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小黑的博客,大数据研发和云计算技术,cdh53配置kerberos ldap sentry记录,阅读次数,阅读全文 »,hbase集群管理,hbase性能优化指南,hbase高级用法,hadoop集群管理,hbase概览,hbase构架,构建hadoop集群,kmeans算法检测网络异常入侵,mapreduce高级特性,mapreduce类型与格式,mapreduce工作机制,决策树算法预测森林植被,hadoop i/o,hadoop核心组件之yarn,hadoop核心组件之hdfs,hellip;
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1

MapReduce高级特性 | 小黑的博客

http://www.xiaohei.info/2016/05/09/mapreduce-features

Context.getCounter(Temperature.MISSING).increment( 1. Context.getCounter(Temperature.MALFORMAT).increment( 1. String jobId = args[ 0. Cluster cluster = new. Job job = cluster.getJob(JobId.forName(jobId) ;. System.err.println( "No job whih ID %s found". System.err.println( "Job %s is not complete". Counters counters = job.getCounters();. Missing = conters.findCounter(Temperature.MISSING).getValue();. Total = counters.findCounter(TaskCounter.MAP INPUT RECORDS).getValue();. URI uri = new. 主题 - NexT.Mist.

2

KMeans算法检测网络异常入侵 | 小黑的博客

http://www.xiaohei.info/2016/05/09/spark-kmeans-network

如果可以,那么使用监督学习技术可以轻易的将网站的每个访问划分为 正常 或者 异常. RawData = sc.textFile( "/spark data/ch05/kddcup.data". CatStatsData = rawData.map( .split( ",". CountByValue().toSeq.sortBy( . 2). Guess passwd.,53). Buffer overflow.,30). Ftp write.,8). LabelsAndData = rawData.map { line =. Buffer = line.split( ",". Label = buffer.remove(buffer.length - 1. Dense(buffer.map( .toDouble).toArray). Model = kmeans.run(data). 47979395571029514,1622.078830816566,868.5341828266062,4.453261001578883E-5,0.00643293793773531...0 imap. 12.

3

CDH5.3配置Kerberos+LDAP+Sentry记录 | 小黑的博客

http://www.xiaohei.info/2016/09/01/cdh-install-kerberos-ldap-sentry

Kerberos版本 1.10.3. LDAP版本 2.4.40. 通过YUM安装的CDH方式可以参考 http:/ blog.javachen.com/2014/11/04/config-kerberos-in-cdh-hdfs.html. Yum install krb5-server -y. Toolsh -r yum install krb5-devel krb5-workstation -y. 能够不直接访问 KDC 控制台而从 Kerberos 数据库添加和删除主体,需要添加配置. Default = FILE:/var/log/krb5libs.log. Kdc = FILE:/var/log/krb5kdc.log. Admin server = FILE:/var/log/kadmind.log. Default realm = XIAOHEI.INFO. Dns lookup kdc = false. Dns lookup realm = false. Ticket lifetime = 24h. Renew lifetime = 7d. 通常,将时钟扭斜设置为 300 秒 5 分钟。

4

决策树算法预测森林植被 | 小黑的博客

http://www.xiaohei.info/2016/05/06/spark-decisiontree-predict

20,200,3,中午,60. 20,200,3,中午,60,2000. 20,200,3,2,60,2000. Spark 十一 Mllib API编程 线性回归、KMeans、协同过滤演示. RawData = sc.textFile( "/spark data/covtype.data". Data = rawData.map { line =. Values = line.split( ",". 返回最后一个目标特征,由于决策树的目标特征规定从0开始,而数据是从1开始的,所以要-1. Label = values.last - 1. TrainData, cvData, testData) = data.randomSplit( Array. PredictionsAndLables = data.map { d =. Modelpredict(d.features), d.label). Metrics = getMetrics(model, cvData). 144110 6564.0 17.0 1.0 0.0 0.0 317.0. Impurity, depth, bins).

