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POIncremental MapReduce in c#.net
 

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  1. POIncremental MapReduce in c#.net
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    <p>I have data of following format..</p> <p>Type C_ID Assitor CollectionDate granulity counter</p> <p>A a 10 08-08-2012 00:00 15 0.9912378</p> <p>B a 5 08-08-2012 00:00 15 0.1860929</p> <p>C b 4 08-08-2012 00:00 15 0.5345317</p> <p>D c 1 08-08-2012 00:15 15 0.8656529</p> <p>E b 1 08-08-2012 00:15 15 0.3249502</p> <p>A a 10 08-08-2012 00:15 15 0.3743117</p> <p>B a 5 08-08-2012 00:30 15 0.2608622</p> <p>C b 4 08-08-2012 00:30 15 0.0079308</p> <p>D c 1 08-08-2012 00:30 15 0.7094781</p> <p>E b 1 08-08-2012 00:45 15 0.6133461</p> <p>A a 10 08-08-2012 00:45 15 0.3035875</p> <p>B a 5 08-08-2012 00:45 15 0.6093015</p> <p>C b 4 08-08-2012 01:00 15 0.4104008</p> <p>D c 1 08-08-2012 01:00 15 0.1687753</p> <p>E b 1 08-08-2012 01:00 15 0.6627076</p> <p>A a 10 08-08-2012 01:15 15 0.1901386 .....</p> <p>and so on..</p> <p>I want to do incremental mapreduce on this table on hourly basis.. on CollectionDate is the field which show when the records are coming.. But all this code I want in c#.net</p> <p>I have done mapReduce but problem is I am getting 3 records every 15 minutes and 12Records every hour and after 1 hour these 15 records will be reduced.. and after next 1 hour again the rest of records will be reduced on same basis..</p> <p>Can I get help on this in c#.net only.. I am in deep trouble since last 20 Days..</p> <p>Its excess csv file.. from where i am getting the record.. n inserting into mongodb using c#.. in mongodb its look like sumthing this: { "_id": a324b2f89d2e98fa21f, "Type" : A, "C_ID" : a, "assitor" : 10, "CollectionDate" : 08-08-2012 00:00, "Granulity" : 15, "Counter" : 0.1901386 } { "_id": a324b2f89d2e98a216f, "Type" : B, "C_ID" : a, "assitor" : 10, "CollectionDate" : 08-08-2012 00:00, "Granulity" : 15, "Counter" : 0.1233542 } { "_id": a324b2f89d2e98a3f2c, "Type" : A, "C_ID" : b, "assitor" : 12, "CollectionDate" : 08-08-2012 00:15, "Granulity" : 12, "Counter" : 0.8134552 } { "_id": a324b2f89d2e98b4e2d, "Type" : B, "C_ID" : b, "assitor" : 12, "CollectionDate" : 08-08-2012 00:15, "Granulity" : 12, "Counter" : 0.3218547 }</p> <p>OutputFile: { "_id" : a8f3e231d456a675b23c, "CollectionDate": 08-08-2012 00:00 "AvgCounter" : } { "_id" : a8f3e232456a675a42cd, "CollectionDate": 08-08-2012 01:00 "AvgCounter" : } { "_id" : a8f3e231d46a67a0b4d2, "CollectionDate": 08-08-2012 02:00 "AvgCounter" : } </p> <p>means hourly aggregated..</p> <p>Till What I have done...</p> <pre><code>private static void MapReduce(MongoDatabase db, String collName, BsonValue bsonValue, DateTime oldDateTime, DateTime newDateTime) { var collection = db.GetCollection&lt;BsonDocument&gt;(collName); Console.WriteLine(TotalReduction++); String map = @"function() { var sample = this; emit(sample.CollectionDate, {CID: sample.C_ID, count:1, CollectionTime: sample.CollectionDate}); }"; String reduce = @"function(key, values) { var result = {CID: '', count:0}; values.forEach(function(value){ result.CID += value.CID; result.count += value.count; result.CollectionTime = value.CollectionTime; }); return result; }"; var options = new MapReduceOptionsBuilder(); IMongoQuery[] queries = { Query.EQ("CollectionTime", bsonValue) }; options.SetOutput(MapReduceOutput.Inline); IMongoQuery query = Query.And(queries); var results = collection.MapReduce(queries[0], map, reduce); collection = db.GetCollection&lt;BsonDocument&gt;("MSS_REDUCE"); IEnumerable&lt;BsonDocument&gt; bdoc = results.GetResultsAs&lt;BsonDocument&gt;(); collection.InsertBatch&lt;BsonDocument&gt;(bdoc); } </code></pre> <p>Thanks Ravi Sharma</p>
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    1. PTQuestion
    1. USRavi Sharma
    1. USRavi Sharma
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      1. POIncremental MapReduce in c#.net
      1. USRavi Sharma
      1. VTFavorite
    1. COYou have given us a flat file schema. What do your documents look like in mongodb?
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      1. POIncremental MapReduce in c#.net
      1. USCraig Wilson
    2. COits excess csv file.. from where i am getting the record.. n inserting into mongodb using c#.. in mongodb its look like sumthing this: { "_id": a324b2f89d2e98fa21f, "Type" : A, "C_ID" : a, "assitor" : 10, "CollectionDate" : 08-08-2012 00:00, "Granulity" : 15, "Counter" : 0.1901386 } { "_id": a324b2f89d2e98fa21f, "Type" : B, "C_ID" : b, "assitor" : 12, "CollectionDate" : 08-08-2012 00:15, "Granulity" : 12, "Counter" : 0.3485126 }
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      1. POIncremental MapReduce in c#.net
      1. USRavi Sharma
    3. COAnd what is your intended result? You have mentioned what you are doing and what the problem is, but not what you are trying to achieve...
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      1. POIncremental MapReduce in c#.net
      1. USCraig Wilson
 

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