Replication framework between relational database and document oriented (NOSQL) database

I’m working on a research project of building a replication framework from relational database to document oriented (non-relational/nosql) database system. This is to fulfill the research requirement of the MSc degree. The POC would be developed to demonstrate the solution by using MS SQL Server (relational) and mongoDB (document oriented).  I would like to hear any comments/thoughts about this from the community.


I started a discussion on this in LinkedIn mongoDB user group and received couple of valuable comments. Many thanks for those who given the comments. 


You can see them here.

Multi-Subnet Clustering

This is a new feature in SQL Server 2012. However Windows 2008 has this feature. With the introduction of the new feature, SQL Server can have a cluster node in a different subnet. Subnet is a virtual grouping concept available in network. Subnet will enable network administrators to manage networks effectively over geographical areas. 


Since the subnet is a geographical network concept, now SQL Server clustering can be used as DR (Disaster Recovery) solution than ever before. 


More information can be found here.

VLDBs backup in few seconds

VLDB - Very Large Databases, like several Gigs of databases. (50GB, 100GB, etc) How about managing backups? You may need to spend 20-30 hours to take a full backup of such DBs. Of course SQL Server 2008 has improved backup system than its earlier versions. Another alternative method would be to use third party tools like, LiteSpeed or RedGate backups. But stills you can't make it in few seconds. How about a system to take such a large DB backup in a few seconds? ANSWER is to use SAN snapshot backup.

Introduction to Parallel Programming and MapReduce

This is a very good article published by Google to undsertand the conecpts and practical usage of Parallel Programming and MapReduce.

http://code.google.com/edu/parallel/mapreduce-tutorial.html