Abstract:

One significant feature of cloud computing is to offer and utilize resources on demand. It is essential for distributed applications deployed on cloud computing platforms to have the capability of dynamic scaling. The paper researches on the premise of elasticity of distributed applications and approaches to dynamic scaling, and proposes a methodology whose essence is to discover the appropriate pattern for a certain class of applications. The elasticity supporting mechanism is designed and implemented for the pattern. This methodology is applied in Web 2.0 application case, and the corresponding pattern and elasticity supporting mechanism are proposed.

Key words: elasticity;cloud computing;distributed system;pattern