Hadoop是使用Java语言开发的,但是有一些需求和操作并不适合使用java,所以就引入了本地库(Native Libraries)的概念,通过本地库,Hadoop可以更加高效地执行某一些操作. 目前在Hadoop中,本地库应用在文件的压缩上面: zlib    gzip 在使用这两种压缩方式的时候,Hadoop默认会从$HADOOP_HOME/lib/native/Linux-*目录中加载本地库. 如果加载成功,输出为: DEBUG util.NativeCodeLoader - Tryin…
和Hadoop交互的四种方法: 1. Native Libraries 2. Hive 3. Pig 4. Cascading At a high level, people use the native Hadoop libraries to achieve the greatest performance and have the most fine-grained control. Pig is somewhere between the very SQL-like, database l…
Apache Hadoop的三种运行环境介绍及standAlone环境搭建 三种运行环境 standAlone环境 单机版的hadoop运行环境 伪分布式环境 主节点都在一台机器上,从节点分开到其他机器上(可以借助三台机器来实现) 完全分布式环境 主节点全部分散到不同机器上(NameNode Active,NameNode StandBy,ResourceManager 主节点,ResourceManager 备份节点) standAlone环境搭建 第一步:下载apache hadoop并上传…
概览 这个新手教程描写叙述了native(本地?原生?)hadoop库,包括了一小部分关于native hadoop共享库的讨论. This guide describes the native hadoop library and includes a small discussion about native shared libraries. 注意: 依据你的环境,词组 "native libraries" 可能会变成 *.so,这样你就须要编译.然后,要是词组 "na…
JNI Tips In this document JavaVM and JNIEnv Threads jclass, jmethodID, and jfieldID Local and Global References UTF-8 and UTF-16 Strings Primitive Arrays Region Calls Exceptions Extended Checking Native Libraries 64-bit Considerations Unsupported Fea…
myeclispe 中SVN插件常遇到的异常: Subclipse talks to Subversion via a Java API that requires access to native libraries.Those libraries where either not found or an incompatible version was loaded. Theerrors are displayed below. Information on getting a proper…
转自:http://bbs.umeng.com/thread-6552-1-2.html 报错信息:The library `SocialSDK_QQZone_2.jar` contains native libraries that will not run on the device. 解决方案: 此问题和Eclipse环境有关,按照如下步骤操作即可Eclipse->windows->Perferences (不一定这个,自己对着图找), 取消 Force error when exter…
Hadoop基础-MapReduce的常用文件格式介绍 作者:尹正杰 版权声明:原创作品,谢绝转载!否则将追究法律责任. 一.MR文件格式-SequenceFile 1>.生成SequenceFile文件(SequenceFileOutputFormat) The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across cl…
[2013-08-29 16:56:58 - jarsotest] The library 'wnp.jar' contains native libraries that will not run on the device. [2013-08-29 16:56:58 - jarsotest] The following libraries were found: [2013-08-29 16:56:58 - jarsotest]  - bin/classes/jni/wnptest/wnpj…
log信息: 03-27 09:08:25.887   397   400 W linker  : /data/app/com.guagua.qiqi-1/lib/arm/libMedia.so has text relocations. This is wasting memory and prevents security hardening. Please fix.03-27 09:08:26.807   397   400 W linker  : /data/app/com.guagua…