[ 
https://issues.apache.org/jira/browse/FLINK-7199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16121347#comment-16121347
 ] 

ASF GitHub Bot commented on FLINK-7199:
---------------------------------------

Github user NicoK commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4346#discussion_r132401371
  
    --- Diff: 
flink-libraries/flink-gelly-examples/src/test/java/org/apache/flink/graph/drivers/EdgeListITCase.java
 ---
    @@ -56,214 +56,304 @@ public void testLongDescription() throws Exception {
                        ProgramParametrizationException.class);
        }
     
    +   // CirculantGraph
    +
    +   private String[] getCirculantGraphParamters(String output) {
    +           return parameters("CirculantGraph", output, "--vertex_count", 
"42", "--range0", "13:4");
    +   }
    +
        @Test
        public void testHashWithCirculantGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("CirculantGraph", "hash", "--vertex_count", 
"42", "--range0", "13:4"),
    -                   168, 0x000000000001ae80);
    +           expectedChecksum(getCirculantGraphParamters("hash"), 168, 
0x000000000001ae80);
        }
     
        @Test
        public void testPrintWithCirculantGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("CirculantGraph", "print", "--vertex_count", 
"42", "--range0", "13:4"),
    -                   new Checksum(168, 0x0000004bdcc52cbcL));
    +           expectedOutputChecksum(getCirculantGraphParamters("print"), new 
Checksum(168, 0x0000004bdcc52cbcL));
    +   }
    +
    +   @Test
    +   public void testParallelismWithCirculantGraph() throws Exception {
    +           
TestUtils.verifyParallelism(getCirculantGraphParamters("print"));
    +   }
    +
    +   // CompleteGraph
    +
    +   private String[] getCompleteGraphParamters(String output) {
    +           return parameters("CompleteGraph", output, "--vertex_count", 
"42");
        }
     
        @Test
        public void testHashWithCompleteGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("CompleteGraph", "hash", "--vertex_count", 
"42"),
    -                   1722, 0x0000000000113ca0L);
    +           expectedChecksum(getCompleteGraphParamters("hash"), 1722, 
0x0000000000113ca0L);
        }
     
        @Test
        public void testPrintWithCompleteGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("CompleteGraph", "print", "--vertex_count", 
"42"),
    -                   new Checksum(1722, 0x0000031109a0c398L));
    +           expectedOutputChecksum(getCompleteGraphParamters("print"), new 
Checksum(1722, 0x0000031109a0c398L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithCompleteGraph() throws Exception {
    +           TestUtils.verifyParallelism(getCompleteGraphParamters("print"));
    +   }
    +
    +   // CycleGraph
    +
    +   private String[] getCycleGraphParamters(String output) {
    +           return parameters("CycleGraph", output, "--vertex_count", "42");
        }
     
        @Test
        public void testHashWithCycleGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("CycleGraph", "hash", "--vertex_count", 
"42"),
    -                   84, 0x000000000000d740L);
    +           expectedChecksum(getCycleGraphParamters("hash"), 84, 
0x000000000000d740L);
        }
     
        @Test
        public void testPrintWithCycleGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("CycleGraph", "print", "--vertex_count", 
"42"),
    -                   new Checksum(84, 0x000000272a136fcaL));
    +           expectedOutputChecksum(getCycleGraphParamters("print"), new 
Checksum(84, 0x000000272a136fcaL));
    +   }
    +
    +   @Test
    +   public void testParallelismWithCycleGraph() throws Exception {
    +           TestUtils.verifyParallelism(getCycleGraphParamters("print"));
    +   }
    +
    +   // EchoGraph
    +
    +   private String[] getEchoGraphParamters(String output) {
    +           return parameters("EchoGraph", output, "--vertex_count", "42", 
"--vertex_degree", "13");
        }
     
        @Test
        public void testHashWithEchoGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("EchoGraph", "hash", "--vertex_count", "42", 
"--vertex_degree", "13"),
    -                   546, 0x0000000000057720L);
    +           expectedChecksum(getEchoGraphParamters("hash"), 546, 
0x0000000000057720L);
        }
     
