In my previous blog, I talked about Hive. Hive provides a SQL-like layer on top of Hadoop so you don't have write tons of MapReduce code to query Hadoop and to aggregate and join data. To facilitate working with Hive, Microsoft introduced a Hive ODBC driver (as of this writing, the driver is only available to Hadoop on Azure CTP subscribers). You can use this…
Read articleA long time ago, I wrote a blog about possible reasons for Reporting Services reports to time out. This issue raised its head again; this time in SharePoint 2010 environment where long running reports would time out after about 2 minutes. To resolve: On each Web Front End (WFE) server, edit the web.config file of the SharePoint web application. For the default web application, the…
Read articleWriting MapReduce Java jobs might be OK for simple analytical needs or distributing processing jobs but it might be challenging for more involved scenarios, such as joining two datasets. This is where Hive comes in. Hive was originally developed by the Facebook data warehousing team after they concluded that "… developers ended up spending hours (if not days) to write programs for even simple analyses".…
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In part 1 of my Hadoop adventures, I walked you through the steps of setting the Cloudera virtual machine, which comes with CentOS and Hadoop preinstalled. Now, I'll go through the steps to run a small Hadoop program for analyzing weather data. The program and the code samples can be downloaded from the source code that accompanies the book Hadoop: The Definitive Guide (3rd Edition)…
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With Big Data and Hadoop getting a lot of attention nowadays, I've decided it's time to take a look so I am starting a log of my Hadoop adventures. I hope it'll benefit Windows users especially BI pros. If not, at least I'll keep a track of my experience, so I can recreate it if needed. Before I start, for an excellent introduction to Hadoop…
Read articleScenario: A SharePoint 2010 scale-out farm with two application servers: APP1 – Runs Excel Calculation Services (ECS) APP2 – Runs PowerPivot for SharePoint (R2 or 2010) Do you need to start ECS on APP2 in order for PowerPivot for SharePoint to work? Answer: You don't but if you don't have the updated Analysis Services OLE DB Provider on APP01, you'll get the dreaded "Failed to…
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