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In this paper we consider the data caching problem in next generation data services in the cloud, which is characterized by using monetary cost and access trajectory information to control cache replacements, instead of exploiting capacityoriented strategies as in traditional research. In particular, given a stream of requests to a shared data item with respect to a homogeneous cost model, we first...
NFV together with SDN promises to provide more flexible and efficient service provision methods by decoupling the network functions (NFs) from the physical network topology and devices, but requires the real-time and automatic composition and verification for service function chain (SFC). However, most of SFCs today are still typically built through manual configuration processes, which are slow and...
Transaction logging and snapshotting are techniquesused to deliver durability to the data in in-memory data stores. Absolute durability guarantees are delivered to a system bysequentially recording the transaction logs and snapshots to anon-volatile disk. Recent advancements in database restorationtechniques have given rise to lock-free fuzzy snapshots. Stillthe transaction log that completes the...
Parallel file systems (PFS) are commonly used in high-end computing systems. With the emergence of solid state drives (SSD), hybrid PFSs, which consist of both HDD and SSD servers, provide a practical I/O system solution for data-intensive applications. However, most existing PFS layout schemes are inefficient for hybrid PFSs due to their lack of awareness of the performance differences between heterogeneous...
In cloud services, users may frequently be required to reveal their personal private information which could be stored in the cloud to used by different parts for different purposes. However, in a cloud-wide storage network, the servers are easily under strong attacks and also commonly experience software/hardware faults. As such, the private information could be under great risk in such an untrusted...
We demonstrate the disaster resilience of electric power applications for software defined disaster recovery center networking (SD-DRCN) based on elastic optical network. The overall feasibility and performances of the architecture are verified in our study.
In this paper, we study the problem of dynamically migrating a service in Clouds to satisfy a sequence of mobile batch-request demands in a cost effective way. The service may have a single or multiple replicas, each running on a virtual machine. As the origins of the mobile accesses are frequently changed over time, this problem is particularly important to those time-bounded services to achieve...
In this paper, we propose a new video scrambling and fingerprint embedding method for digital right protection. In this method, a video clip is embedded with v Gaussian watermarks and then scrambled and multi casted from a content server to U clients. A BIBD-based methodology is applied to determine the needed number (v) of sub keys for a total of U clients. In the mean time, the server also decomposes...
With the boom of social media, it has become increasingly easier for ordinary people to not only post their own content but share other people's content on the Internet. In this paper, we conceptualize a growing problem of moving user data - once a user posts some content on the Internet, the data is largely out of her control, the content can be forwarded to or shared with other people, applications...
With the college effective development of information process, college information service platform had been the effective approach for scientific research of staff and students. This paper proposed the construction planning of college information service platform based on the demand-driven information resource, which based on analyses on the employment situation of college graduates; and discussed...
With the booming trend of cloud computing, on-demand resource management is overwhelming static and dedicated strategy. The increasing demands introduce multiple challenges including energy efficiency, performance enhancement, and fault tolerance. Virtualized computing environment decouples OS and applications with hardware to best facilitate these on-demand cloud services. In this paper, we propose...
Organization and Management of mass multi-source spatial data are core functions of digital earth software which contribute directly to the availability and efficiency of the software itself. A novel organization and index method which combines the UTM latitude-longitude grids index and the dynamic level of detail model to organize data logically and use the "polymerization file" to store...
With the improvement of software security, attacks based on RPC vulnerabilities declined, however, attacks based on client application software vulnerabilities have increased. Such client application software includes Web browsers, email client and office. The spread of malware using these software vulnerabilities has become a severe threat to todaypsilas Internet. In allusion to this kind of threat,...
Proxy cache which is an important device to guarantee the quality of Web service works with a poor efficiency when hot-spot appears. To solve this problem, load balancing method should be applied. In this paper, a load balancing model based on ant colony behavior is put forward. In the model, agent monitors the status of proxy server it has been installed on. Based on that status, if it judges that...
A novel wayfinding system is presented with an aim to increase workplace and life independence for cognitive-impaired patients such as people with traumatic brain injury, cerebral palsy, mental retardation, schizophrenia, and Alzheimerpsilas disease. According to psychological model of spatial navigation and the requirements of rehabilitation professionals, PDAs prompting with spatial photos at the...
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