High availability in clustered multimedia servers
Renu Tewari, Daniel M. Dias, et al.
ICDE 1996
Numerous studies show that proxy cache miss ratios are typically at least 40%-50%. This paper proposes and evaluates a new approach for improving the throughput of proxy caches by reducing cache miss overheads. An embedded system able to achieve significantly better communications performance than a traditional proxy filters the requests directed to a proxy cache, forwarding the hits to the proxy and processing the misses itself. This system, called a Proxy Accelerator, uses hints of the proxy cache content and may include a main memory cache for the hottest objects. Scalability with the Web proxy cluster size is achieved by using several accelerators. We use analytical models and trace-based simulations to study the benefits and the implementation tradeoffs of this new approach. A single proxy accelerator node in front of a four-node Web proxy improves the cost-performance ratio by about 40%. Implementation choices that do not affect the overall hit ratio are available.
Renu Tewari, Daniel M. Dias, et al.
ICDE 1996
A. Iyengar, Daniel M. Dias
ICDCS 1998
Renu Tewari, Rajat Mukherjee, et al.
ICMCS 1996
Daniel M. Dias, Ambuj Goyal, et al.
RIDE 1992