About storage area network

1. Policy Based Validation of SAN Configuration
SATWIK KUMAR
1RV13CS141
Department of Computer Science and Engineering
R V College of Engineering, Bangalore

2. Presentation Outline
INTRODUCTION
Storage Area Network
Network Area Storage
SAN v/s NAS
BODY
Awareness of global effects of the product/topic
Understanding of economic factors
Awareness of contemporary issues
Understanding of Professional Issues
Literature survey
Data Structures
Computer Organization and Architecture
Digital Logic and Design
Discrete Mathematical Structure
Future work for next Phase
REFERENCES

3. Introduction to Storage Area
Network
High-speed network of storage elements.
Establishes direct and indirect connections between
multiple servers and storage devices.

4. Network Area Storage
File-level computer data storage connected to
a computer network.
Provides data access to heterogeneous group of
clients.
SAN V/S NAS

5. Awareness of global effects of the
product/topic
Users can access data globally, from multiple locations
around the world, quickly and transparently without
breaking budgets.
Once restricted to large organizations and mainframe
environments, is becoming more common in mid-sized
organizations.
SAN adoption has grown from a market share of a little
over 20% in 2000 to nearly 60% in 2010.

6. Understanding of economic factors
Increasing Number of Enterprises
Increasing Requirements on Data Availability.
Reduced cost of external storage.
Best and Superior performance.
High Degree of Fault Tolerance.

7. Awareness of contemporary issues
Installation of SAN is still a highly complex and
lengthy procedure.
A poorly designed SAN can itself be a single point of
failure for large volume of data.
Incompatibility issues.

8. Understanding of Professional Issues
One of the key challenges of SAN management is the
large number of configuration problems that are
encountered when
(a) adding/removing devices in an existing SAN.
(b) provisioning new storage.
(c) upgrading firmware or device drivers.
(d) trying to ensure a certain level of reliability and
security in the SAN.

9. Literature survey
Data Structures
Hard Coding
It is a software development practice in which
program is directly written into the source code
manually.
This may cause a program bug.
It is difficult for a human to determine conflicts
between rules, assign priorities, and specify the
sequence of execution of the rules.

10. Digital Logic and Design
Fibre Channel Protocol
It is a transport protocol that predominantly
transports commands over Fibre Channel networks.
Provides the highest performance levels.
Designed for mission-critical applications.
Cost of components is relatively high.
Relatively difficult to implement and manage.

11. Computer Organization and
Architecture
Host Bus Adapters(HBA)
They are part of the storage network.
It is the interface between the server and the attached Fibre
Channel network.
It provides I/O processing.
(Basic SAN Configuration)
LAN
Tape Library
HBA HBA
Switch
Controller
Storage Array
Backup
Server
Server Server

12. Discrete Mathematical Structure
Graph Theory.
Used for Developing Architecture of Storage Area Network
Permutation And Combination.
Used to allocate Memory in the Disk Arrays.
Collection Policies.
Policies that validate properties of a group of SAN
components. An example policy is “All HBAs in a host should
be from the same manufacturer”.

13. Future work for next phase
Architecture Details of policy based validation of
Configuration.
Policy Evaluator.
Policy Request Generator.
Action Handler.
Collection Policies

14. References
[1]http://ieeexplore.ieee.org/xpl/Policy-Based Validation of SAN
Configuration
[2] M. Bearden, S. Garg, and W. J. Lee. Integrating Goal
Specification in Policy Based Management. In Proc. of IEEE
Policy 2001, January 2001.
[3] R. Chadha, Y.-H. Cheng, T. Cheng, S. Gadgil, A. Hafid, K.
Kim, G. Levin, N. Natarajan, K. Parmeswaran, A. Poylisher,
and J. Unger. PECAN: Policy-enabled configuration across
networks. In Proc. of IEEE Policy 2003, June 2003.
[4] http://en.wikipedia.org/wiki/Network-attached_storage.
[5] http://en.wikipedia.org/wiki/Storage_area_network.

15. Thank You