3. Image Processing Image Processing Windows HPC Server 2008 HPC Job Scheduler Dryad DryadLINQ Machine Learning Graph Analysis Graph Analysis Data Mining.NET Applications … Windows HPC Server 2008

5. Processing vertices Channels (file, fifo, pipe) Inputs Outputs

6. 6

10. Query plan LINQ query Dryad logs where select Automatic query plan generation Distributed query execution by Dryad var logentries = from line in logs where !line.StartsWith("#") select new LogEntry(line);

15. \\HPCMETAHN01\XC\output\520a0fcf\Part.00000000

17. Go through logs and keep only lines that are not comments. Parse each line into a new LogEntry object. Go through logentries and keep only entries that are accesses by jvert. Group jvert accesses according to what page they correspond to. For each page, count the occurrences. Sort the pages jvert has accessed according to access frequency.

18. logentries user logs accesses htmAccesses output

21. List of files to be shipped to the cluster Vertex definitions

25. public static Vector NearestCenter(Vector v, IEnumerable centers) { return centers.Aggregate((r, c) => (r - v).Norm2() < (c - v).Norm2() ? r : c); } public static IQueryable Step(IQueryable vectors, IQueryable centers) { return vectors.GroupBy(point => NearestCenter(point, centers)).Select(group => group.Aggregate((x,y) => x + y) / group.Count()); } var vectors = PartitionedTable.Get ("vectors.pt"); IQueryable centers = vectors.Take(100); for (int i = 0; i < 10; i++) { centers = Step(vectors, centers); } centers.ToPartitionedTable (“centers.pt”); public class Vector { public double[] entries; [Associative] public static Vector operator +(Vector v1, Vector v2) { … } public static Vector operator -(Vector v1, Vector v2) { … } public double Norm2() {…} }

36. Built by Developers for Developers….

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