Hi Abhilash,

1) Your question isn't entirely clear, but if the database only resides on 
Server 1, there's no way to ask an instance running on Server 2 to 
communicate with Server 1 for the unique database.  You would need to open 
a separate connection to the instance with the database you need.

2) The distributed-config.json file is where you can edit which server 
nodes each cluster is replicated to.  Each class you create has a default 
cluster with the same name where all its records are stored.  You can 
create multiple clusters for every class, if you so choose, and you specify 
which cluster a record is inserted in.  You could have a Class named 
MagicData that has two clusters: MagicDataA and MagicDataB.  The MagicDataA 
cluster could be stored on nodes server1, server 3, and server 5; and you 
could have the MagicDataB cluster stored on server2, server4, and server6.  

If you looked in the hypothetical distributed-config.json file, you'd look 
for a cluster called MagicDataA, and you'd see that server1, server3, and 
server5 were specified for replication.

Best regards,

-Colin

Orient Technologies

The Company behind OrientDB




On Thursday, June 18, 2015 at 2:12:22 AM UTC-5, Abhilash Panigrahi wrote:
>
> I'm new to distributed databases. I configured a distributed OrientDB 
> configuration on multiple EC2 instances and they recognize each other and 
> are communicating with each other. 
>
> 1) Now, suppose I have a particular database on server 1 and not on server 
> 2. If I set autoDeployment=false, server 2 only downloads a distributed 
> config for the said database on server 2 and not the entire database. If I 
> query server 2 for data from the database, it says it does not have access 
> to the database. Is there a way to configure such that my OrientDB DBMS can 
> find out where the data is in the distributed database and I can ping one 
> server and get whatever data I need? Or does OrientDB supports only 
> complete replication?
>
> 2) Is there a way I can set a replication count to the number of copies I 
> want to maintain, in a 4 node cluster? i.e Suppose I insert a document into 
> server 1 and want one more copy of the data on any of the other 3 nodes. 
> How do i set this up? 
>
>

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