About Registry Pattern

[Tertius]

I already read some article about Registry Pattern,

 

my understanding for pattern is that.

 

for singleton pattern,

it ensure that the app use the same instance, without making more.

but for sometimes you really need 2 instances from same class but like different configuration inside.

 

for example, you want a DB instance connect to localhost ,also a Db instance connect to remote server.

 

then, this pattern limit you.

 

so Registry Pattern comes to save,

 

it allows you to ensure that the app use the same instance, also, you can make some more instance for your app specific need, still it can help you to limit the instance you use,

 

can someone correct me or add some understanding that can help completing this?