Software Defined Data Center: The Intersection of Networking and Storage

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Software Defined
Data Center:
The Intersection of Networking and
Storage
Dave Cohen

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Overview
 Abstract
• There has been quite a bit of marketing rhetoric around Software Defined Data Center
(SDDC) since VMware’s acquisition of Nicira. In this session we explore the components of
an SDDC. Our specific focus is on the composition of a SDDC’s resource model: Compute,
Networking, and Storage. The emphasis is on the disaggregated I/O for Network and
Storage resources.
 Objectives
• Objective 1: Describe the disaggregated I/O resource model employed to facilitate the use of
virtualized Ethernet and Block devices in a Software Defined Data Center.
• Objective 2: Explain how end-user driven provisioning of virtual Ethernet devices and Block devices
serve to decouple resource use from infrastructure management.
• Objective 3: Describe some of the opportunities and challenges associated with employing
disaggregate I/O.

Not all Data Centers are the Same

Infrastructure is a Differentiator when
Delivered as a Service
1. Business Agility
• Enable end-users (App-Dev) to deliver greater value to their business partner by providing them
with self-service capabilities.
• Improve the quality and speed of delivery of IT services
• Enable IT to eliminate waste by running the Infrastructure at high levels of utilization
2. Dispelling the Myth that “Infrastructure is not a Differentiator”
• Is improving Business Agility predicated on wholesale adoption of Cloud and migrating all of
Enterprise IT to Amazon/AWS?
• Or will Enterprise Customers Invest in making their own IT Services more competitive with
Amazon/AWS?
3. Examples where Companies are deciding that Amazon/AWS’s model is right
but believe “*Infrastructure is a Differentiator*”
• Ebay
• Google Compute Engine (GCE)
• Microsoft Windows (Azure)
• PayPal
• Rackspace Hosting

Infrastructure as a Service (IaaS)

Cloud Reference Platform (CRP)

Software Defined Data Center (SDDC)

SDDC’s Resource Model: Objective 1
In this section we describe the disaggregated I/O resource model
employed to facilitate the use of virtualized Ethernet and Block
devices in a Software Defined Data Center.

Instance Creation of a Network in an SDDC

Network Function Virtualization - Architecture

Network Controller

NFV – Traffic Flow

NFV – Application Traffic (Mechanics)

Instance Creation of a Volume in SDDC

Storage Function Virtualization - Architecture

Storage Controller

SFV – Storage Traffic Flow

SFV – Storage Traffic (Mechanics)

SDDC and Business Agility: Objective 2

Revisiting the SDDC Model

An Example of Networking in an SDDC
OpenStack’s Quantum Network

Network Connectivity Pooling
Horizontally Scaling Physical Bandwidth Capacity

An Example of Block Storage in an SDDC
OpenStack’s Cinder Storage

Storage Capacity Pooling
Horizontally Scaling Physical Storage Capacity

SDDC – Looking Forward: Objective 3

Differentiated Infrastructure Service Delivery
Areas for Opportunity and Cause for Concern
1. Improving All Facets of Security
2. Increasing the Breadth of Available Instance Types within a
Resource Class
3. Decreasing Resource Delivery Time/Improving Capacity
Management
4. Increasing Average Utilization by Improving Resource
Scheduling
5. Decreasing Frequency of Outages, both Scheduled and
Unscheduled
6. Decreasing the Time to Recover from an Outage

Converged, Multitenant Networking
Its about Congestion Management

Software Defined Data Center: The Intersection of Networking and Storage

Software Defined Data Center: The Intersection of Networking and Storage

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