Public cloud providers who support a Database-as-a-Service offering must efficiently allocate computing resources to each of their customers in order to reduce the total number of servers needed without incurring SLA violations. For example, Microsoft serves more than one million database customers on its Azure SQL Database platform. In order to avoid unnecesssary expense and stay competitive i...

Data center is the infrastructure of supporting Internet service. Cloud computing is rapidly changing the face of Web Internet service infrastructure, enabling even small organizations to quickly create Web and mobile applications for millions of users by taking advantage of the scale and flexibility of the shared physical infrastructures provided by cloud providers. In this scenario, multiple ...

Modern data-center applications frequently exhibit one-tomany communication patterns and, at the same time, require the fabric to provide sub-millisecond latencies and high throughput. Native IP multicast can achieve these requirements. However, native IP multicast solutions have scalability limitations that make it challenging to offer it as a service for hundreds of thousands of tenants, typi...

The datacenter network is shared among untrusted tenants in a public cloud, and hundreds of services in a private cloud. Today we lack fine-grained control over network bandwidth partitioning across tenants. In this paper we present EyeQ, a simple and practical system that provides tenants with bandwidth guarantees as if their endpoints were connected to a dedicated switch. To realize this goal...

Abstract The existing housing stock is constantly in need of maintenance and renovation. Previous research has showed that renovation projects may force tenants to move involuntarily, there a correlation between the scale project, economic consequences for tenants, relocation frequency. In this paper, aim identify reasons tenants’ choice relocate, based on both quantitative qualitative data. Th...

Abstract In the past decade, Public Rental Housing (PRH) has become program of providing affordable rental housing to low- and middle-income households in China. Even though descriptions governance results are numerous, previous studies not underpinned by a theoretical foundation from perspective, nor have they empirically examined whether PRH works on ground. This explorative empirical paper a...

A major barrier to the adoption of cloud Infrastructure-as-aService (IaaS) is collaboration, where multiple tenants engage in collaborative tasks requiring resources to be shared across tenant boundaries. Currently, cloud IaaS providers focus on multi-tenant isolation, and offer limited or no cross-tenant access capabilities in their IaaS APIs. In this paper, we present a novel attribute-based ...

SaaS (Software as a Service) has been attracted significant attentions from both industry and academia. Owing to serving multiple clients in the Long Tail, many notable SaaS applications have accomplished big successes in many traditional domains, such as CRM (Customer Relationship Management) and HRM (Human Resource Management). To promote the effect and efficiency of the traditional publishin...

In distributed systems shared by multiple tenants, effective resource management is an important pre-requisite to providing quality of service guarantees. Many systems deployed today lack performance isolation and experience contention, slowdown, and even outages caused by aggressive workloads or by improperly throttled maintenance tasks such as data replication. In this work we present Retro, ...