Naming, Trading, Directory and Discovery Services (CDK â chap.9)
Naming, Trading, Directory and Discovery Services (CDK â chap.9)
Naming, Trading, Directory and Discovery Services (CDK â chap.9)
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<strong>Trading</strong> & <strong>Discovery</strong>Locating objects in location transparent way<strong>Naming</strong> simple but may not be suitable when• clients do not know server• there are multiple servers to choose fromInappropriate if client wants to use a service of a certain quality but doesnot know /care who from• Video on dem<strong>and</strong>,• Electronic commerce.<strong>Trading</strong> supports locating servers based on service functionality <strong>and</strong>quality.<strong>Naming</strong> = White pages<strong>Trading</strong> = Yellow PagesTrader operates as broker between client <strong>and</strong> server.Enables client to change perspective from ´who?´ to ´what?´Ian Johnson 70 Distributed Systems
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