SLA Management in Cloud

Dr Neelesh Jain
Instructor and Trainer
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Cloud Monitoring & Management
SLA MANAGEMENT IN CLOUD

Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Introduction
● SLA
● Types of SLA
○ Infrastructure SLA
○ Application SLA
■ Different Parameter or Elements of theses
● Life Cycle of SLA: Five phases:
■ Contract deﬁnition
■ Publishing and discovery
■ Negotiation
■ Operationalization
■ De-commissioning

SLA MANAGEMENT IN CLOUD
SLA management of applications hosted on cloud platforms
involves five phases.
1. Feasibility
2. On-boarding
3. Pre-production
4. Production
5. Termination

SLA MANAGEMENT IN CLOUD- Feasibility
Managed Service Provider (MSP) conducts the feasibility
study of hosting an application on their cloud platforms. This
study involves three kinds of feasibility:
1. Technical feasibility,
2. Infrastructure feasibility, and
3. Financial feasibility.

The technical feasibility of an application implies
determining the following:
1. Ability of an application to scale out.
2. Compatibility of the application with the cloud platform
being used within the MSP’s data center.
3. The need and availability of a specific hardware and
software required for hosting and running of the
application.
4. Preliminary information about the application
performance and whether they can be met by the MSP.

Infrastructure feasibility involves determining the
availability of infrastructural resources in sufficient quantity
so that the projected demands of the application can be met.
The financial feasibility study involves determining the
approximate cost to be incurred by the MSP and the price
the MSP charges the customer so that the hosting activity is
profitable to both of them.
A feasibility report consists of the results of the above three
feasibility studies.

SLA MANAGEMENT IN CLOUD-
On-Boarding of Application
Once the customer and the MSP agree in principle to host
the application based on the findings of the feasibility study,
the application is moved from the customer servers to the
hosting platform. Moving an application to the MSP’s hosting
platform is called on-boarding
On-boarding activity consists of the following steps:
● Packing of the application for deploying on physical or
virtual environments.

● The packaged application is executed directly on the physical
servers to capture and analyze the application performance
characteristics.
● The application is executed on a virtualized platform and the
application performance characteristics are noted again.
Important performance characteristics like the application’s ability
to scale (out and up) and performance bounds (minimum and
maximum performance) are noted.
● Based on the measured performance characteristics, different
possible SLAs are identified.

● Once the customer agrees to the set of SLOs and the
cost, the MSP starts creating different policies required
by the data center for automated management of the
application. This implies that the management system
should automatically infer the amount of system
resources that should be allocated/de-allocated to/from
appropriate components of the application when the
load on the system increases/decreases.

SLA MANAGEMENT IN CLOUD- Preproduction
Once the determination of policies is completed as
discussed in previous phase, the application is hosted in a
simulated production environment. It facilitatesthe customer
to verify and validate the MSP’s findings on application’s
runtimecharacteristics and agree on the defined SLA. Once
both parties agree on the cost and the terms and conditions
of the SLA, the customer sign-off is obtained. On successful
completion of this phase the MSP allows the application to
go on-live.

SLA MANAGEMENT IN CLOUD- Production
In this phase, the application is made accessible to its end
users under the agreed SLA. Here customer may request
the MSP for inclusion of new terms and conditions in the
SLA. If the application SLA is breached frequently or if the
customer requests for a new non-agreed SLA, the on-
boarding process is performed again.

SLA MANAGEMENT IN CLOUD- Termination
When the customer wishes to withdraw the hosted
application and does not wish to continue to avail the
services of the MSP for managing the hosting of its
application, the termination activity is initiated. On initiation
of termination, all data related to the application are
transferred to the customer and only the essential
information is retained for legal compliance. This ends the
hosting relationship between the two parties for that
application, and the customer sign-off is obtained.

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