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[Hadoop] confusing version

Because Hadoop is still in its early stage of rapid development, and it is open-source, its version has been very messy. Some of the main features of Hadoop include:Append: Supports file appending. If you want to use HBase, you need this feature. RAID: to ensure data reliability, you can introduce verification codes to reduce the number of data blocks. Link: https://issues.apache.org/jira/browse/HDFS/component/12313080 Symlink: supports HDFS file link

[Hadoop] how to select the correct Hadoop version for your Enterprise

Because Hadoop is still in its early stage of rapid development, and it is open-source, its version has been very messy. Some of the main features of Hadoop include: Append: Supports file appending. If you want to use HBase, you need this feature. RAID: to ensure data reliability, you can introduce verification codes to reduce the number of data blocks. Link: https://issues.apache.org/jira/browse/HDFS/component/12313080 Symlink: supports HDFS fil

Hadoop version comparison [go]

Hadoop distinguishes between versions with significant features, and concludes that the features used to differentiate Hadoop versions are as follows:(1) Append support file append function, if you want to use HBase, this feature is required.(2) RAID on the premise of ensuring that the data is reliable, by introducing a check code less data block number. Detailed Links:https://issues.apache.org/jira/browse/HDFS/component/12313080(3) Symlink supports

Resource management framework in Hadoop 2.0-YARN (yet another Resource negotiator)

dynamically. This is already in the perfect, concrete can refer to:https://issues.apache.org/jira/browse/YARN-291(2) The CPU is set by the introduction of the "Virtual CPU", while the concept of virtual CPU is vague and ambiguous, and the community is trying to use the ECU concept in Amazon EC2 to regularize it, for specific reference:https://issues.apache.org/jira/browse/YARN-1024https://issues.apache.org

Dockone Technology Share (39): Continuous integration workflow based on Docker and Git

look at our infrastructure and our role: Development Engineer Test Engineer Products Other Then we'll divide the boundaries of each role: Development engineers should only focus on GIt code and JIRA bugs and new feature. The test engineer only focuses on JIRA bugs and new feature tests. Products and others are concerned only with JIR

<转> How to manage open source software community: Open Source project Management method </转>

This post was last edited by Jimila on 2012-10-5 12:55 Transferred from: http://www.12306ng.org/thread-911-1-1.html Original: http://www.ltesting.net/ceshi/open/kyrjcsxw/2012/0713/205272.html How did the open source community form? How does open source project manage? In this article, I'd like to share some of the management tools and collaborative processes I've used in the AS7 development process, as well as some understanding of the open source community. The AS7 development process involves

Web site Log Analysis research and analysis of the site's SEO problems

From doing SEO start the boss has been to instill in me: "To do scientific SEO, regardless of whether the flow is up or down to know the source, and to understand these at the same time to determine the direction of Web site traffic must rely on the log analysis, rather than by the sense of what factors use traffic changes. So from the beginning from the data, for the site data real monitoring, from the data to judge the site's problems, and then make corresponding changes. This is one of the re

Building an efficient Team collaboration tool (iii) Confluence installation configuration

/opt/tomcat6 Tomcat installation directory /opt/atlassian Atlassian the parent directory of the product installation /opt/atlassian/home Atlassian Product Home directory, Confluence_home is in/opt/atlassian/home/confluence /opt/atlassian/confluence Jira installation directory 3. Establishment of the Confluence database Log in to MySQL with root user to create schema required f

Hdu3468 maximum stream/binary matching + BFS

Treasure hunting Time Limit: 4000/2000 MS (Java/others) memory limit: 131072/65536 K (Java/Others)Total submission (s): 903 accepted submission (s): 228Problem descriptiondo you like treasure hunting? Today, with one of his friend, ISEA is on a venture trip again. As most movie said, they find so many gold hiding in their trip.Now ISEA's clever friend has already got the map of the place they are going to hunt, simplify the map, there are three ground types: ● '.' Means blank ground, they can ge

Four stages of the stock market movement, 13 major trading methods of the 30th moving average

no longer find in the 30th moving average to the top of the dealer strategic long stock, at this time only to consider with a small amount of money fast-forward short-term participation in the first rally of the leader shares, only decisively grab rebound.★ Stock Movement Four stages of market significance:A, the market significance of the Underpan stage:After a long period of decline in a stock, the short market energy is basically released, the sto

