What is the design of Snapshots in HDFS? This PDF documents the design of snapshot. Jing Zhao and Tsz-Wo Sze from Hortonworks gave a great talk on the design of HDFS snapshots. The slides can be downloaded at here. The development of snapshot is tracked by HDFS-2802.
Tag: Development
How to package a Scala project to a .jar with sbt?
Posted onHow to package a Scala project to a .jar file with sbt? Manually packaging the .class files are fine but too tedious. A jar of just the project classes The command: sbt package will produces the main artifact as a jar into target/scala-2.x.y/project_name_2.x.y-zz.jar. Continuously building the package: sbt ~package Standalone jar with all dependencies If
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How to Import a CMake project into Eclipse CDT?
Posted onHow to Import a CMake project into Eclipse CDT? For example, the current CMake project source directory is ./src. mkdir ./cdt && cd ./cdt && cmake -G “Eclipse CDT4 – Unix Makefiles” ../src cmake will generate a Eclipse project in ./cdt and you can open it in Eclipse.
How to detect memory leaks of C programs in Linux?
Posted onHow to detect memory leaks of C programs in Linux? I also have access to the source code of the program. There are many posts related to this: Easy and quick tools on Linux (while not very accurate): http://blog.thewebsitepeople.org/2011/03/linux-memory-leak-detection/ Valgrind: manual and a tutorial. gperftools has the Google Heap Profiler which can checks for memory
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How to install drivers for TL-WN725N v2 USB wireless adapter on Fedora 19
Posted onI had a TP-Link TL-WN725N v2 USB wireless adapter. But it seems the kernels in Fedora 19 have not yet included drivers for it. How to install drivers for TL-WN725N v2 on Fedora 19? The driver is under development. You can find the source here and in the drivers/staging in the Linux kernel. If you
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Shared hosting services with SSH enabled
Posted onWhich shared hosting services have SSH enabled? SSH is a great tool for management and development. Lots shared hosting services support SSH. Here is a non-complete list: Dreamhost SSH on dreamhost: http://wiki.dreamhost.com/Enabling_Shell_Access BlueHost SSH on BlueHost: http://my.bluehost.com/cgi/help/180 GoDaddy SSH on GoDaddy: http://support.godaddy.com/help/article/4942 HostGator SSH on HostGator: http://support.hostgator.com/articles/hosting-guide/lets-get-started/how-do-i-get-and-use-ssh-access HostMonster SSH on HostMonster: http://my.hostmonster.com/cgi/help/180 ServerGrove SSH on
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SQL layers on NoSQL databases
Posted onWhat are the SQL layer solution over NoSQL databases such as key/value stores? Phoenix: A SQL layer on HBase: https://github.com/forcedotcom/phoenix They also show some performance results: https://github.com/forcedotcom/phoenix/wiki/Performance F1 – The Fault-Tolerant Distributed RDBMS Supporting Google’s Ad Business: http://research.google.com/pubs/pub38125.html With F1, we have built a novel hybrid system that combines the scalability, fault tolerance, transparent sharding,
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How to Implement Hibernate Envers in an Application
Posted onTechnology Hibernate Envers is the frameworks for auditing entities. As the name suggests Hibernate Envers is developed on top of Hibernate, it will on Hibernate and Hibernate implemented JPA. Hibernate Envers provides easy auditing, versioning solution for entity classes. Advantages of Hibernate Envers: Auditing of all mappings defined by JPA specification. Auditing Hibernate specific mappings
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USB Standards and Supports in Linux
Posted onThe USB standards have evolved to 3.1 and the supported throughput have been increased too. On Linux, the support to USB standards are following the standards development. In this post, we will survey the standards that common hardware support and the support in Linux. USB standards USB 2.0: https://en.wikipedia.org/wiki/USB#USB_2.0 Speed: <= 60MB/s, or 480 Mbps
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Are You Wanting to Learn a Programming Language? Read Before Your Make a Choice
Posted onMaking a career choice is difficult. And, if you have decided on becoming a programmer, the difficulty is just beginning. The most important thing is to first decide the language that you want to learn and this is often the most difficult decision. The good part is that you know you need to focus on
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Spring Shell Technology For Java development
Posted onThis post is about the Spring Shell technology and its use in java. Experts of java development India have shared their best knowledge in this post for Spring Shell with the community people. If you have anything to ask, do it at the end. Technology: It is command line tool for Java applications to interact
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Dynamics CRM Consultants Explain How To Filter Sub Branch Lookup Field Value in CRM
Posted onIn this blog Dynamics CRM consultants are sharing a step-by-step guide to explain how to filter another lookup field value based on one Lookup field value. In this Lead entity, they are having two fields Branch and Sub Branch and you will learn how they filter Subbranch based on Branch field. Based on one Lookup
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How to convert Managed Solution into Unmanaged for On-Premise CRM organisation?
Posted onSolution is very important part of Dynamics CRM. In order to deploy your customization, solution is the only bridge which help you to achieve your goal. There are two types of solutions available in CRM: Managed and Unmanaged. Managed Solutions: This is the solutions that you can import and publish only. You neither export it nor you can
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Push and Pull data from Restful Service in Asp.net MVC Application using Angular JS
Posted onIn this post, asp.net development India based professionals will explain the best way to manage the Restful service using AngularJS. They are explaining the push and pull functionality available in Rest service in simple steps. Read the article to know more. In this Post I am going explain how we can manage the Restful service
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How to Install Wine 32-bit on CentOS 7
Posted onSince version 7, RHEL has only x86-64 versions. The same thing happens to CentOS 7. In CentOS 7/EPEL, there is only package for Wine x86-64. However, many Windows .exe files are 32-bit. Even there are 64-bit versions for some software, their installation file is 32-bit. And for some certain software such as Office 2007, 32-bit
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Parameterised AngularJS Routing in Asp.net MVC using $routeProvider
Posted onIn this post, asp.net development India based professionals will brief you about the interesting feature of AngularJS, that I Routing. You will learn the method to split the single page into multiple views. For more info, read the article. In this article we are going to see one of the most useful feature of AngularJS
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Quartz Implementation in Java
Posted onIn this post, java development India based experts will explain the concept of Quartz. You will also learn the method of setting up the Quartz in this article. You can ask experts if anything bothers you. Technology Quartz is the open source Java technology for scheduling background jobs. If we want to execute the task
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Notes for Beginners of Software Development on Linux
Posted onLinux is a great platform for software development targeting servers or backends. In general, working on Linux is very productive. The problem that beginners on Linux face is the the learning curve is steep at the beginning. But believe me, after you get through the initial green steep learning step as in the figure below
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Git Merging FAQs
Posted ongit merge is frequently used during development of projects managed by git. There are many common questions about git merge and I find most are solved and discussed on StackOverflow. Here, I summarize useful ones so that others who want to learn git merge need to do the search again. Merge, rebase, fast forward and
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Useful Git Submodule Commands
Posted ongit submodule is a very useful tools in git to include other git repositories in one repository to handle cases such as library dependencies. In this post, I summarize some commonly used commands that I find useful for working with git submodule. For the list of full commands, check the git submodule manual. Add a
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