        @Test
        public void testPrintWithEchoGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("EchoGraph", "print", "--vertex_count", 
"42", "--vertex_degree", "13"),
    -                   new Checksum(546, 0x000000f7190b8fcaL));
    +           expectedOutputChecksum(getEchoGraphParamters("print"), new 
Checksum(546, 0x000000f7190b8fcaL));
    +   }
    +
    +   @Test
    +   public void testParallelismWithEchoGraph() throws Exception {
    +           TestUtils.verifyParallelism(getEchoGraphParamters("print"));
    +   }
    +
    +   // EmptyGraph
    +
    +   private String[] getEmptyGraphParamters(String output) {
    +           return parameters("EmptyGraph", output, "--vertex_count", "42");
        }
     
        @Test
        public void testHashWithEmptyGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("EmptyGraph", "hash", "--vertex_count", 
"42"),
    -                   0, 0x0000000000000000L);
    +           expectedChecksum(getEmptyGraphParamters("hash"), 0, 
0x0000000000000000L);
    +   }
    +
    +   @Test
    +   public void testPrintWithEmptyGraph() throws Exception {
    +           expectedOutputChecksum(getEmptyGraphParamters("print"), new 
Checksum(0, 0x0000000000000000L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithEmptyGraph() throws Exception {
    +           TestUtils.verifyParallelism(getEmptyGraphParamters("print"));
    +   }
    +
    +   // GridGraph
    +
    +   private String[] getGridGraphParamters(String output) {
    +           return parameters("GridGraph", output, "--dim0", "2:true", 
"--dim1", "3:false", "--dim2", "5:true");
        }
     
        @Test
        public void testHashWithGridGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("GridGraph", "hash", "--dim0", "2:true", 
"--dim1", "3:false", "--dim2", "5:true"),
    -                   130, 0x000000000000eba0L);
    +           expectedChecksum(getGridGraphParamters("hash"), 130, 
0x000000000000eba0L);
        }
     
        @Test
        public void testPrintWithGridGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("GridGraph", "print", "--dim0", "2:true", 
"--dim1", "3:false", "--dim2", "5:true"),
    -                   new Checksum(130, 0x00000033237d24eeL));
    +           expectedOutputChecksum(getGridGraphParamters("print"), new 
Checksum(130, 0x00000033237d24eeL));
    +   }
    +
    +   @Test
    +   public void testParallelismWithGridGraph() throws Exception {
    +           TestUtils.verifyParallelism(getGridGraphParamters("print"));
    +   }
    +
    +   // HypercubeGraph
    +
    +   private String[] getHypercubeGraphParamters(String output) {
    +           return parameters("HypercubeGraph", output, "--dimensions", 
"7");
        }
     
        @Test
        public void testHashWithHypercubeGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("HypercubeGraph", "hash", "--dimensions", 
"7"),
    -                   896, 0x00000000001bc800L);
    +           expectedChecksum(getHypercubeGraphParamters("hash"), 896, 
0x00000000001bc800L);
        }
     
        @Test
        public void testPrintWithHypercubeGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("HypercubeGraph", "print", "--dimensions", 
"7"),
    -                   new Checksum(896, 0x000001f243ee33b2L));
    +           expectedOutputChecksum(getHypercubeGraphParamters("print"), new 
Checksum(896, 0x000001f243ee33b2L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithHypercubeGraph() throws Exception {
    +           
TestUtils.verifyParallelism(getHypercubeGraphParamters("print"));
    +   }
    +
    +   // PathGraph
    +
    +   private String[] getPathGraphParamters(String output) {
    +           return parameters("PathGraph", output, "--vertex_count", "42");
        }
     
        @Test
        public void testHashWithPathGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("PathGraph", "hash", "--vertex_count", "42"),
    -                   82, 0x000000000000d220L);
    +           expectedChecksum(getPathGraphParamters("hash"), 82, 
0x000000000000d220L);
        }
     
