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ALP User Documentation 0.7.0
Algebraic Programming User Documentation
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The state of the vertex-center Pregel program that the user may interface with. More...
#include <pregel.hpp>
Public Attributes | |
| bool & | active |
| Represents whether the current vertex is active. More... | |
| const size_t & | indegree |
| The in-degree of this vertex. | |
| const size_t & | num_edges |
| The number of edges in the global graph. | |
| const size_t & | num_vertices |
| The number of vertices in the global graph. | |
| const size_t & | outdegree |
| The out-degree of this vertex. | |
| const size_t & | round |
| The current round the vertex-centric program is currently executing. | |
| const size_t & | vertexID |
| A unique ID of this vertex. More... | |
| bool & | voteToHalt |
| Represents whether this (active) vertex votes to terminate the program. More... | |
The state of the vertex-center Pregel program that the user may interface with.
The state includes global data as well as vertex-centric state. The global state is umodifiable and includes:
Vertex-centric state can be either constant or modiable:
| bool& active |
Represents whether the current vertex is active.
Since this struct is only to-be used within the computational phase of a vertex-centric program, this always reads true on the start of a round.
The program may set this field to false which will cause this vertex to no longer trigger computational steps during subsequent rounds.
An inactive vertex will no longer broadcast messages.
If all vertices are inactive the program terminates.
| const size_t& vertexID |
A unique ID of this vertex.
This number is an unsigned integer between 0 (inclusive) and the number of vertices the underlying graph holds (exclusive).
| bool& voteToHalt |
Represents whether this (active) vertex votes to terminate the program.
On start of a round, this entry is set to false. If all active vertices set this to true, the program will terminate after the current round.
1.9.3