I need help with the following four end of chapter 6 and chapter 21 questions:
6.9 In publish-subscribe systems, explain how channel-based approaches can trivially be implemented
using a group communication service? Why is this a less optimal strategy for implementing a content-
based approach?
6.1 Construct an argument as to why indirect communication may be appropriate in volatile
environments. To what extent can this be traced to time uncoupling, space uncoupling or indeed a
combination of both?
21.2 The key requirements for the Google
infrastructure are scalability, reliability, performance and openness. Provide
three example of where these requirements might be in conflict and discuss how
Google deals with these potential conflicts.
21.5 Explain why the Google infrastructure
supports three separate data storage facilities. Why does Google not just adopt
a commercial distributed database instead of utilizing the three separate
services? page 935
LINK TO BOOK
com/2013/09/george-coulouris-distributed-systems-concepts-and-design-5th-edition.pdf”>https://azmuri.files.wordpress.com/2013/09/george-coulouris-distributed-systems-concepts-and-design-5th-edition.pdf
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