Elastic Memory: Bring Elasticity Back to In-Memory Big Data Analytics.

Recent big data processing systems provide quick answers to users by keeping data in memory across a cluster. As a simple way to manage data in memory, the systems are deployed as long-running workers on a static allocation of the cluster resources. This simplicity comes at a cost: elasticity is lost. Using today's resource managers such as YARN and Mesos, this severely reduces the utilization of the shared cluster and limits the performance of such systems. In this paper, we propose Elastic Memory, an abstraction that can dynamically change the allocated memory resource to improve resource utilization and performance. With Elastic Memory, we outline how we enable elastic interactive query processing and machine learning.