thrift

一、sqoop1.4.6 to hbase1.2 in hue4.1 CM安装 cdh 5.15.x, 因想用简单的sqoop1所以parce装的sqoop1 client,经测试报：SQOOP_CONF_DIR找不到，mysql drive no find ,检查发现安装目录和classpath都有，依然如此，后找文档说是cdh只支持sqoop2，sqoop1需要手配置 oozie/libext并上传到hdfs下，链接https://www.cloudera.com/documentation/enterprise/latest/topics/cdh_oozie_sqoop_jdbc.html，翻译如下 ： 在Oozie中使用Sqoop动作 Sqoop 1不附带第三方JDBC驱动程序。您必须单独下载它们并将它们保存到在/ var / lib中/ sqoop /Oozie服务器上的目录。有关更多信息，请参阅 使用命令行设置Apache Sqoop 。 建议 Cloudera建议您不要将Sqoop CLI命令与Oozie Shell Action一起使用。此类部署不可靠，并且在升级和配置更改期间容易中断。 要将数据导入Hive，请使用Sqoop Action和Hive2 Action的组合。 SQoop Action简单地将数据摄入HDFS。 Hive2

At the Cassandra Summit, it was mentioned that Thrift and CQL 3 have subtle differences in their definitions of columns and rows. The Google hasn't helped me understand this difference. The only information I can find is that the metadata is different, and as such, I shouldn't mix thrift and CQL. What is the subtle difference (I've read a bit about metadata representations...)? in what way does it break the compatibility? Why is the change better? I'm happy to read any docs that will help me, I've just been unable to find anything specifically related to this topic. Here's the reading path I

FrameBuffer为AbstractNonblockingServer类的内部类，TThreadedSelectorServer继承了AbstractNonblockingServer： 通过研究代码，发现FrameBuffer的read方法的代码中有如下片段， // pull out the frame size as an integer. int frameSize = buffer_.getInt(0); if (frameSize <= 0) { LOGGER.error("Read an invalid frame size of " + frameSize + ". Are you using TFramedTransport on the client side?"); return false; } // if this frame will always be too large for this server, log the // error and close the connection. if (frameSize > MAX_READ_BUFFER_BYTES) { LOGGER.error("Read a frame size of " + frameSize + ", which is bigger than the maximum

Trying to install thift gem after OSX El Capitan upgrade: $ gem install thrift Building native extensions. This could take a while... ERROR: Error installing thrift: ERROR: Failed to build gem native extension. /Users/foo/.rvm/rubies/ruby-2.1.4/bin/ruby -r ./siteconf20160402-32256-7dzqel.rb extconf.rb checking for strlcpy() in string.h... yes creating Makefile make "DESTDIR=" clean make "DESTDIR=" compiling binary_protocol_accelerated.c compiling bytes.c compiling compact_protocol.c compact_protocol.c:442:41: error: shifting a negative signed value is undefined [-Werror,-Wshift-negative-value]

Is there any way to serialize a dictionary using protocol buffers, or I'll have to use Thrift if I need that? People typically write down the dictionary as a list of key-value pairs, and then rebuild the dictionary on the other end. message Pair { optional string key = 1; optional string value = 2; } message Dictionary { repeated Pair pairs = 1; } For future answer seekers, ProtoBuf now supports Maps natively: message MapMessage { map<string, string> MyMap = 1; } You can check the ProtoText package. Assume you want to serialize a dict person_dict to a pre-defined PersonBuf protobuf object

1 、 Thrift 概念 Thrift 是一个软件框架，用来进行可扩展且跨语言的服务的开发。它结合了功能强大的软件堆栈和代码生成引擎，以构建在 C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, JavaScript, Node.js, Smalltalk, and OCaml 这些编程语言间无缝结合的、高效的服务。 thrift 最初由 facebook 开发， 07 年四月开放源码， 08 年 5 月进入 apache 孵化器。 Thrift 允许你定义一个简单的定义文件中的数据类型和服务接口。以作为输入文件， 编译器 生成代码用来方便地生成RPC 客户端 和服务器通信的无缝跨编程语言。 看到这里，感觉thrift的作用与webservice差不多，webservice使用xml文件传输，文件太大，效率不高，thrift使用二进制数据，效率更高！ 2 、 Thrift Installing and Compiling 安装与编译 操作系统：Ubuntu 8.0+ Thrift 安装包： thrift-0.7.0.tar.gz 下载地址：http://labs.renren.com/apache-mirror//thrift/0.7.0/thrift-0.7.0.tar.gz 具体安装过程： ①

This question already has an answer here: Biggest differences of Thrift vs Protocol Buffers? 14 answers I've been using PB for quite a while now, but, Thrift has constantly been at the back of my mind. The primary advantages of thrift, as I see it are: Native collections (i.e, vector, set etc) vs PBs repeated providing functionality similar to, but not quite like (no iterators unless you dig into RepeatedField which the documentation states "shouldn't be required in most cases"). A decent RPC implementation provided, instead of just hooks to plug your own in. More officially supported

We're looking into transport/protocol solutions and were about to do various performance tests, so I thought I'd check with the community if they've already done this: Has anyone done server performance tests for simple echo services as well as serialization/deserialization for various messages sizes comparing EJB3, Thrift, and Protocol Buffers on Linux? Primarily languages will be Java, C/C++, Python, and PHP. Update: I'm still very interested in this, if anyone has done any further benchmarks please let me know. Also, very interesting benchmark showing compressed JSON performing similar /

All of these provide binary serialization, RPC frameworks and IDL. I'm interested in key differences between them and characteristics (performance, ease of use, programming languages support). If you know any other similar technologies, please mention it in an answer. JUST MY correct OPINION ASN.1 is an ISO/ISE standard. It has a very readable source language and a variety of back-ends, both binary and human-readable. Being an international standard (and an old one at that!) the source language is a bit kitchen-sinkish (in about the same way that the Atlantic Ocean is a bit wet) but it is

Thrift是一个rpc框架，也是一个不错的序列化框架，支持多种语言，此处我使用的是Java。 1、当然开始之前需要下载thrift到本地，我这里下载的是最新的0.12.0版本，并设置好环境变量 2、编写IDL ##命令空间 namespace java com.dxy.learn_netty.thrift ##为了书写习惯，将thrift的类型映射到java中的类型 typedef i16 short typedef i32 int typedef i64 long typedef bool boolean ##编写一个结构体，用于构造数据，进行传输 struct Person{ 1:optional string name, 2:optional int age, 3:optional boolean married } ##定义服务接口，两个方法 service PersonService{ Person getPersonByName (1:required string name), void savePerson(1:required Person person) } 3、用thrift编译上面编写的IDL文件，命令非常简单，language是语言，这里当然是java了，Thrift filename是IDL文件名xxx.thrift thrift --gen