Can someone explain the major points of difference between Index Mapping and Template, since many examples described were not clear enough, Can someone explain difference with an example?
As the name says this is template which an index can take. you can predefine all settings like
- primary shards
- number of replicas
And you can also define a index-mapping inside a template. (i will get to it below)
Then you also can add a patterns of indices name where theese templates should be activated. So example index-pattern in index-templates says
test-*. So each index with names like test-1, test-abc etc will take the settings
Think about a document. This is a json file which lands inside an index. And a json file has attribute and values. And know for analysing elasticsearch needs to know wihch attribute contains what type of value(is it a text, or a keyword or a timestamp). So this can be defined in an index-mapping.
Conclusion: index mapping contains information about what kind of values is inside an index. An Index-template contains predefines index options(settings, mappings, analyzer) which will get adapted to an index on creation.
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