Container-based Multi-Instance Systems
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Questions and Answers

What is a key disadvantage of using multi-instance systems?

  • Faster startup times leading to higher operational expenses
  • Higher costs associated with managing multiple systems (correct)
  • Increased security risks due to shared databases
  • Limited ability to customize software for individual users

Why are container-based multi-instance systems best suited for products where users mostly work independently?

  • Because they offer high levels of data sharing among users
  • Because they are cost-effective for business products
  • Because they require minimal adaptation to customer needs
  • Because each user has an isolated version of the software and database (correct)

How does the flexibility of multi-instance databases contribute to their advantage?

  • By reducing the costs associated with renting VMs
  • By ensuring consistent database schemas across different customers
  • By limiting data sharing between customers
  • By tailoring each instance of the software to a customer's needs (correct)

What makes VM-based multi-instance systems more expensive compared to other approaches?

<p>The costs of renting many VMs in the cloud and managing multiple systems (B)</p> Signup and view all the answers

Why is it crucial for software serving individuals to adopt a multi-instance system approach?

<p>To allow for tailored versions of software to meet individual needs (C)</p> Signup and view all the answers

In what way does each customer having its own database contribute to the security advantage of multi-instance systems?

<p>By preventing data leakage from one customer to another (B)</p> Signup and view all the answers

What makes updates in multi-instance systems more complex?

<p>Instances being tailored to customer needs (D)</p> Signup and view all the answers

What type of virtualization technology can be used for a cloud-based system with many instances of applications or services that all use the same operating system?

<p>Container-based virtualization (B)</p> Signup and view all the answers

Which characteristic of multi-instance systems allows some customers to continue working normally if a software failure impacts one customer?

<p>Resilience (D)</p> Signup and view all the answers

In a multi-instance system, what characteristic allows a virtual server to have no external dependencies?

<p>Runs on any hardware in the cloud (D)</p> Signup and view all the answers

What is a potential disadvantage of using multi-instance databases?

<p>Security concerns about database sharing (B)</p> Signup and view all the answers

What virtualization technology provides hardware emulation simulating the operation of underlying hardware?

<p>Hypervisor-based virtualization (A)</p> Signup and view all the answers

In the context of database organization, what model is usually best for very large databases?

<p>Multi-tenant model (B)</p> Signup and view all the answers

What is a key advantage of using container-based virtualization over VM-based virtualization technology?

<p>Simplifies the process of deploying virtual servers on the cloud (A)</p> Signup and view all the answers

What is a key advantage of VM-based multi-instance systems?

<p>Guaranteed ACID transactions (B)</p> Signup and view all the answers

In a container-based virtualization system, what is usually the size of containers compared to VMs?

<p>Megabytes (D)</p> Signup and view all the answers

What characteristic of container-based multi-instance systems helps in optimizing performance for very large databases?

<p>Focusing effort on performance optimization (A)</p> Signup and view all the answers

Which type of virtualization technology uses virtual machines to implement virtual servers?

<p>Hypervisor-based virtualization (B)</p> Signup and view all the answers

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