document: WS-replication : a framework for highly available web services Due to the rapid acceptance of web services and its fast spreading , a number of mission-critical systems will be deployed as web services in next years . The availability of those systems must be guaranteed in case of failures and network disconnections . An example of web services for which availability will be a crucial issue are those belonging to coordination web service infrastructure , such as web services for transactional coordination ( e.g. , WS-CAF and WS-Transaction ) . These services should remain available despite site and connectivity failures to enable business interactions on a 24x7 basis . Some of the common techniques for attaining availability consist in the use of a clustering approach . However , in an Internet setting a domain can get partitioned from the network due to a link overload or some other connectivity problems . The unavailability of a coordination service impacts the availability of all the partners in the business process . That is , coordination services are an example of critical components that need higher provisions for availability . In this paper , we address this problem by providing an infrastructure , WS-Replication , for WAN replication of web services . The infrastructure is based on a group communication web service , WS-Multicast , that respects the web service autonomy . The transport of WS-Multicast is based on SOAP and relies exclusively on web service technology for interaction across organizations . We have replicated WS-CAF using our WS-Replication framework and evaluated its performance .
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