Hi, folks! I have started small research of Giraph framework and I have not much experience with Giraph and Hadoop :-(.
I would like to ask several questions about how things are working in Giraph which are not straightforward for me. I am trying to use the sources but sometimes it is not too easy ;-) So here they are: 1) How Workers are assigned to TaskTrackers? 2) How vertices are assigned to Workers? Does it depend on distribution of input file on DataNodes? Is there available any choice of distribution politics or no? 3) How Workers and Map tasks are related to each other? (1:1)? (n:1)? (1:n)? 4) Can Workers migrate from one TaskTracker to the other? 5) What is the best way to monitor Giraph app execution (progress, worker assignment, load balancing etc.)? I think this is all for the moment. Thank you. Testbed description: Hardware: 8 node dual-CPU cluster with IB FDR. Giraph: release-1.0.0-RC2-152-g585511f Hadoop: hadoop-0.20.203.0, hadoop-rdma-0.9.8 Best, Alex
