Hi,

What are the best practices for Accumulo to implement a custom
authorisation module where user authorisations assigned dynamically based
on different attributes like time, location and ...

Is implementing "Query Services Layer
<https://accumulo.apache.org/1.7/accumulo_user_manual.html#_query_services_layer>"
recommended for power users who access Accumulo for large data analysis via
clients like Spark?

Thanks,
Mohammad