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最新评论
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di1984HIT：
这个是默认的。！
ElasticSearch (3) Java API -- put mapping to index -
di1984HIT：
谢谢，学习了~~~
ElasticSearch (3) Java API -- put mapping to index -
di1984HIT：
写的很好，谢谢啦
ElasticSearch (3) Java API -- put mapping to index -
swzzm：
.............文件加密了,密码了
Hive + Hbase
文章列表
ThreadLocal
http://blog.csdn.net/qjyong/article/details/2158097
http://lavasoft.blog.51cto.com/62575/51926/
http://lujh99.iteye.com/blog/103804
http://javarevisited.blogspot.hk/2012/05/how-to-use-threadlocal-in-java-benefits.html
http://javapapers.com/core-java/threadlocal/
htt ...
Java 容器快速报错(fail-fast)机制
如果你在迭代容器元素的过程时,有别的方法添加,删除或者修改了元素的值,这个时候就会抛出ConcurrentModificationException.
实现机制:以ArrayList为例,它调用iterator方法时候,其实是调用 ...
cluster setting
shards : 5
replica : 0
There are 3 ES nodes.
NODE_1 master
NODE_2
NODE_3
After some indices are completed, using the segment api we can see that there are 5 primary active shards.
NODE_1 (master) shard1, shard2
NODE_2 shard3
NO ...
// make sure the index existing before putting the mapping
Map map = client.admin().cluster()
.health(new ClusterHealthRequest(indexName)).actionGet()
.getIndices();
// map is always empty!!??
boolean exists = map.containsKey(indexName);
if (!exists) {
client.admin().ind ...
#get all the log events by logtype with a single value tomcat
curl -XGET 'http://ES_HOST_SERVER:9200/INDEX_NAME/153299/_search' -d '{
"query" : {
"term" : { "logtype" : "tomcat" }
}
}
'
#get all the log events by logtype with valu ...
http://www.elasticsearch.org/
http://elasticsearch-users.115913.n3.nabble.com/
https://groups.google.com/forum/?fromgroups=#!forum/elasticsearch
##### index settings #####
http://ES_HOST_SERVER:9200/INDEX_NAME/_settings
##### pretty format #####
http://ES_HOST_SERVER:9200/15 ...
Q1
Sometimes SCM manger lose connection with agent because the agent is dead.
A1
You should start the agent service.
$cd /etc/init.d
$./cloudera-scm-agent status
$./cloudera-scm-agent start
Cloudera distribution (CDH3 & CDH4) uses an agnet to control and monitor nodes. If the agent st ...
1. Find out what the current open file descriptor limit is.
$more /proc/sys/fs/file-max
753825
or
$sysctl -a | grep fs.file-max
fs.file-max = 753825
2. View how many open file descriptors are currently being used.
$more /proc/sys/fs/file-nr
4080 0 753825
3. Edit the kerne ...
Jenkins installation
- 博客分类：
- 软件综合
ENV list
OS : redhat linux enterprise server 5.6
Install Jenkins
1. download rpm installer from http://pkg.jenkins-ci.org/redhat/
2. logon your system, scsu to root
$pwd
/root
$ls
apache-ant-1.8.4-bin.tar.bz2 jenkins-1.488-1.1.noarch.rpm
$
3. install it
rpm -ivh jenkins-1.488-1.1.no ...
http://www.yaml.org/
YAML: YAML Ain't Markup Language
What It Is: YAML is a human friendly data serialization
standard for all programming languages.
YAML Resources:
YAML 1.2 (3rd Edition): http://yaml.org/spec/1.2/spec.html
YAML 1.1 (2nd Edition): http://yaml.org/spec/1.1/
YA ...
Jenkins SVN
- 博客分类：
- 软件综合
$pwd
/root/.jenkins/jobs/projectName_wasce/workspace
$ls -a
. build-parser.xml .project
.. build.xml solr-projectName
build .classpath src
build-collector.xml conf .svn
build-common.xml ...
Java 字符串本质
- 博客分类：
- java
Java字符串本质上是char序列组成.char是一个采用UTF-16编码表示Unicode代码点的代码单元.大多数的常用Unicode字符使用一个代码元就可以表示,而辅助字符需要一对代码元表示.具体编码规范见 http://ilnba.iteye.com/admin/blogs/1612414 length方法将返回采用UTF-16编码表示的给定字符串所需要的代码单元数量.
public class StringTest {
public static void main(String[] args){
String greeting="\uD9 ...
FAQ
1. Lease does not exist
http://www.linuxlefty.com/SysAdmin/lease-does-not-exist-error-hbase-export.html
Hbase Performance Tool
http://wiki.apache.org/hadoop/Hbase/PerformanceEvaluation
Optimizing HBase MapReduce scans (for Hive)
http://gbif.blogspot.hk/2012/05/optimizing-hbase-mapreduce-sca ...
http://www.shaunabram.com/multiple-tomcat-instances/
http://www.coderanch.com/t/550067/Tomcat/Starting-Stopping-multiple-instances-apache
http://kief.com/running-multiple-tomcat-instances-on-one-server.html
http://stackoverflow.com/questions/1794444/use-multiple-catalina-base-to-setup-tomcat-6-ins ...
GET VS POST
- 博客分类：
- 软件综合
http://mzhou.me/?p=77001
http://www.diffen.com/difference/Get_vs_Post
http://stevenclark.com.au/2008/01/12/get-vs-post-for-the-beginner/
http://www.cs.tut.fi/~jkorpela/forms/methods.html
http://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url