By default, Elasticsearch indices are configured with one primary shard and
one replica at index creation. This configuration can tolerate a failure of at most one host while
Elasticsearch migrates shards to rebalance the cluster. You can scale up the default Elasticsearch
replicas to increase redundant copies of your data.
Before you begin
- Increasing the replicas also increase the disk usage. For more information about preventing full
disk or high watermark issues, see Configuring Elasticsearch disk usage.
- The procedure modifies the index at index creation. The changes will apply to indices created
the day after the changes are made as the indices for the current day is created.
- The maximum replicas that can be configured is N-1, where N is the number of hosts in the
resource group the Elasticsearch data service is configured to use.
Procedure
-
Stop the Elastic Stack services. For more information, see Stopping Elastic Stack services.
- Open in a text editor the
$EGO_CONFDIR/../../integration/elk/init/template/ibm-symphony-report-charge-back.json
configuration file.
Remember: For local installation, you must complete this step on all management hosts in
your cluster.
Replace the value in
"number_of_replicas" : 1 with the number of replicas
that you want to increase. For example, the replicas in the following configuration are modified to
two replicas to tolerate a failure of two hosts:
{
"index_patterns": "ibm-symphony-report-charge-back*",
"order": 1,
"settings": {
"index": {
"number_of_shards": 1,
"number_of_replicas" : 2
}
},
"mappings": {
"properties" :{
"Type": { "type": "keyword" },
"CHARGEBACK_VALUE":{
"type":"double"
},
"EVENT_TIME":{
"type":"date"
},
"CLUSTER_NAME":{
"type":"keyword"
},
"CONSUMER_NAME":{
"type":"keyword"
},
"RESOURCE_GROUP":{
"type":"keyword"
}
},
"date_detection" : true,
"numeric_detection" : false,
"dynamic_templates":[{
"str":{
"match": "*",
"match_mapping_type": "string",
"mapping":{
"type": "keyword"
}
}
}]
}
- Restart the Elastic Stack services. For more information, see Starting Elastic Stack services.