Elasticity has been recognized as one of the most appealing features for users of cloud services. It provides the ability to dynamically and rapidly scaling up or down the allocated computing resources on demand. Are the current elasticity capabilities of the different categories of cloud database services (e.g. Amazon SimpleDB, Amazon RDS, SQL Azure, Google Cloud SQL) meeting this goal?
********Some Paper Proofs *********
** CloudDB AutoAdmin: Towards a Truly Elastic Cloud-Based Data Store
Sherif Sakr, Liang Zhao, Hiroshi Wada, Anna Liu
NICTA and University of New South Wales, Sydney, Australia
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*********Something due to we think its not that we think it is *********
The concept of running applications in clouds is still relatively new. The related technology is still maturing.
Existing software tends to use SQL already. If you want to use an existing CMS platform, chances are it will require a central SQL database.
Most heavy-read workloads can be scaled well using data caching techniques. If applications don’t write data very often, it may not be necessary to scale beyond a single database server.
You must anticipate exactly how the application will use the data, and arrange it just right.
It may be harder to analyze the data. Once your data is arranged in a column store, you may not be able to query it in arbitrary ways. You may only be able to pull it out using it’s id numbers, or by systematically scanning all of it to find the parts you want.
Distributed data storage (aka: NoSQL) systems like Cassandra, Hbase, Redis, etc. are complicated, and there is a considerable learning curve associated with setting them up and maintaining them. In some cases these systems are not as good in terms of data durability or data consistency as the prevailing SQL database systems. These tradeoffs can be difficult to navigate.
Today’s software developers are very familiar with SQL as a data storage and access paradigm. They can very quickly develop software that relies on the ACID qualities of a SQL database.
******** Links ******
**http://greenqloud.com/greenqloud-partners-with-xeround-for-easy-and-green-cloud-database-management/
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*******why elastic ******
Fully ACID compliant relational database service
Point-and-click simple setup & management with web-based interface
Automatic scaling, load balancing and failover
Automated online backup and point-in-time recovery
Database Cloning
database compatibility
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