ES Query on a Dynamic Object
if the field "enabled: false', it means indexing on this field is disabled, so can not use . to concatenate and search, need to use...
Use Logstash To Copy Elasticsearch Index
input { # We read from the "old" index elasticsearch { hosts => [ "172.16.5.151:9200" ] index => "my_test" user => "admin" password...
SNMP Commands
check port: netstat -tuanlp | grep 8162 router conf for snmpv3 (172.17.254.238) ----------------------------------------------...
Elasticsearch Mapping Operations
http://queirozf.com/entries/elasticsearch-mappings-examples-on-how-to-create-edit-remove
Elasticsearch using script to query object
{ "bool" : { "must" : [ { "term" : { "requestId" : { "value" : "0f6b1e41-5457-4a75-b5f1-d88ed899a1a6", "boost" : 1.0 } } }, { ...
Java Exception Handling
The try block will execute a sensitive code which can throw exceptions The catch block will be used whenever an exception (of the type...
Java Object Cone
public class Employee implements Cloneable{ private int empoyeeId; private String employeeName; private Department department; public...
Database scaling methods
Vertical Scaling Vertical scaling, or improving the capabilities of a node/server, gives greater capacity to the node but does not...
Storm Parallelism
A worker process executes a subset of a topology. A worker process belongs to a specific topology and may run one or more executors for...