SC-2190 : ES scaling - reindexing Org index

About

The org index mapping has been reviewed and optimised to reduce the index size without limiting any of the search capabilities.

Steps to re-index the data with the new mapping:

First check the number of number_of_shards & number_of_replicas from old org index by running below curl

curl --location --request GET 'http://localhost:9200/_cat/indices/%2A?v=&s=index:desc'

2. Create new org index with name as orgv{x} // x is version number and update the org mapping using ES Mapping jenkins job {OpsAdministration/job/dev/job/Core/job/ESMapping/}

3. After updating org mapping, run the reindex curl

curl --location --request POST 'localhost:9200/_reindex?pretty' \
--header 'Content-Type: application/json' \
--data-raw '{
  "source": {
    "index": "{old_org_index_name}"
  },
  "dest": {
    "index": "{new_org_index_name}"
  }
}'

4. After updating replica , add alias to the new index with alias name as org_alias , by below curl

curl --location --request PUT 'localhost:9200/{new_index_name}/_alias/org_alias?pretty'

Note : If alias name changed other than org_alias, update the learner env for org_index_alias

To remove alias binding from old index run the below curl

5. Deploy the learner and check the disk usage , replica number for the new index by running the below curl