Since cluster writes can't be unit tested, some DDL utilities had been written using catalog client calls that can be very inefficient. Considering that also batched requests are unit-testable (when using the ConfigServerFixture - as in ddl util tests), some performance improvements can be applied.

Performance problems:

• The updateTags function uses the catalog client to update tags in an extremely inefficient way.

• The deletion of chunks / tags can hit the catalog client timeout in case of a lot of documents to delete.

Action points:

• Replace updateTags logic with a simple batch update.
• Replace the above mentioned delete calls with batched deletes.