1. Node contains data as document
2. one cluster contains multiple nodes.
3. the document contains data as json format.
3. multiple documents group together to make indices.
Replication is about maintaining real-time copies (primary and replica shards) of data within a cluster to ensure high availability, fault tolerance, and improved read performance.
Snapshot is about creating backups of your data and settings at a specific point in time. Snapshots are useful for disaster recovery, migration, and long-term data retention.
Invertes index- > for text search
keyword: sorting or aggregation
"name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
so this name field will store in inverted index as well in doc_value also up to 256 char
"type" : "text", -> store in innverted index
using below store in doc value as well that will use for sort and aggregation.
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
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