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Posted to commits@flink.apache.org by se...@apache.org on 2014/06/29 16:35:19 UTC
[3/4] git commit: Add various figures for internals. Update text on
internals overview.
Add various figures for internals.
Update text on internals overview.
[ci skip]
Project: http://git-wip-us.apache.org/repos/asf/incubator-flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-flink/commit/c3f88094
Tree: http://git-wip-us.apache.org/repos/asf/incubator-flink/tree/c3f88094
Diff: http://git-wip-us.apache.org/repos/asf/incubator-flink/diff/c3f88094
Branch: refs/heads/master
Commit: c3f8809442e91f0ea377c8a67bdd37fd52e1d4c9
Parents: 5b390d5
Author: Stephan Ewen <se...@apache.org>
Authored: Sun Jun 29 01:18:23 2014 +0200
Committer: Stephan Ewen <se...@apache.org>
Committed: Sun Jun 29 01:19:33 2014 +0200
----------------------------------------------------------------------
docs/internals/ClientJmTm.svg | 245 ++++++++++
docs/internals/JobManagerComponents.svg | 189 ++++++++
docs/internals/general_arch.md | 63 ++-
docs/internals/jobgraph_executiongraph.svg | 453 ++++++++++++++++++
docs/internals/slot_based_scheduling.jpg | Bin 0 -> 66562 bytes
docs/internals/stack.svg | 606 ++++++++++++------------
docs/internals/state_machine.jpg | Bin 0 -> 85236 bytes
7 files changed, 1251 insertions(+), 305 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-flink/blob/c3f88094/docs/internals/ClientJmTm.svg
----------------------------------------------------------------------
diff --git a/docs/internals/ClientJmTm.svg b/docs/internals/ClientJmTm.svg
new file mode 100644
index 0000000..d918b00
--- /dev/null
+++ b/docs/internals/ClientJmTm.svg
@@ -0,0 +1,245 @@
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http://git-wip-us.apache.org/repos/asf/incubator-flink/blob/c3f88094/docs/internals/general_arch.md
----------------------------------------------------------------------
diff --git a/docs/internals/general_arch.md b/docs/internals/general_arch.md
index a2e5ac7..70ac7be 100644
--- a/docs/internals/general_arch.md
+++ b/docs/internals/general_arch.md
@@ -2,7 +2,66 @@
title: "General Architecture and Process Model"
---
-<img src="projects_dependencies.svg" alt="The Flink sub-projects and their dependencies" height="400px"/>
+## The Processes
+
+When the Flink system is started, it bring up the *JobManager* and one or more *TaskManagers*. The JobManager
+is the coordinator of the Flink system, while the TaskManagers are the worksers that execute parts of the
+parallel programs. When starting the systen in *local* mode, a single JobManager and TaskManager are brought
+up within the same JVM.
+
+When a program is submitted, a client is created that performs the pre-processing and turns the program
+into the parallel data flow form that is executed by the JobManager and TaskManagers. The figure below
+illustrates the different actors in the system very coarsely.
+
+<div style="text-align: center;">
+<img src="ClientJmTm.svg" alt="The Interactions between Client, JobManager and TaskManager" height="400px" style="text-align: center;"/>
+</div>
+
+## Component Stack
+
+An alternative view on the system is given by the stack below. The different layers of the stack build on
+top of each other and raise the abstraction level of the program representations they accept:
+
+- The **runtime** layer receive a program in the form of a *JobGraph*. A JobGraph is a generic parallel
+data flow with arbitrary tasks that consume and produce data streams.
+
+- The **optimizer** and **common api** layer takes programs in the form of operator DAGs. The operators are
+specific (e.g., Map, Join, Filter, Reduce, ...), but are data type agnostic. The concrete types and their
+interaction with the runtime is specified by the higher layers.
+
+- The **API layer** implements multiple APIs that create operator DAGs for their programs. Each API needs
+to provide utilities (serializers, comparators) that describe the interaction between its data types and
+the runtime.
+
+<div style="text-align: center;">
+<img src="stack.svg" alt="The Flink component stack" width="800px" />
+</div>
+
+## Projects and Dependencies
+
+The Flink system code is divided into multiple sub-projects. The goal is to reduce the number of
+dependencies that a project implementing a Flink progam needs, as well as to faciltate easier testing
+of smaller sub-modules.
+
+The individual projects and their dependencies are shown in the figure below.
+
+<div style="text-align: center;">
+<img src="projects_dependencies.svg" alt="The Flink sub-projects and their dependencies" height="600px" style="text-align: center;"/>
+</div>
+
+In addition to the projects listed in the figure above, Flink currently contains the following sub-projects:
+
+- `flink-dist`: The *distribution* project. It defines how to assemble the compiled code, scripts, and other resources
+into the final folder structure that is ready to use.
+
+- `flink-addons`: A series of projects that are in an early version. Currently contains
+among other things projects for YARN support, JDBC data sources and sinks, hadoop compatibility,
+graph specific operators, and HBase connectors.
+
+- `flink-quickstart`: Scripts, maven archetypes, and example programs for the quickstarts and tutorials.
+
+
+
+
-<img src="stack.svg" alt="The Flink component stack" height="400px"/>