Using index aliases instead of mapping types as part of migration

Hi,

I'm looking at migrating a cluster running on ES 5.3 to either ES 6.3 or 6.4. As part of our migration, we need to remove our mapping types. My original idea is to split each type out as an alias, and add a postfix that was the mapping type.

i.e. instead of

PUT   index_name/doc_type/id

have

PUT   index_name_doc_type/_doc/_id

and then create a wildcard alias on the index name

POST _aliases
{
    "actions" : [
        { "add" : { "index" : "index_name_*", "alias" : "index_name" } }
    ]
}

Is there any reason I shouldn't do this?

Thanks,
Victor

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