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Database management systems (DBMS) is a common service in clouds. Cloud platforms use virtualization to consolidate servers for efficient resource utilization and to isolate collocated users' workloads. The underlying virtualization technologies have critical impact on the performance and isolation, especially in disk I/O, in DBMS. There are two major virtualization approaches: the hypervisor-based...
Live migration of virtual machines (VMs) is widely used for managing cloud computing platforms. However, live migration causes performance interference on cloud services running on migrated VMs or other VMs collocating with the services during or after migration. Although migration time and downtime are mainly for measuring live migration performance, cloud administrators must take live migration-performance...
This paper presents Pangaea, an inter-data center key-value store that keeps reasonable expandability of storage capacity, data lookup latency and data transfer speed. Pangaea uses two techniques called multi-layered DHT (ML-DHT) and local-first data rebuilding (LDR). ML-DHT provides a global and consistent index of key-value pairs with efficient routings in inter-data center environments. LDR reduces...
Cloud services make use of data center resources so that hosted applications can utilize them as needed. To offer a large amount of computational resources, cloud service providers manage tens of geographically distributed data centers. Since each data center is made up of hundreds of thousands of physical machines, energy consumption is a major concern for cloud service providers. The electric cost...
Infrastructure as a Service (IaaS), a form of cloud computing, is gaining attention for its ability to enable efficient server administration in dynamic workload environments. In such environments, however, updating the software stack or content files of virtual machines (VMs) is a time-consuming task, discouraging administrators from frequently enhancing their services and fixing security holes....
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