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oldrat：
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Kafka: High Qulity Posts
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clone a centos vm, there is no ethX device. To fix the problem,following the steps
1.# rm -f /etc/udev/rules.d/70-persistent-net.rules
2.# vim /etc/sysconfig/networking/devices/ifcfg-ethx
//the obove file doesn't exist in my system
/etc/sysconfig/network-scripts/ifcfg-ethx
update MAC and ...
Download
1.download the latest tarball from http://www.apache.org/dyn/closer.cgi/oozie/4.0.0
2.#tar -xzvf oozie-4.0.4.tar.gz
Build
According to official document, when run build command
$ bin/mkdistro.sh
there are some errors. By default it builds against Hadoop 1.1.1 and the bu ...
change hostname under centos
#hostname newhostname
#hostname
when poweroff, the hostname is still stale without changed
--------------------------
to change hostname permanently.following these steps
#vi /etc/hosts
127.0.0.1 newhostname localhost
#vi /etc/systemconfig/network
HO ...
sqoop是关系型数据库与hadoop之间传递数据的一个工具．
下载sqoop 1.99.3按包里的文档安装，出现了以下一些问题：
１．启动sqoop.sh server start 时，服务器不能启动，查看sqoop.log发现配置的hadoop目录不是正确的目录或权限不正确．我仔细检查了路径，绝对正确．上网ＧＯＯＧＬＥ也没有找到解决办法，仔细回想，原来我将sqoop server安装到与hadoop namenode/resourcemanager相同的机子上，而配置的hadoop配置目录是解压后etc/hadoop这个目录，当hadoop运行时，也会用到这个目录，会对这个目录进行保 ...
mysq privileges
- 博客分类：
- mysql
mysql assign privileges to users.
install mysql-workbench under ubuntu
#sudo apt-get update
#sudo apt-get install mysql-workbench
#mysql-workbench
#mysql -u root -p
mysql>select host,user,password from mysql.user;
mysql>show grants for 'root'@'localhost';
mysql>grant all on s ...
#vi /etc/hostname
new_hostname
[root@localhost ~]#
vi /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE="Ethernet"# change
BOOTPROTO="
none
" DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUT ...
1. when put local file to HDFS using #hadoop fs -put in.txt /test, there is a error message:
hdfs.DFSClient: Exception in createBlockOutputStream java.net.NoReouteToHostException
solution: shutdown firewall in all nodes(non-secure mode, if run in secure mode, you should maual configure the fir ...
hadoop 2..30的官方tarball中 ./lib/native中的库只适合32位操作系统，在64位下安装会报一些错误，使用hadoop启动不起来。所以需要在64位上重新编译。
1. enviroment
hadoop 2.3.0
ubuntu 12.04 64
2. follow these steps to recompile hadoop
sudo apt-get install g++ autoconf automake libtool make cmake zlib1g-dev pkg-config libssl-dev
a. install ...
Installing hadoop 2.2.0 clusters with 3 nodes(one for namenode/resourcemanager and secondary namenode while the other tow nodes for datanode/nodemanager)
1. ip assignments
192.168.122.1 namenode
192.168.122.2 datanode
192.168.122.3 datanode
2. download the late ...