(Georgia Institute of Technology, 2004)
Singh, Aameek; Voruganti, Kaladhar; Gopisetty, Sandeep; Pease, David; Liu, Ling
We present HSAN - a hybrid storage area network, which uses both in-band (like NFS) and out-of-band virtualization (like SAN FS) access models. Using hybrid servers that can serve as both metadata and NAS servers, HSAN intelligently decides the access model per each request, based on the characteristics of requested data. This hybrid model is implemented using low overhead cache-admission and cache-replacement schemes and aims to improve overall response times for a wide variety of workloads. Preliminary analysis of the hybrid model indicates performance improvements over both models.
(Georgia Institute of Technology, 2004)
Singh, Aameek; Voruganti, Kaladhar; Gopisetty, Sandeep; Pease, David; Duyanovich, Linda; Liu, Ling
We present an architecture of a trust framework that can be utilized to intelligently tradeoff between security and performance in a SAN file system. The primary idea is to differentiate between various clients in the system based on their trustworthiness and provide them with different levels of security/performance. Client trustworthiness is evaluated dynamically using a customizable trust model by online monitoring of the client's behavior. We also describe the interface of the trust framework with a block level security solution for an out-of-band virtualization based SAN file system (SAN FS). The proposed framework can also be easily extended to provide differential treatment based on data sensitivity, using a configurable parameter of the trust model.