thanthos

require('dotenv').load({'path': '.env'});
var elasticSearch = require("elasticsearch");
var esRWClient = require("./esClient"); //This is es client initialization 
var esRClient = require("./esClient_readOnly");
var bunyan = require('bunyan');

var target_index =  process.env.target||'reindex'; //Change this to your target index .
var source_index =  process.env.source; //Change this to your source index.

var global_scroll_id;

thanthos

#Reindexing your Elasticsearch indice with limited resource can be a painw when you have limited resources and need it running at the same time
#Hence it is advisable to size up the quantity and break it down into chunks based on time. 
#Look to Kibana. The break down is already done for you even as you perform your search. 
#Just pop up the request and the aggregation query is there. 
#Using this, you can tally your document count according to time to verify your activities. 

#I need to do this as due to resource constrains. Logstash input plugin sometimes hit into error and the plugin restart. 
#When it restarts the query get executed again. With logstash plugin-input-Elasticsearch, it resume a new search. 
#Any previous scroll ID is discarded. This is something you do not want happening. 
#You can end up with more document in the target than the source. #Thus breaking it down to chucks limit the corruption and makes remediation easier.