[jira] [Created] (IGNITE-11258) JDBC: update connection setup logic.

[Anton Vinogradov (Jira)]

Alexander Lapin created IGNITE-11258:
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             Summary: JDBC: update connection setup logic.
                 Key: IGNITE-11258
                 URL: https://issues.apache.org/jira/browse/IGNITE-11258
             Project: Ignite
          Issue Type: Task
          Components: sql
            Reporter: Alexander Lapin


# On thin client startup it connects to *all* *nodes* provided by user by client configuration.
 # Upon handshake server returns its UUID to client.
 # By the end of the startup procedure, client have open connections to all available server nodes and the following mapping (*nodeMap*): [UUID => Connection].

Connection to all nodes helps to identify available nodes, but can lead to significant delay, when thin client is used on a large cluster with a long IP list provided by user. To lower this delay, asynchronous establishment of connections can be used.
For more information see [IEP-23: Best Effort Affinity|https://cwiki.apache.org/confluence/display/IGNITE/IEP-23%3A+Best+Effort+Affinity+for+thin+clients]



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