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Common coordination tasks | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/05/common-coordination-tasks
Learn Zookeeper with me! March 5, 2016. Most distributed applications need to perform some tasks which are common across applications. Some of these tasks are listed below:. This is one of the most important task in a distributed application/systems. What does service discovery mean? To allow serialized access to shared resource, the distributed system needs implement distributed mutex. 4 2 phase commit. In many distributed systems, you would want a server to act as a leader and perform leadership activi...
learnzookeeperwithme.wordpress.com
Setting up Zookeeper | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/05/installation
Learn Zookeeper with me! March 5, 2016. This post we will see how to setup zookeeper and test it out by running it. The following will be discussed:. Downloading & Installing Zookeeper. Running single server Zookeeper. Running multi server Zookeeper. Download the latest version of zookeeper (3.4.8 at the time of this post). Now untar the file. Zookeeper$ tar -xvf zookeeper-3.4.8.tar.g /zookeeper$ cd zookeeper-3.4.8 /zookeeper/zookeeper-3.4.8$ ls CHANGES.txt conf recipe...3 Running single server Zookeeper.
learnzookeeperwithme.wordpress.com
Locking using Zookeeper | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/05/locking-using-zookeeper
Learn Zookeeper with me! March 5, 2016. In the last post we discussed how Zookeeper can be used to achieve service discovery. In this post, we will see how Zookeeper can be used to perform distributed locking. Please find the pseudo code below to achieve distributed locking:. Create a persistent node called globallocknode. Create an ephemeral sequential lock- node under globallocknode. Something like (/globallocknode/lock-). Those clients can then again perform step 3 and continue from there. Curator ...
learnzookeeperwithme.wordpress.com
Zookeeper data model | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/05/zookeeper-data-model
Learn Zookeeper with me! March 5, 2016. The agenda of this post is to discuss the following:. 1 Zookeeper data model. As we already discussed in earlier posts that Zookeeper provides a hierarchal namespace to store data just like a unix file system. What you see above is how zookeeper stores data. Every node is called as znode. The figure above represent a znode tree. A node can have children. Each node is associted with a name, path and data. Data can be blank. 2 Zookeeper supported operations. On the o...
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Distributed Applications overview | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/02/distributed-applications
Learn Zookeeper with me! March 2, 2016. The agenda of this post to discuss the following:. What is a distributed application? Why do we need distributed applications? Characteristics of distributed applications. Challenges in building a distributed application. 1 What is a distributed application/system? There are many definitions of distributed application. They all mean exactly the same thing. Some of the definitions are as listed below:. 2 Why do we need distributed applications? They will be distribu...
learnzookeeperwithme.wordpress.com
Watches and updates | Learn Zookeeper with me!
https://learnzookeeperwithme.wordpress.com/2016/03/05/watches-and-updates
Learn Zookeeper with me! March 5, 2016. Zookeeper is a service and accessing a znode means making a remote call to the zookeeper service. In order to determine the value of a znode in znode tree, a client can make a call to the zookeeper service. However, if lets say the value hasn’t changed since the last time the call was made. It thus costed client time for the unnecessary call. In the next post we will see how to set up and configure Zookeeper. Reference – Flavio Junqueria and Benjamin Reed....
learnzookeeperwithme.wordpress.com
Learn Zookeeper with me! | Page 2
https://learnzookeeperwithme.wordpress.com/page/2
Learn Zookeeper with me! Most distributed applications need to perform some tasks which are common across applications. Some of these tasks are listed below:. This is one of the most important task in a distributed application/systems. What does service discovery mean? To allow serialized access to shared resource, the distributed system needs implement distributed mutex. 4 2 phase commit. In many distributed systems, you would want a server to act as a leader and perform leadership activities like distr...
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Hadoop ≅ HDFS + MapReduce (Part – II) | Abode for Hadoop Beginners
https://learnhadoopwithme.wordpress.com/2013/08/13/hadoop-≅-hdfs-mapreduce-part-ii
Abode for Hadoop Beginners. Hadoop HDFS MapReduce (Part II). August 13, 2013. In this post, we will discuss the following with regards to MapReduce framework :-. Motivation for a parallel processing framework. How MapReduce solves a problem? Shuffle and Sort Phase. Motivation for a parallel processing framework. Is one such programming model designed for processing large volumes of data in parallel by dividing the work into a set of independent tasks. Each of these tasks are then run on individual node i...
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Unit Test MapReduce using MRUnit | Abode for Hadoop Beginners
https://learnhadoopwithme.wordpress.com/2013/09/03/unit-test-mapreduce-using-mrunit
Abode for Hadoop Beginners. Unit Test MapReduce using MRUnit. September 3, 2013. In order to make sure that your code is correct, you need to Unit test your code first. And like you unit test your Java code using JUnit testing framework, the same can be done using MRUnit to test MapReduce Jobs. I will now discuss the template that can be used for writing any unit test for MapReduce job. To Unit test MapReduce jobs:. Create a new test class to the existing project. Add the mrunit jar file to build path.
