handle requests, with load balancing and synchronization mechanisms to ensure data consistency.

    Redundancy Strategies

    • N+1 redundancy: One or more redundant servers are added to a cluster, ensuring that the system remains operational even if one server fails.
    • Failback: A failed server is repaired or replaced, and then returned to service, often with automated processes to ensure minimal downtime.

    Cloud Computing

    • Cloud computing resources can be scaled up or down quickly to match changing business needs.
    • Resources can be provisioned and de-provisioned automatically without human intervention through on-demand self-service.
    • Multiple customers share the same infrastructure, reducing costs and improving utilization, which is known as multi-tenancy.
    • Cloud computing resources can be quickly scaled up or down to match changing business needs, which is known as rapid elasticity.

    Load Balancing

    Distribution of Workload

    • Incoming traffic is distributed across multiple servers to improve responsiveness and reliability.
    • There are three types of load balancing:
      • Hardware-based: Dedicated hardware devices distribute traffic.
      • Software-based: Software applications distribute traffic.
      • Cloud-based: Cloud providers offer load balancing as a service.

    Load Balancing Algorithms

    • There are three load balancing algorithms:
      • Round Robin: Each server is used in sequence.
      • Least Connection: Traffic is directed to the server with the fewest connections.
      • IP Hash: Each client is directed to a specific server based on their IP address.

    Scaling

    Types of Scaling

    • There are two types of scaling:
      • Horizontal scaling (Scaling out): Adding more servers to distribute the workload and increase processing power.
      • Vertical scaling (Scaling up): Upgrading individual servers to increase processing power.

    Scaling Methods

    • There are two scaling methods:
      • Manual scaling: Scaling is performed manually by administrators.
      • Auto-scaling: Scaling is performed automatically based on predefined rules and metrics.

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    Description

    Learn about the scalability and performance benefits of cloud computing, including on-demand self-service and resource pooling. Understand how cloud resources can be provisioned and de-provisioned automatically.

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