186508162-VIRTUALIZATION.pptx

1. VIRTUALIZATIO
N
-SHALINI JAISWAL

2. Virtualization ?
A technique of masking or abstracting physical resources
 simplifies the infrastructure
 accommodates increasing pace of business and
technological changes
 simplifies resource management
- pooling and sharing resources with enhanced
capabilities.
 Reduce downtime and improve performance

3. Forms of Virtualization
Forms of
Virtualization
Memory
Virtualization
Server
Virtualization
Storage
Virtualization
Network
Virtualization

4. Memory
Virtualization  Each application has its own
contiguous logical memory
independent of physical
memory.
 memory address space is
divided into contiguous
blocks of fixed-size pages.
-paging
-swap files

5. Benefits of memory
virtualization
 Higher memory utilization
-sharing contents
-consolidating more virtual machines on a physical host.
 Ensuring some memory space exists before halting services until
memory frees up.
 Access to more memory than the chassis can physically allow.
 Advanced server virtualization functions, like live migrations.

6. Network Virtualization
 Virtual networks where each
application sees its own logical
network independent of physical
network.
 VLANs make large networks more
manageable by enabling centralized
configuration of devices

7. Benefits of network
virtualization
 Service orientation
 Better Change control
 Cost savings
 Security
 Flexible
 Improving network performance

8. Virtual SAN
 A virtual SAN or virtual fabric is a recent evolution of SAN and
functions as VLAN.
 VSAN technology enables users to build one or more Virtual
SANs on a single physical topology containing switches and
ISLs.
 Improves scalability, availability, and security of SAN.

9. Features of VSAN
 Fibre Channel ID (FC ID) of a host in a VSAN can be assigned
to a host in another VSAN, thus improving scalability of SAN.
 Every instance of a VSAN runs all required protocols such as
FSPF, domain manager, and zoning.
 Fabric-related configurations in one VSAN do not affect the
traffic in another VSAN.
 Events causing traffic disruptions in one VSAN are contained
within that VSAN and are not propagated to other VSANs.

10. Server Virtualization
 Each application sees its own logical server, independent of
physical servers.
 Multiple operating systems and applications run
simultaneously on different virtual machines on same
physical server .
 Server virtualization addresses the issues that exist in a
physical server environment.

11. Server Virtualization

12. Benefits of server
virtualization
 Reduce number of servers
 Reduce total cost of ownership
 Improve availability and business continuity
 Increase efficiency for development and test environments

13. Storage Virtualization
 Process of presenting a logical view of the physical storage
resources to a host.
 This logical storage appears and behaves as physical storage
directly connected to the host.
 Examples of storage virtualization are:
 Host-based volume management
 LUN creation
 Tape virtualization

14. Benefits of
Storage
Virtualization
 Increased storage utilization
 Adding or deleting storage
without affecting application’s
availability
 Non-disruptive data migration

15. SNIA Storage Virtualization
Taxonomy

16. Storage Virtualization – a Multi-
Level Approach

17. Storage Virtualization
Configuration
Out-of-band
implementation
 Virtualized environment
configuration is stored external
to the data path
 Virtualization appliance is
hardware-based and optimized
for fiber channel
 Enables data to be processed at
network speed
 More scalable

18. Storage Virtualization
Configuration
In-band implementation
 Virtualization function is placed in the
data path
 Virtualization appliance is software-
based and runs on general-purpose
servers
 During processing, data storing and
forwarding through the appliance
results in additional latency
 Less scalable – only suitable for static
environment with predictable
workloads

19. Storage Virtualization
Challenges
1. Scalability
 Without virtualization, each storage array is managed independently
to meet application requirements in terms of capacity and IOPS
 With virtualization, the environment as a whole must be analyzed
2. Functionality
 Virtualized environment must provide same or better functionality
 Must continue to leverage existing functionality on arrays
3. Manageability
 Virtualization device breaks end-to-end view of storage
infrastructure
 Must integrate with existing management tools
4. Support
 Interoperability in multivendor environment

20. Block-Level Storage
Virtualization
 Ties together multiple
independent storage arrays
 Presented to host as a single
storage device
 Hosts are directed to
virtualized volumes on the
virtualization device
 Mapping is done to redirect
I/O on this virtual storage
device to underlying
physical arrays
 Deployed in a SAN environment
 Non-disruptive data mobility and
data migration
 Enable significant cost and
resource optimization

21. File-Level Virtualization
 Break dependencies between end-user
access and data location
 Storage utilization is optimized
 Non-disruptive migrations
NAS Devices/Platforms
After File-Level Virtualization
IP
Network
Clients Clients
Storage
Array
File
Server
File
Server
Virtualization
Appliance
• Every NAS device is an independent
entity, physically and logically
• Underutilized storage resources
• Downtime caused by data migrations
NAS Devices/Platforms
Before File-Level Virtualization
IP
Network
Storage
Array
File
Server
File
Server
Clients Clients