You might hit an exception while sdding MSCHART to your Windows azure Web Role and WCF service could cause exception as below: Create a new Windows Azure ASP.NET Webrole Add a new WCF Web Role to it Build and verify that it does works in...

I am writing the detail below on how you can hit BP at Application_Start() in Global.asax.cs: First you can write Debugger.Break() code in your Application_Start() as below: Now please open your Role Properties > Web and select 1.Use Visual...

Burp is a great tool to use REST API directly in the GUI. I have written this blog to understand how to configure Burp to Manage Windows Azure subscription and services using REST API. You can download the tool below: http://portswigger.net/burp/proxy...

Time to time I need to use my Windows Azure Subscription Profile information however when I want I could never find and searching the link over internet could never get me the configuration file immediately so I created this blog. To get PublishSetting...

As you may know URLScan feature is deprecated from IIS7 and Within IIS 7, all the core features of URLScan have been incorporated into a module called Request Filtering, and a Hidden Segments feature has been added. Windows Azure instances for Web Role...

In Windows Azure we can consider two types of multicast communication: Application/Service level Multicast Messaging between multiple roles: Multicast Messaging between multiple roles which is Inter-Role communication between multiple role facilitated...

Following is the code which shows Windows Azure Blob size as “0” even when the same blob is accessible and could be downloaded without any problem: StorageCredentialsAccountAndKey creds = new StorageCredentialsAccountAndKey("AZURE_STORAGE_NAME...

The Million Song Dataset is a freely-available collection of audio features and metadata for a million contemporary popular music tracks. Its purposes are: To encourage research on algorithms that scale to commercial sizes To provide...

For each Mapper and Reducer you can get Task attempt id and Task ID both. This can be done when you set up your map using the Context object. You may also know that the when setting a Reducer an unique reduce ID is used inside reducer class setup method...

When submitting a Map/Reduce job in Hadoop cluster, you can provide number of map task for the jobs and the number of reducers are created depend on the Mappers input and the Hadoop cluster capacity. Or you can push the job and Map/Reduce framework will...

When you try to consume a content from Windows Azure blob storage you might see that sometime the content does not render correctly to browser or played correctly by the plugin used. After a few issues I worked on, I found this is mostly because the proper...

While working with Map/Reduce jobs in Hadoop, it is very much possible that you have got “sorted data” stored in HDFS. As you may know the “Sort function” exists not only after map process in map task but also with merge process...

Sometimes it is required to run multiple Map/Reduce jobs in same Hadoop cluster however opening several Hadoop command shell or (Hadoop terminal) could be trouble. Note that depend on your Hadoop cluster size and configuration, you can run limited amount...

Scaling is one super big advantage of having your application running in cloud. Every cloud vendor provides some sort of scaling infrastructure with respect to the cloud service they provide. Scaling services are mainly 2 types: Horizontal Scaling...

When you have jobs running in Hadoop, you can use the map/reduce web view to list the current running jobs however what if you would need to kill any current running job because the submitted jobs started malfunctioning or in worst case scenario, the...

When writing MapReduce programs you definitely going to hit problems in your programs such as infinite loops, crash in MapReduce, Incomplete jobs etc. Here are a few things which will help you to isolate these problems: Map/Reduce Logs Files: ...

When running MapReduce jobs it is possible to have several MapReduce steps with overall job scenarios means the last reduce output will be used as input for the next map job. Map1 -> Reduce1 -> Map2 -> Reduce2 -> Map3... While searching...

If you format only Namenode, it will remove the metadata stored by the Namenode, however all the temporary storage and Datanode blocks will still be there. To remove temporary storage and all the Datanode blocks you would need to delete the main Hadoop...

Once you have access enabled to Hadoop on Windows Azure you can run any mahout sample on head node. I am just trying to run original Apache Mahout ( http://mahout.apache.org/ ) sample which is derived from the clustering sample on Mahout's website ( https...

CDN picks up compression from the origin and Windows Azure Storage does not support compression directly so if you get CDN content from Azure Storage origin, it will not be compressed. So if you have content hosted at Windows Azure Storage you will not...

The Windows Azure Azure CDN, like any other CDNs, attempts to be a transparent caching layer. The CDN doesn’t care who the referring site might be. Like any other CDN, Windows Azure CDN keep things transparent and have no concern of what the referring...

Apache Hadoop Primary Namenode and secondary Namenode architecture is designed as below: Namenode Master: The conf/masters file defines the master nodes of any single or multimode cluster. On master, conf/masters that it looks like this: ———————...

Apache Hadoop is designed to have Master Slave architecture. Master: Namenode, JobTracker Slave: {DataNode, TaskTraker}, ….. {DataNode, TaskTraker} HDFS is one primary components of Hadoop cluster and HDFS is designed to have Master...

ignoreRoleInstanceStatus is described in WebRole and WorkerRole Schema as below http://msdn.microsoft.com/en-us/library/windowsazure/gg557553.aspx Web Role: ignoreRoleInstanceStatus boolean Optional. When the...

Windows Azure Blob storage API provided following upload scenarios to upload a blob: Scenario [1]: You can upload a single blob in N parallel threads In your code if you set CloudBlobClient.ParallelOperationThreadCount = N; then N parallel threads...