Opening eight methods of illustration

⑷, small In 0.7 straight down, sell (Fig. 4)5, 10:30 times times the law of the decline in the trend, early to 10:30 of the volume if there is no last trading day end of the final hour volume One times, the height of the rally usually not over 11 points, there will be no big changes in the wind and cloud. (Fig. 5)6, reduce the amount of anti-arc law early high or low open does not fill the gap, in the first hour after the

Process of handling bugs

Also belongs to a popular article, I hope that they are attracted by various technologies at the same time, can often come to collate and summarize the most basic software testing knowledge.From the first defect management tool that came in contact with the new work, to Redmine, JIRA, Bugzilla, to the current QC, and of course other kinds of open source or commercial defect management tools, the essence of them is to manage the life cycle of defects.I

Cassandra is coming to Version 1.0.

Some time ago, cassandra0.7 was officially released. Next, cassandra1.0 will be released soon. The content of the email list is as follows: Way back in Nov 09, we did a users survey and asked what featuresPeople wanted to see. Here was my summary of the responses:Http://www.mail-archive.com/Cassandra-user @ incubator.Apache.org/ms00001446.html Looking at that, we 've done essential all of them. I think we canMake a strong case that our next release shoshould be 1.0; it'sProduction ready, i

Hadoop 0.20.2 Problems

The master asked me to check hadoop and use the latest version. As a result, many problems were encountered and solved one by one ~ Run the pseudo distribution mode in Linux, and there is always nullpointerexception. Java. Lang. nullpointerexceptionAt java. util. Concurrent. concurrenthashmap. Get (concurrenthashmap. Java: 768)At org. Apache. hadoop. mapred. reducetask $ reducecopier $ getmapeventsthread. getmapcompletionevents (reducetask. Java: 2747)At org. Apache. hadoop. mapred. reducetask

About Python Fault management semi-automation experience [one]

recently, from the yard to the bitter forceFCThe so-called FC is fault coordinator abbreviation, is responsible for coordinating the handling of fault related roles.FC is responsible for a particularly large number of chores, many of which are completely repetitive mechanized labor. In doingFCOne of the responsibilities is to add a different branch of the change table to the developer for each Fault, so that all the branches affected by the Fault have related changes.In the company's Turtle Spee

The level that the project manager, System Architect, or technical backbone should possess (3)

://subclipse.tigris.org/Currently, SVN plug-ins support development tools such as Eclipse, jdeveloper, and netbeans. 2. Knowledge Base Management Tools Each person in the team will find some problems during development. In the end, some problems may not be solved, and some problems can be solved. Generally, most problems can be solved through the joint efforts of team members. knowledge should be formed in the solution and steps to solve the problems. As a leader of a team, we must pay attentio

Mysql database authorization (authorize a user to a database)

Revoke first sets this user to only have the showdatabase permission grantselect, insert, update, deleteonredmine1. * tojira @ % identifiedbyjira. the syntax of the GRANT command is as follows: GRANTprivileges (columns) ONwhat The http://www.cnblogs.com/jifeng/archive/2011/03/06/1972183.html first sets this user to only grant the show database permission GRANT select, insert, update, delete on redmine1. * to jira @ % identified by

Idea Advanced usage

First, quickly open the Action:ctrl+shift+a All action is listed in the list, corresponding to the various actions of idea, for example: Enter Backgroud to set the background for the editor Enter Restclient to open restclient override postman to perform HTTP request operation Enter SSH to open an SSH session Action is a lot of things, you can slowly explore ... Second, configure the project Management Server such as adding JIRA servers: Ctrl+alt+s Op

On Kylin1.6 streaming Kafka cube build in the process of success encountered in the pit

, always error, so I confused the N-long! Kylin1.5: $ kylin_home/bin/streaming_build.sh streaming_cube 300000 0 Pit 2: Official documents can only be used for reference, not as a canon! Too serious, you lose! (Cost 1 days)As below, I copy the command from the official website to use the name of the Startsourceoffset and Endsourceoffset, the operation of the process is directly error. Carefully compare the name in the command with the name of the error prompt in the CLI sourceoffsetstart

"Go" Java hot deployment, that is to see the change

state, namely, the enhancement of hot swap. After using DCE, you can add and remove properties of classes and methods to change the parent class of a class Such a strengthening, fully meet the normal development needs. DCE is based on the GPL v2.0 open source protocol. You can download DCE source code or executable files through the Windows,linux,mac OS. The following records the problems encountered in DCE and the resolution of DCE mentioned on the Internet. DCE Note Under Linux, DCE currently

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