Question

1. Give an open-source software for the following cloud storage? Block storage: File storage: Object storage: SQL database: Key-value database: Document-based database Column-based database: Graph-based database: 2. What is the difference between virtual machines and containers? Feature Virtual Machines Containers Booting time Size Isolation Migration Security 3. What is the difference between Kubernetes and Docker Swarm? 4 What are the advantages and disadvantages of NoSQL?

Answer 1

1) Open-source software for the following cloud storage:

Block Storage: Red Hat Ceph Storage
File Storage: OwnCloud
Object Storage: OpenStack Swift
SQL database: MySQL
Key-value database: Aerospike
Document-based database: MongoDB
Column-based database: Clickhouse
Graph-based database: Neo4j

2) Difference between virtual machines and containers:

Feature	Virtual Machines	Containers
Booting time	Takes several minutes	Starts instantly
Size	Larger size (upto few Gigabytes)	Smaller size (within Megabytes)
Isolation	Provides complete isolation from the host operating system	Provides lightweight isolation from the host
Migration	Migration of any application workload between different virtual machines needs the entire OS to migrate along with it.	Migration of containers don’t need to perform complex configuration tasks. The workloads migrate across the physical resources.
Security	Security attacks are very well understood and can be tackled. The security is good.	Security attacks can’t be well understood as no one really knows from where the attacks could come. The security is less than Virtual Machines.

3) Difference between Kubernetes and Docker Swarm:

Point of Difference	Kubernetes	Docker Swarm
Application Deployment	The deployment of applications includes myriad of microservices, pods and deployments.	Applications can be used only as microservices in the swarm cluster.
Scalability	It acts like an all-in-one framework while working with distributed systems. Thus, it is more complicated as it provides stronger guarantees in terms of unified set of APIs and cluster state.	It can deploy containers much faster than Kubernetes, that allows faster reaction times for scaling on demand.
Networking	Kubernetes has a flat network model, allowing all the pods to communicate with each other.	When a node joins the swarm cluster, an overlay network is created for services for each host in the docker swarm.
Logging and Monitoring	It includes built-in tools to manage both processes.	It doesn’t require to use any tools for logging and monitoring.
GUI	It has detailed dashboards that allow even non-technical users to control the clusters effectively.	Alternatively, it requires a third-party tool like Portainer.io for managing the UI conveniently.

4) Advantages of NoSQL:

· It handles large volumes of data at high speed using a scale-out architecture.

· It enables easy updates to the schemas and fields.

· It is developer friendly.

· It takes full advantage of the cloud, thus, delivering zero downtime.

· It stores unstructured, semi-structured or structured data.

Disadvantages of NoSQL:

· It doesn’t has the reliability functions which Relational Databases have.

· It lacks a standardized platform like SQL, which prevents it from further expanding.

· It is not at all compatible with SQL.

· It is very less stable as it is very new as compared to Relational Databases and thus may have less functionalities.

· For supporting ACID, developers will need to implement their own codes that makes their systems more complex.