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ADM & VBD keyspace issues

Hello All,

@CBA we are upgrading from Pega 7.3 to Pega 8.3.1, found different behavior from Pega 8.3.1.

Pega 7.3 Cassandra Settings with Active/Active Data Centers :

1) prconfig.xml settings

<env name="dnode/yaml/endpoint_snitch" value="GossipingPropertyFileSnitch"/>

<env name="dnode/cassandra_datacenter" value="nwdc"/>

<env name="dnode/default_write_consistency" value="ANY"/>

<env name="dnode/default_read_consistency" value="ONE"/>

2) Cassandra-rackdc.properties file content

dc=nwdc

rack=rack1

with these settings, adm keyspace use to create during the node start up.

with 8.3.1, same settings are resulting different behavior:

1) we are noticing nwdc_adm, nwdc_vbd keyspaces are created by Pega

2) after some time we did notice only adm keyspace also generated not sure why?

couple of questions:

1) why Pega creates datacenter_adm keyspaces for only adm & VBD? not for other keyspaces Pega manages i.e Data/states...

2) why Pega creates datacenter_adm, adm keyspaces?

3) we would already have data accumulated in adm keyspace from 7.3 version- how does this data will be moved into datacenter_adm keyspace?

Thanks,

Ravi