How can build Bond graph?

[ruslan usifov]

Hello

Does anybody have receipt how possible effectively hold  Bond graph in
cassandra. For example relations between users in social
networks(friendship).
Simplest that comes to mind is follow keyspace

<Keyspace Name="test_1">
  <ColumnFamily Name="friends" CompareWith="LongType"  />
</Keyspace>


But this have a minus, if one user have many many friends, and all relations
for this one user will by hold on one node. What kind of data design should
i use to avoid problem?

Thanks