DELL D-ISM-FN-23 Practice Test - Questions Answers, Page 19

Dell EMC VxBlock system is aconverged infrastructure (CI) solutionthat combines compute, virtualization, network, storage into an engineered solution.

VxBlock is designed to reduce complexity, improve agility, and provide a predictable IT infrastructure while allowing organizations to quickly adapt to changing business needs. The components of the system are integrated and tested to provide an end-to-end infrastructure that can quickly scale up or down to meet the demands of the data center. Additionally, VxBlock allows organizations to access industry-leading software and tools to automate and simplify operations.

According to1, cloud service models are categories of services that cloud providers offer to users and businesses. The three cloud service models are:

Software as a Service (SaaS): The provider delivers software applications over the internet that users can access via web browsers or mobile apps. Examples: Gmail, Salesforce, Netflix.

Infrastructure as a Service (IaaS): The provider offers computing resources such as servers, storage, networks and virtual machines that users can rent and manage via a web portal or an API. Examples: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP).

Platform as a Service (PaaS): The provider offers a web-based environment where developers can build cloud applications using a database, operating system and programming language provided by the provider. Examples: Heroku, Google App Engine, AWS Elastic Beanstalk.

Based on these definitions12, the cloud service model that provides compute, network and storage resources through self-service portal isInfrastructure as a Service (IaaS)34.This is because IaaS allows users to rent and manage computing resources via a web portal or an API without having to maintain the underlying elements2.

Virtual provisioning is a storage management technique that enables more efficient allocation of storage to compute systems. It allows storage administrators to create virtual storage resources that are presented to compute systems as if they were physical resources, even if the physical storage capacity does not exist. Virtual provisioning supports various types of virtual storage, including thin LUNs and thin clones. Thin LUNs enable shared and rapid expansion with only minor disruptions. Multiple shared storage pools can be created, and each pool can be allocated to multiple thin LUNs. However, virtual provisioning does not prevent issues that arise from oversubscription; it is important to monitor and manage capacity utilization to avoid performance degradation or service disruptions.

Reference: Section 2.5.1 Virtual Provisioning, page 107.

An OSD storage system is an object-based storage system that stores data as objects rather than files or blocks1.An OSD storage system consists of OSD nodes that have two key services: metadata service and storage service1.

The metadata service is responsible for generating the object ID from the contents of a file1. The object ID is a unique identifier that represents the data and its attributes.The metadata service also maintains the mapping of the object IDs and the file system namespace1. The file system namespace is a logical structure that organizes files into directories and subdirectories.

The storage service manages a set of disks on which the user data is stored1. The storage service stores data as objects in physical OSD containers. Each OSD container has a unique address that corresponds to an object ID. The storage service also handles requests from clients to read or write data to or from objects.

This is an example of an image-based data protection method. With image-based data protection, a proxy server regularly takes Point-in-Time (PIT) snapshots of the virtual machine (VM) that is being protected. These snapshots are then stored in a secure location, allowing the user to quickly restore access to the VM in the event of a hardware failure. This type of data protection is effective for preserving the state of the VM, as well as any data stored on it, making it a reliable and secure way to protect data.

In your scenario, a full backup was performed on Sunday and incremental backups were performed on Monday, Tuesday and Wednesday. If files were accidentally deleted Thursday morning, you would needtwobackup copies to restore the files:the full backup from Sunday and the incremental backup from Wednesday. This is because the incremental backup from Wednesday would contain all the changes made since Sunday's full backup.