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1. What is mahout? Mahout is an open-source project (http://mahout.apache.org/) of Apache that provides several classic algorithms in the machine learning field, allowing developers to quickly build machine learning and data mining applications. Mahout is based on hadoop. The name is also very interesting. hadoop is the name of an elephant, while mahout is like a husband and a viewer. It can be seen that the two are closely related. (This naturally reminds me of sun and eclipse ...) At this ti

), leading to data communication problems between worker nodes, task Scheduling is affected. Ii. Kafka performance bottleneck When Kafka is integrated with storm, the data processing performance is not very good and does not meet the expected requirements. I initially suspected that it was a kafkaspout code problem, but storm external has included it. I don't think the problem is here. Then, let's take a look at kafkaspout implementation and find possible performance bottlenecks. To increase

/iptables-A input-m state--state new-m tcp-p tcp--dport 6379-j ACCEPTRestarting the firewall# Service Iptables RestartSet Redis to environment variable# Vim/etc/profileExport path= $PATH:/usr/local/redis/binMake the REDIS environment variable effective# Source/etc/profileStart Redis#/usr/local/redis/initscript/redis StartThrough client inspection# redis-cli–p 6379650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/8B/E6/wKiom1hbrE-R4b9LAAAO98fRTP0850.png "title=" Sss.png "alt=" Wkiom1hbre

Chaincode program, named T3SSH // Enter virtual machine core_peer_address=172.17. 0.3:7051'{"Args": ["Init"]}'// deployment ChaincodePrint at T2 Terminal:02:07:10.906 [Shim] Debu: [mycc01]received message INIT from Shim02:07:10.906 [Shim] Debu: [Mycc01]handling chaincodemessage of Type:init (state:established)02:07:10.907 [Shim] debu:entered State init02:07:10.907 [Shim] Debu: [mycc01]received INIT, initializing Chaincode02:07:10.908 [Shim] Debu: [Mycc01]init succeeded. Sending completed02:07:1

Install and use Git standalone version Introduction: Git is an open-source distributed version control system. It is one of the most popular and advanced version control software today.Git is a distributed version control system. On the contrary, SVN is a centralized version control system. Each time SVN changes a file, it must be submitted to the server for storage, and Git has a complete local version library. 1. Install Git 1. Linux (CentOS) Shell>

$ export DISPLAY =: 0.0 // This is the case for installing on the local machine. If it is on another terminal, change it to export DISPLAY = ip: 0.0, this is because 127.0.0.1 of the local machine is omitted. 3. Execute the graphical interface installation steps: Step 1: do not check the check box, do not fill in the email, directly go to the next step, ignore the pop-up warning box (no email warning is provided) The pop-up warning is as follows: Step 2: select the installation type (cr

Oracle standalone environment enables automatic database startup upon startup In both Windows and Unix environments, Oracle databases can be automatically started. In Windows: The experiment method is relatively simple. It can be implemented by modifying the registry or using the oradim command: Oradim-edit In Unix: Experiment with the dbstart command that comes with the database. Command: dbstart + {full path of ORACLE_HOME} Principle: 1. When the o

Sometimes we need to invoke different versions of Python packages and modules in our program, so we can use Virtualenv's virtual environment to help us isolate them, so let's take a look at installing Windows with virtualenv to create a standalone Python environment 0. When will the virtualenv be used?Suppose that the two applications in the system, where a application to the library Libfoo version requirements of 1, and B application to the same lib

installed, you need to install it first:If make is not installed, you need to install it first:sudo apt-get install make3), switch to the redis-3.0.7 directory, compile the program, install the program (if you want to install make on the server): Make"If an error is encountered" make[1]: Entering directory '/home/cb/environment/redis-3.0.7/src ' CC adlist.o .....Then execute the following command to compile:Make MALLOC=LIBCCompiled successfully:4), into the SRC directory, the interpretation of

Premise, jdk1.7,scala,hadoop single node installedSteps:Spark-env.sh join: hadoop_conf_dir=/root/------ indicates that you are using resources on HDFS, and if you need to use local resources, log out of this sentence2,slaves3,spark-defalts.conf--------------------------------------------------------------------------------------------------------------- --Start:cd/root/soft/spark-1.3.1sbin/start-master.sh Start Master Sbin/start-slaves.sh start workerFrom for notes (Wiz)Install

