hai everyone, Can anyone help with the below doubts:
- Whether MongoDB have any architecture like Master to Master replication like MySQL?
- In sharded cluster whether there is any option that the complete data is available in all sharded replica sets?
Welcome to the community @Vijo_Jose 
!
- No but in case of master failure, automatic election of a new one.
- Yes you talk about read concern.
We see in your two questions, especially the second, a lack of knowledge of the MongoDB architecture.
I recommend you take the free M103 MongoDB University course. You will discover how replica sets and sharding work.
Sure i have joined the course today.
But I have question . Can you please clarify on that.
I have done the shading with 3 config server and 2 shared cluster server between my two locations.
Config server have location A 2 server and location B one server and location A is primary.
Shared replica set 1 : have location A 2 server and location B one server and location A is primary.
Shared replica set 1 : have location B 2 server and location A one server and location B is primary.
and 1 mongo router in Location A and Location B.
In the above case : when the connectivity between lose between Location A ad Location B my mongo router my complete system goes down and when am acessily through router am getting below error;
“code” : 133,
“codeName” : “FailedToSatisfyReadPreference”,
I want to achieve something like below image. when the connectivity also i shoud be able to read and write on my both locations.
Can someone help on this ?