How to run Connected Components example (input graph formatting issue)

[Bryan Rowe <br...@gmail.com>]

I'm having trouble running the connected components example.

This is what the folder looks like:
https://github.com/apache/giraph/tree/release-1.0/giraph-examples/src/main/java/org/apache/giraph/examples

Here is the code:
https://github.com/apache/giraph/blob/release-1.0/giraph-examples/src/main/java/org/apache/giraph/examples/ConnectedComponentsVertex.java

The problem is the input file format.  It's expecting a certain format with
Int,
I can't seem to find the correct input file format file anywhere in this
release (or any release).  I'm expecting IntIntNullIntTextInputFormat file
available, but there isn't one.

I googled that format and found this:
https://apache.googlesource.com/giraph/+/old-move-to-tlp/src/main/java/org/apache/giraph/examples/IntIntNullIntTextInputFormat.java

But the code will not compile with the current project, but that's okay
because I don't want to be limited to Int's anyway.

I would ultimatley like to change the ConnectedComponentsVertex.java code
to use the same input file format that the SSSP example uses, which is:
org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat

How would I go about doing that?
Can I simply change this

public class IntIntNullIntTextInputFormat extends
TextVertexInputFormat<IntWritable, IntWritable, NullWritable,
IntWritable> {

to this:

public class IntIntNullIntTextInputFormat extends
TextVertexInputFormat<Long, Double, Float,
Double> {

or will additional work need to be done?

Thanks,
Bryan

Re: How to run Connected Components example (input graph formatting issue)

[Bryan Rowe <br...@gmail.com>]

CORRECTION

Can I simply change this (from ConnectedComponentsVertex.java)

public class ConnectedComponentsVertex extends Vertex<IntWritable,
    IntWritable, NullWritable, IntWritable> {

to this

public class ConnectedComponentsVertex extends Vertex<Long,
    Double, Float, Double> {





On Mon, Jul 21, 2014 at 2:53 PM, Bryan Rowe <br...@gmail.com> wrote:

> I'm having trouble running the connected components example.
>
> This is what the folder looks like:
>
> https://github.com/apache/giraph/tree/release-1.0/giraph-examples/src/main/java/org/apache/giraph/examples
>
> Here is the code:
>
> https://github.com/apache/giraph/blob/release-1.0/giraph-examples/src/main/java/org/apache/giraph/examples/ConnectedComponentsVertex.java
>
> The problem is the input file format.  It's expecting a certain format
> with Int,
> I can't seem to find the correct input file format file anywhere in this
> release (or any release).  I'm expecting IntIntNullIntTextInputFormat file
> available, but there isn't one.
>
> I googled that format and found this:
>
> https://apache.googlesource.com/giraph/+/old-move-to-tlp/src/main/java/org/apache/giraph/examples/IntIntNullIntTextInputFormat.java
>
> But the code will not compile with the current project, but that's okay
> because I don't want to be limited to Int's anyway.
>
> I would ultimatley like to change the ConnectedComponentsVertex.java code
> to use the same input file format that the SSSP example uses, which is:
> org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat
>
> How would I go about doing that?
> Can I simply change this
>
> public class IntIntNullIntTextInputFormat extends
> TextVertexInputFormat<IntWritable, IntWritable, NullWritable,
> IntWritable> {
>
> to this:
>
> public class IntIntNullIntTextInputFormat extends
> TextVertexInputFormat<Long, Double, Float,
> Double> {
>
> or will additional work need to be done?
>
> Thanks,
> Bryan
>