        @Test
        public void testPrintWithPathGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("PathGraph", "print", "--vertex_count", 
"42"),
    -                   new Checksum(82, 0x000000269be2d4c2L));
    +           expectedOutputChecksum(getPathGraphParamters("print"), new 
Checksum(82, 0x000000269be2d4c2L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithPathGraph() throws Exception {
    +           TestUtils.verifyParallelism(getPathGraphParamters("print"));
    +   }
    +
    +   // RMatGraph
    +
    +   private String[] getRMatGraphParamters(String output, String simplify) {
    +           if (simplify == null) {
    +                   return parameters("RMatGraph", output, "--scale", "7");
    +           } else {
    +                   return parameters("RMatGraph", output, "--scale", 
"7","--simplify", simplify);
    +           }
        }
     
        @Test
        public void testHashWithRMatGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("RMatGraph", "hash", "--scale", "7"),
    -                   2048, 0x00000000001ee529);
    +           expectedChecksum(getRMatGraphParamters("hash", null), 2048, 
0x00000000001ee529);
        }
     
        @Test
        public void testPrintWithRMatGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("RMatGraph", "print", "--scale", "7"),
    -                   new Checksum(2048, 0x000002f737939f05L));
    +           expectedOutputChecksum(getRMatGraphParamters("print", null), 
new Checksum(2048, 0x000002f737939f05L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithRMatGraph() throws Exception {
    +           TestUtils.verifyParallelism(getRMatGraphParamters("print", 
null));
        }
     
        @Test
        public void testHashWithDirectedRMatGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("RMatGraph", "hash", "--scale", "7", 
"--simplify", "directed"),
    -                   1168, 0x00000000001579bdL);
    +           expectedChecksum(getRMatGraphParamters("hash", "directed"), 
1168, 0x00000000001579bdL);
        }
     
        @Test
        public void testPrintWithDirectedRMatGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("RMatGraph", "print", "--scale", "7", 
"--simplify", "directed"),
    -                   new Checksum(1168, 0x0000020e35b0f35dL));
    +           expectedOutputChecksum(getRMatGraphParamters("print", 
"directed"), new Checksum(1168, 0x0000020e35b0f35dL));
    +   }
    +
    +   @Test
    +   public void testParallelismWithDirectedRMatGraph() throws Exception {
    +           TestUtils.verifyParallelism(getRMatGraphParamters("print", 
"directed"));
        }
     
        @Test
        public void testHashWithUndirectedRMatGraph() throws Exception {
    -           expectedChecksum(
    -                   parameters("RMatGraph", "hash", "--scale", "7", 
"--simplify", "undirected"),
    -                   1854, 0x0000000000242920L);
    +           expectedChecksum(getRMatGraphParamters("hash", "undirected"), 
1854, 0x0000000000242920L);
        }
     
        @Test
        public void testPrintWithUndirectedRMatGraph() throws Exception {
                // skip 'char' since it is not printed as a number
                Assume.assumeFalse(idType.equals("char") || 
idType.equals("nativeChar"));
     
    -           expectedOutputChecksum(
    -                   parameters("RMatGraph", "print", "--scale", "7", 
"--simplify", "undirected"),
    -                   new Checksum(1854, 0x0000036fe5802162L));
    +           expectedOutputChecksum(getRMatGraphParamters("print", 
"undirected"), new Checksum(1854, 0x0000036fe5802162L));
    +   }
    +
    +   @Test
    +   public void testParallelismWithUndirectedRMatGraph() throws Exception {
    +           TestUtils.verifyParallelism(getRMatGraphParamters("print", 
"undirected"));
    +   }
    +
    +   // SingletonEdgeGraph
    +
    +   private String[] getSingletonEdgeGraphParamters(String output) {
    --- End diff --
    
    `getSingletonEdgeGraphParameters`


> Graph simplification does not set parallelism
> ---------------------------------------------
>
>                 Key: FLINK-7199
>                 URL: https://issues.apache.org/jira/browse/FLINK-7199
>             Project: Flink
>          Issue Type: Bug
>          Components: Gelly
>    Affects Versions: 1.3.1, 1.4.0
>            Reporter: Greg Hogan
>            Assignee: Greg Hogan
>            Priority: Minor
>
> The {{Simplify}} parameter should accept and set the parallelism when calling 
> the {{Simplify}} algorithms.



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