1. LOGO Service and network administration Storage Virtualization

2. LOGO Outlines Introduction 1 What’s Virtualization? 2 Forms of Virtualization 3 What’s Storage Virtualization? 4 Why storage virtualization? 5 Advantages and disadvantages of Storage Virtualization 6 Different techniques used of storage virtualization 7 Conclusion 8 2

3. LOGO Introduction The economic world of today constrained the enterprises to a strong competitiveness. Of this fact and in order to get a result, all services are concerned. The virtualization for the services of data processing appears therefore like a promising solution. 3

4. LOGO What’s Virtualization? 4 Virtualization is a technique of abstracting physical resources in to logical view Increases utilization and capability of IT resource Simplifies resource management by pooling and sharing resources Significantly reduce downtime - Planned and unplanned Improved performance of IT resources

5. LOGO 5 Forms of Virtualization Virtual Memory Each application sees its own logical memory, independent of physical memoryEach application sees its own logical memory, independent of physical memory Virtual Networks Each application sees its own logical network, independent of physical networkEach application sees its own logical network, independent of physical network Virtual Servers Each application sees its own logical server, independent of physical serversEach application sees its own logical server, independent of physical servers Virtual Storage Each application sees its own logical storage, independent of physical storageEach application sees its own logical storage, independent of physical storage

6. LOGO What’s Storage Virtualization? The act of abstracting, hiding, or isolating the internal functions of a storage (sub) system or service from applications, host computers or general network resources, for the purpose of enabling application and network- independent management of storage or data The application of virtualization to storage services or devices for the purpose of aggregating functions or devices, hiding complexity, or adding new capabilities to lower level storage resources 6

7. LOGO Why storage virtualization? 7 Allocate and manage storage in accordance to the Quality of Service (QoS) associated with the data (e. g. Gartner estimates average data center doubling its storage every 18 to 24 months)!) Provided continuous availability despite exponential growth (e.g. FaceBook- Over 55 billion page views a month, 41 million active users) Effectively group and manage heterogeneous storage devices & servers (e.g. Estimated number of Google Servers 450,000 !) Multiple Storage Software Platforms (e.g. IBM, EMC, HP,..) Mergers and Acquisitions (e.g. Microsoft & Yahoo!)

8. LOGO Advantages and disadvantages of Storage Virtualization Support Manageability Functionality Scalability Ensure storage devices perform appropriate requirements Virtualized environment must provide same or better functionality. Must continue to leverage existing functionality on arrays Virtualization device breaks end-to-end view of storage infrastructure. Must integrate existing management tools Storage Virtualization Challenges

9. LOGO 9 Advantages and disadvantages of Storage Virtualization Disadvantages of Storage Virtualization

10. LOGO 10 Different techniques used of storage virtualization  DAS - Direct Attached Storage Storage device was directly attached to a server or workstation, without a storage network in between.  NAS - Network Attached Storage File-level computer data storage connected to a computer network providing data access to heterogeneous clients.  SAN - Storage Area Network Attach remote storage devices to servers in such a way that the devices appear as locally attached to the operating system.

11. LOGO 11 Different techniques used of storage virtualization  Implementation methods :  In-band Also known as Symmetric, virtualization devices actually sit in the data path between the host and storage. Hosts perform IO to the virtualized device and never interact with the actual storage device.  pros Easy to implement  cons Bad scalability & Bottle neck Data Control Message

12. LOGO 12 Different techniques used of storage virtualization  Implementation methods :  Out-of-band Also known as asymmetric, virtualization devices are sometimes called metadata servers. Require additional software in the host which knows the first request location of the actual data.  pros Scalability & Performance  cons Hard to implement Control Message Data

13. LOGO 13 Different techniques used of storage virtualization In a virtualized storage pool, virtual assets may be dynamically resized and allocated to servers by drawing on the total storage capacity of the SAN Heterogeneous mirroring offers more flexible options than conventional mirroring, including three-way mirroring within storage capacity carved from different storage systems Pooling Heterogeneous Storage Assets Heterogeneous Mirroring

14. LOGO 14 Different techniques used of storage virtualization Heterogeneous Data Replication

15. LOGO 15 Conclusion  Storage virtualization technique :  Virtualization layer File level and block level  Virtualization location Host, network and storage base  Virtualization method In-band and out-of-band  Storage virtualization services  Storage pooling and sharing  Data replication and mirroring  Snapshot and multi-pathing

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