In this paper we describe an algorithm for accessing files over replicated Web Servers. The algorithm breaks the request for a document W , which is assumed to be replicated among N different servers, into N requests such that any K replies are sufficient to reconstruct the whole page. In this way, the document is downloaded from the K fastest servers. The algorithm is feedback-free and does not require any computation to be performed on client or server sides. Thus, it may be implemented on devices with limited computing capabilities. Analytical evaluation of the proposed algorithm shows that, under the model's assumptions, a correctly tuned value for K significantly improves the probability of completing earlier the transfer of W .
Reliable Distribution of Data using Replicated Web Servers / M. Marzolla. - STAMPA. - (2005), pp. 305-309. (Intervento presentato al convegno First International Workshop High Availability of Distributed Systems (HADIS 2005), in conjunction with 16th International Workshop on Database and Expert Systems Applications (DEXA 2005) tenutosi a Copenhagen, Denmark nel 22-26 August 2005) [10.1109/DEXA.2005.163].
Reliable Distribution of Data using Replicated Web Servers
MARZOLLA, MORENO
2005
Abstract
In this paper we describe an algorithm for accessing files over replicated Web Servers. The algorithm breaks the request for a document W , which is assumed to be replicated among N different servers, into N requests such that any K replies are sufficient to reconstruct the whole page. In this way, the document is downloaded from the K fastest servers. The algorithm is feedback-free and does not require any computation to be performed on client or server sides. Thus, it may be implemented on devices with limited computing capabilities. Analytical evaluation of the proposed algorithm shows that, under the model's assumptions, a correctly tuned value for K significantly improves the probability of completing earlier the transfer of W .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
