Define read-only replication and its uses

Define read-only replication and its uses.

Read only replication creates local copy of table data originating from one or more remote master tables. An application can query the data in a read-only table snapshot, but cannot insert, update, or delete rows in the snapshot of the data.

Use:

- Can be treated as back ups of original.
- For faster query performance, read only replication is used.
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