To find an idle workstation? How to transfer a process from one workstation to another workstation in a transparent manner? What happens to the remote process when a user logs on to that workstation and a home process is created?Ĭonsists of multiple workstations (diskless) coupled with powerful servers with extra hardware to store the file systems and other software like databasesĬonsists of multiple processors: a pool of processors and a group of workstations This model is not very easy to implement, since several issues need to be resolved. Workstation model Workstation–server model Processor-pool modelĬonsists of network of personal computers, Each one with its own hard disk and local file system Interconnected over the network Shared memory architectures / Tightly coupled systems easierĭistributed memory architectures / Loosely coupled systems offerĪ superior price performance ratio and are scalable Concurrent transactions (operations which involve accounts in different banks simultaneous access from several users, etc) Fault tolerance Requirements of Distributed systems Nationalized Bank with multiple Branch Offices Tanenbaum’s definition of a distributed system: “ A distributed system is a collection of independent computers that appear to the users of the system as a single coherent system.” DISTRIBUTED COMPUTING By Sunita Mahajan & Seema Shah Presented By Prof.
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