In development, with the iteration of business requirements, more business logic will need to be updated or even refactored. For es, in order to adapt to the new business logic, it may be necessary to do the original index Some modifications, such as making adjustments to certain fields, even rebuild the index.
When doing these operations, it may have an impact on the business, even downtime adjustments and other issues.
Therefore, es provides index aliases to solve these problems. Index aliases are like a shortcut or soft link. They can point to one or more indexes, or you can use any API that requires an index name. The application of aliases provides great flexibility for the program.
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