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Diffstat (limited to 'chapter/4')
| -rw-r--r-- | chapter/4/dist-langs.md | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/chapter/4/dist-langs.md b/chapter/4/dist-langs.md index 8bf98f6..0477199 100644 --- a/chapter/4/dist-langs.md +++ b/chapter/4/dist-langs.md @@ -6,10 +6,27 @@ by: "A Systems Person" ## Problems of Distributed Programming -* Partial failure -* Consistency (Concurrency) -* Efficiency (Latency) -* Scallability +There are problems that exist in distributed system environments that do not exist in single-machine environments. +For example, programs running on distributed systems must be resilient to partial failure. +In a single-machine environment, a program is either running or crashed. +When instructions are distributed accross multiple machines, the program can be running, crashed, or partially crashed. +Programs, systems, and languages designed for distribution must be able to tolerate problems such as partial failure. +Furthermore, they must abstract some or all of these problems from the application developer and application logic. + +### Partial Failure + +On a single-machine environment, a crash means that either the machine has failed (total failure), or the source of the crash can be learned from a central resource manager such as the operating system. (// TODO cite "a note on dist. comp.) +If an application consists of multiple communicating processes, it is possible for some components to remain running when others have crashed. + +### Consistency (Concurrency) + + + +### Efficiency (Latency) + + + +### Scallability For the above points cite "A Note on Distributed Computing," "Fallacies of Distributed Computing Explained" @@ -93,7 +110,7 @@ Another definition: * Compiler / Runtime: * Hardware -### Why GPL's not DSL's? +### Why DSL's as Libraries? Reasons for moving to GPL's as base for DSL's |