5

MapReduce类型与格式 | 小黑的博客

http://www.xiaohei.info/2016/05/08/mapreduce-type-format

RecordReader K,V createRecordReader. InputSplit inputSplit,TaskAttemptContext context). Context.nextKeyValue() {. Map(context.getCurrentKey(),context.getCurrentValue(),context);. 如果需要递归的读取子目录文件,那么需要设置 mapreduce.input.fileinputformat.input.dir.recursive. Mapreduce.input.fileinputformat.split.minsize. Mapreduce.input.fileinputformat.split.maxsize. 将会调用键值的toString方法,并以制表符分割,键值之间的分隔符可以通过 mapreduce.output.textoutputformat.separator. MultipleOutputs NullWritable,Text multipleOutput;. Out Of Memory Error 千万别点.

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This thing scrolls.(:. Like 'Welcome to my blog'. Navigations are on the right.( :. BABY BUGS BUNNY IS SO CUTE! Wednesday, June 28, 2006. So long nv come to my blog liao le. Coz i busy playing maple. haha. Wa lao. very sian leh. 1st day go sch, all the teacher wanna catch student lo. i am 1 of them la. 1st teacher caught me, say my hair very long. 2nd teacher caught me, say i dyed my hair(i nv lo). 3rd teacher, say my sock very low. den ask me buy sock! Can eat many thing lo. I LOVE BABY BUGS BUNNY.(:.

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Sunday, July 18, 2010. Its been a very very long time since i last blogged ,. Seriously alot had happened in this period of times . Some good , some bad . some i dunno how to say oso . lol. New workplace , old faces . wondering wat i mean? Simply cos i m working wif my bros , pros and cons . Started off with the company called. Den came the BIG. Change BEN and CHARWIN. ME , JASON , MATTHEW , DERRICK and SPENCER. In our very own company. QCARS rental n management! Kinda boring still a nice game to play .

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Http:/ xiaohei.blog.js0573.com 加入收藏. 灬 號公園 " class="userphoto" align="absbottom" /. Ξ寳唄吥哭ぉ" class="userphoto" align="absbottom" /. 婲児" class="userphoto" align="absbottom" /. 旷野" class="userphoto" align="absbottom" /. 小农夫的BLOG" class="userphoto" align="absbottom" /. 樱花若雨" class="userphoto" align="absbottom" /. 独自等待的BLOG" class="userphoto" align="absbottom" /. 琦琦大王的BLOG" class="userphoto" align="absbottom" /. 主题 每日习语brain trust Trust这个字可以用做动词,也可以用做名词。 使用频率最高的一千句英语 1. I see 我明白了。 4 Me too 我也是。 11 Not yet 还没。

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小黑的博客

系统环境说明 操作系统 Centos6.5 CDH版本 5.3 JDK版本 1.7 操作用户 root Kerberos版本 1.10.3 LDAP版本 2.4.40 Sentry版本 1.4 集群配置 机器数量 5 内存 64G 硬盘 10T CPU核心数 . 垃圾回收优化当region服务器处理大量的写入负载时,繁重的任务会迫使JRE默认的内存分配策略无法保证程序的稳定性所以我们可能需要对region服务器的垃圾回收机制进行一些参数调整 因为master并不处理实际任务,所以没有优化的必要 首先来了解JAVA内存中的几个概念 在HBase构架中我们可以 . 行健设计在HBase中有两类基本的键结构 行健和列键这两者都存储着有意义的信息,不仅仅是该键对应的值 键本身存储的内容 键的排列顺序 在HBase中,键的排序顺序是十分重要的 概念如之前所说,HBase的键分为两种 列键 包括了列族名和限定符,定位到列的索引 . 运行流程当你在MapReduce程序中调用了Job实例的Submit()或者waitForCompletion()方法,该程序将会被提交到Yarn中运行其中的过程大部分被Hadoop隐藏...

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