Mongo modifies the replica set name

All businesses are placed in one Mongo instance, causing one business to fail and affecting all businesses. So they split it up.

Splitting works by adding nodes to the original replica set, synchronizing the data, and then switching.

The replica set name is named after the business. To be consistent with the business, change the replica set name.

Finally, the new replica set can add the node itself.

Process for changing replica set name:

The replicset name is the DBA

var newId = 'dba_new'

var doc = db.getSiblingDB("local").system.replset.findOne()
var oldId = doc._id
doc._id = newId
db.getSiblingDB("local").system.replset.save(doc)
db.getSiblingDB("local").system.replset.remove({_id: oldId})

After replSet= DBA_NEW, restart the configuration file.