1. TECHNOLOGYTECHNOLOGY
CH.BhavaniCH.Bhavani
127R1A05H9127R1A05H9

2. CONTENTSCONTENTS
• IntroductionIntroduction
• Goal of TechnologyGoal of Technology
• ArchitectureArchitecture
• FeaturesFeatures
• AdvantagesAdvantages
• ApplicationsApplications
• Future ScopeFuture Scope
• ConclusionConclusion

3. INTRODUCTIONINTRODUCTION
RAIN stand’s for Reliable Array of Independent
Nodes.
I.A communications component that creates a
redundant network between multiple processors.
II.A computing component that automatically recovers
and restarts applications if a processor fails.
III.A component that stores data across distributed
processors and retrieves it even if some of the
processors fail.

4. EVOLUTIONEVOLUTION
The RAIN technology originated in a research project
at the California Institute of Technology (Caltech),in
collaboration with NASA’s Jet Propulsion Laboratory
and the Defense Advanced Research Projects Agency
(DARPA).
The RAIN research team in 1998 formed a company
called Rainfinity. Rainfinity is a company that
primarily deals with creating clustered solutions for
enhancing the performance and availability.

5. RAINIFINITYRAINIFINITY
• Start-up based on RAIN technology
Company:
• Founded Sept. 1998
• Released first product April 1999
• Received $15 million funding in Dec.
1999
• Now over 50 employees

6. RAINFINITYRAINFINITY
• Business Plan:
Clustered solutions for Internet data
centers, focusing on:
• Availability
• Scalability
• Performance

7. RAIN Project: GoalsRAIN Project: Goals
Efficient, reliable distributed computing
and storage systems:
key building blocks

8. Goals of Rain TechnologyGoals of Rain Technology
• RAIN Technology is able to offer the solution by
minimizing number of nodes in the chain connecting
the client and server.
• RAIN Technology making the exiting nodes more
robust and independent of each other.
• RAIN Technology provides the feature of replacing a
faulty node by a healthy one.

10. TOPOLOGIES IN RAINTOPOLOGIES IN RAIN
TECHNOLOGYTECHNOLOGY

11. STAR TOPOLOGYSTAR TOPOLOGY

12. BUS TOPOLOGYBUS TOPOLOGY

13. RING TOPOLOGYRING TOPOLOGY

14. FEATURESFEATURES
• Communication
• Group Membership
• Data Storage

15. GROUP MEMBERSHIPGROUP MEMBERSHIP
• The main function of group member is to tolerate the
fault.
• Group member ensure that all processes maintain a
consistent view of global membership.
• Token Mechanism:

16. DATA STORAGEDATA STORAGE
Fault tolerance in data storage across many
disks is obtained using redundant storage
schemes. Novel error-correcting codes have
been developed for this purpose. These are
array codes that encode and decode using
simple XOR operations.

17. ADVANTAGESADVANTAGES
• There is no limit on the size of a RAIN cluster.
• There is no concept of master-slave relation.
• A RAIN cluster can tolerate multiple node failure.
• This is highly efficiency in traffic management.
• New node can be added into the cluster to participate
in load sharing.

18. • High Availability Video Server
• High Availability Web Server
• Distributed Check pointing Mechanism

19. FUTURE SCOPEFUTURE SCOPE
• Development of API’s for using the various building
blocks.
• The implementation of a real distributed file system
using the partitioning scheme developed here.
• The group communication protocols are being
extended to address more challenging scenarios.

20. CONCLUSIONCONCLUSION
• The goal of the RAIN project has been to build a test-
bed for various building blocks that address fault
management
• Communication and storage in a distributed
environment
• The creation of such building blocks is important for
the development of a fully distributed computing
system

21. THANK YOU!!THANK YOU!!