Test instructions: The company has n people to form a tree structure, in addition to the boss have only a direct boss, ask to choose as many as possible, but not at the same time select a person and his direct supervisor, ask the maximum number of people can choose, and is not the only solution.Analysis: This question is almost the biggest independent set problem of the tree, but one more judgment uniqueness. Use two arrays, one to record the number of people, one to judge uniqueness.D[u][0], in

personally test).The software engineering provided in this article is based on the St standard Peripheral Library, rather than using STM32CUBEMX to establish the project. Personally feel that using ST's standard Peripheral library suitable for learners, STM32CUBEMX building engineering structure complex, for learners, especially beginners are estimated to be headache.Today's project is based on the project "stm32f0xx_tim Basic Delay configuration Detailed process" modified, the above examples a

"/>DAG Replication Network configuration is simple, after entering the replication network name, add the DAG private subnet segment, the system will automatically identify the network segment of the two DAG network card IP, tick the bottom of the "Start Replication", click Save.650) this.width=650; "Width=" 518 "height=" 726 "title=" image "style=" border-top-width:0px;border-right-width:0px; border-bottom-width:0px; "alt=" image "src=" http://s3.51cto.com/wyfs02/M00/7D/31/wKiom1biHEWCECMlAAA_

First, prepare the software Install Java1.8 and Tomcat9 in advance. Download Solr6.1, website location: http://mirrors.tuna.tsinghua.edu.cn/apache/lucene/solr/6.1.0/ 3. Extracting filesSecond, installation1. Copy the WebApp folder under the Solr-6.1.0\server\solr-webapp folder to the Tomcat installation directory \webapps\ directory and change to SOLR2. Copy all jar packages under the Solr-6.1.0\server\lib\ext\ directory to the Tomcat installation directory \webapps\solr\web-in

jdbc:phoenix:localhost None org.apache.phoenix.jdbc.PhoenixDriverConnecting to Jdbc:phoenix: localhost -/ One/ , -: -: toWARN util. nativecodeloader:unable to load Native-hadoop Library forYour platform ... using builtin-Java classes where applicableconnected To:phoenix (version4.8) Driver:phoenixembeddeddriver (version4.8) autocommit Status:trueTransaction isolation:transaction_read_committedbuilding List of tables and columns forTab-completion (Set Fastconnect totrueTo Skip) ... the/ the( -%

Download the stable version of HBase from the Apache official website: http://mirror.bit.edu.cn/apache/hbase/stable/hbase-1.1.2-bin.tar.gz Unzip to any directory on this machine, on my computer is/home/jason/hbase:tar XVFZ hbase-1.1.2-bin.tar.gz Modify the/etc/profile file to increase the environment variableHttp://my.oschina.net/u/914897/admin/new-blogexport hbase_home=/home/jason/hbase/hbase-1.1.2Export path= $PATH: $HBASE _home/bin Source/etc/profile make configuration effective C

One, the ZK alone to build1. Modify the configuration file: Conf/zoo.cfgJava code Ticktime= Datadir=/home/hadoop/data/zookeeper clientport=2181 initlimit=5 synclimit=2 Server. 1=slave-:2888:3888 Server. 2=slave-:2888:3888 Server. 3=slave-:2888:3888 2. Generate the myID fileJava code In the slave-01 echo "1" >/home/hadoop/data/zookeeper/myid In the slave-02 echo "2" >/home/hadoop/data/zookeeper/myid In the slave-03 ec

CodeUITestExe.exe, and when you do the test, you can C:\Program Files\Microsoft Visual Studio 10.0\ when the DLL is not found The DLL under Common7\IDE\PrivateAssemblies is copied to debug under the Microsoft.VisualStudio.TestTools.UITest prefix.When you copy the program code to another computer, you will be prompted to "cannot perform" on the control error when you perform the test, and continue to find the error "CLSID {6DA215C2-D80D-42F2-A514-B44A16DCBAAA} Failed due to the following error:8

,y); thep2[i]=Make_pair (x, y); the } theun=N;94 for(i=0; i) the { the for(j=0; j) the {98 intx1=P1[i].first; About inty1=P1[i].second; - intX2=P2[j].first;101 intY2=P2[j].second;102 if((x1==x2y1==y2) | | (x1+1==x2y1==y2) | | (x1==x2y1==y2+1)|| (x1+1==x2y1==y2+1))103 {104 Addedge (i,j); the }106 }107 }108printf"%d\n"

1. First download the http://mirror.bit.edu.cn/apache/hbase/hbase-1.0.1/hbase-1.0.1-bin.tar.gz installation package from the official website 2. Unzip to the installation directory, TAR-XVF hbase-1.0.1-bin.tar.gz 3. Modify Conf/hbase-site.xml 3. Modify Hbase-env.sh, add Export Java_home=/usr/java/jdk1.7.0_75/export Hbase_classpath=/usr/hbase-1.0.1/confexport HBASE_MANAGES_ZK=true Note: A distributed run of HBase relies on a zookeeper cluster. All nodes and clients must be able to access the zoo