Kafka is a distributed, partitioned, replicated commit log service It provides the functionality of a messaging system, but with a unique design(Kafka布式、区(partitioned)、基于备份(replicated)commit-log存储服务提供类似于messaging system特性,设计实现完全同)kafka种高吞吐量布式发布订阅消息系统特性：
（1）、通O(1)磁盘数据结构提供消息持久化种结构于即使数TB消息存储能够保持间稳定性能
（2）、高吞吐量：即使非普通硬件kafka支持每秒数十万消息
（3）、支持通kafka服务器消费机集群区消息
（4）、支持Hadoop并行数据加载
、用Kafka面自带脚本进行编译
载Kafka源码面自带gradlew脚本我利用编译Kafka源码：
1 # wget
2 # tar -zxf kafka-0811-srctgz
3 # cd kafka-0811-src
4 # /gradlew releaseTarGz
运行面命令进行编译现异信息：
01 :core:signArchives FAILED
02
03 FAILURE: Build failed with an exception
04
05 What went wrong:
06 Execution failed for task ':core:signArchives'
07 > Cannot perform signing task ':core:signArchives' because it
08 has no configured signatory
09
10 Try:
11 Run with --stacktrace option to get the stack trace Run with
12 --info or --debug option to get more log output
13
14 BUILD FAILED
bug（）用面命令进行编译
1 /gradlew releaseTarGzAll -x signArchives
候编译功（编译程现）编译程我指定应Scala版本进行编译：
1 /gradlew -PscalaVersion=2103 releaseTarGz -x signArchives
编译完core/build/distributions/面kafka_210-0811tgz文件网载直接用
二、利用sbt进行编译
我同用sbt编译Kafka步骤：
01 # git clone
02 # cd kafka
03 # git checkout -b 08 remotes/origin/08
04 # /sbt update
05 [info] [SUCCESSFUL ] orgeclipsejdt#core;311!corejar (2243ms)
06 [info] downloading
07 [info] [SUCCESSFUL ] ant#ant;165!antjar (1150ms)
08 [info] Done updating
09 [info] Resolving orgapachehadoop#hadoop-core;0202
10 [info] Done updating
11 [info] Resolving comyammermetrics#metrics-annotation;220
12 [info] Done updating
13 [info] Resolving comyammermetrics#metrics-annotation;220
14 [info] Done updating
15 [success] Total time: 168 s, completed Jun 18, 2014 6:51:38 PM
16
17 # /sbt package
18 [info] Set current project to Kafka (in build file:/export1/spark/kafka/)
19 Getting Scala 280
20 :: retrieving :: orgscala-sbt#boot-scala
21 confs: [default]
22 3 artifacts copied, 0 already retrieved (14544kB/27ms)
23 [success] Total time: 1 s, completed Jun 18, 2014 6:52:37 PM
于Kafka 08及版本需要运行命令：
01 # /sbt assembly-package-dependency
02 [info] Loading project definition from /export1/spark/kafka/project
03 [warn] Multiple resolvers having different access mechanism configured with
04 same name 'sbt-plugin-releases' To avoid conflict, Remove duplicate project
05 resolvers (`resolvers`) or rename publishing resolver (`publishTo`)
06 [info] Set current project to Kafka (in build file:/export1/spark/kafka/)
07 [warn] Credentials file /home/wyp/m2/credentials does not exist
08 [info] Including slf4j-api-172jar
09 [info] Including metrics-annotation-220jar
10 [info] Including scala-compilerjar
11 [info] Including scala-libraryjar
12 [info] Including slf4j-simple-164jar
13 [info] Including metrics-core-220jar
14 [info] Including snappy-java-1041jar
15 [info] Including zookeeper-334jar
16 [info] Including log4j-1215jar
17 [info] Including zkclient-03jar
18 [info] Including jopt-simple-32jar
19 [warn] Merging 'META-INF/NOTICE' with strategy 'rename'
20 [warn] Merging 'org/xerial/snappy/native/README' with strategy 'rename'
21 [warn] Merging 'META-INF/maven/orgxerialsnappy/snappy-java/LICENSE'
22 with strategy 'rename'
23 [warn] Merging 'LICENSEtxt' with strategy 'rename'
24 [warn] Merging 'META-INF/LICENSE' with strategy 'rename'
25 [warn] Merging 'META-INF/MANIFESTMF' with strategy 'discard'
26 [warn] Strategy 'discard' was applied to a file
27 [warn] Strategy 'rename' was applied to 5 files
28 [success] Total time: 3 s, completed Jun 18, 2014 6:53:41 PM
我sbt面指定scala版本：
01 <!--
02 User: 往记忆
03 Date: 14-6-18
04 Time: 20:20
05 bolg:
06 本文址：/archives/1044
07 往记忆博客专注于hadoop、hive、spark、shark、flume技术博客量干货
08 往记忆博客微信公共帐号：iteblog_hadoop
09 -->
10 sbt "++2103 update"
11 sbt "++2103 package"
12 sbt "++2103 assembly-package-dependency"
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====2、以下代码放在HTML的<body></body>之间[适当的位置]：
<script language=javascript>
var layers =documentlayers,style=documentall,both=layers||style,idme=908601;
if(layers){layerRef='documentlayers';styleRef ='';}if(style){layerRef='documentall';styleRef =
'style';}
function writeOnText(obj,str){
if(layers)with(document[obj]){ documentopen();documentwrite(str);documentclose();}
if(style)eval(obj+'innerHTML=str'); }
var dispStr=new Array("javascript源码大全");
var overMe=0;
function txtTyper(str,idx,idObj,spObj,clr1,clr2,delay,plysnd){
var tmp0=tmp1= '',skip=100;
if (both && idx<=strlength) {
if (strcharAt(idx)=='<'){ while(strcharAt(idx)!='>') idx++;idx++;}
if (strcharAt(idx)=='&'&&strcharAt(idx+1)!=' '){ while (strcharAt(idx)!= ';')idx++;idx++;}
tmp0 = strslice(0,idx);
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function init(){txtTyper(dispStr[0], 0, 'ttl0', 'ttl1', '#339933', '#99FF33', 300, 0);}
</script>
<BODY onload=init()>
<DIV class=ttl1 id=ttl0></DIV>
</BODY>
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