Common Design Issues:

1. Transparency: User should not be aware of hidden facts of the systems. Types of transparency are-

   • Location
   • Access
   • Migration
   • Relocation
   • Replication
   • Failure
   • Concurrency
   • Persistence

2. Reliability: The system should be fault tolerant to handle failures in DS.

3. Flexibility: The system should be flexible enough to adopt new changes i.e ease of enhancement.
4. Scalability: Increasing no. of devices should not hamper basic working of the system.
5. Performance: The performance of DS should be atleast as good as centralized system.
6. Heterogeneous environment: Since the DS is forming a heterogeneous environment, there is a need to take into consideration heterogeneity.
7. Emulation of existing software: Architecture should support all software supported by centralized system.
8. Security: Data should be secured and should be transmitted securely over the network.