Question

Which component of openstack is responsible for providing persistent block storage to running instances?
(a) Neutron
(b) Nova
(c) Swift
(d) Cinder

_________ is a formal XML-schema based language to express SLA.
(a) WS-Agreement
(b) WSLA
(c) SLO
(d) None of the above

Answer 1

1. (c) swift
2. (b) WSLA

Answer 2

Question: I

Answer:

Cinder provides persistent block storage in OpenStack.

Explanation:

Cinder is the OpenStack service which allows persistent block storage. Its primary function is presenting storage resources to the end-users which can used by the Nova.

Technologies like reference implementation or plugin drivers are used to achieve this. Automation and Abstraction form the basic processes of block storage provision.

Question: II

Answer:

WSLA is a formal XML-schema based language to express SLA

Explanation:

WSLA stands for Web Service Level Agreement Language. This language justifies the obligations of the parties involved between the customer and a provider.

Obligation of the provider includes performing according to the agreed upon standards and IT parameters. SLA contains the decisions that should be made in case the standards aren’t met. Therefore WSLA can assess the operation on hand and it is primarily used to express SLA.