The coldPath parameter defines the path for the cold buckets, which are the oldest and least frequently accessed data in an index1. By setting the coldPath to point to the NAS mount point, the Splunk administrator can achieve the retention strategy of having older data on slower NAS storage.

When creating new user roles in Splunk, it's recommended to define roles that incorporate the necessary capabilities and index access permissions. This approach allows for granular control over user access and aligns with best practices for role-based access control.
"You can create custom roles and assign those roles to your users. Custom roles let you make granular adjustments to user access, including... Role inheritance... Capabilities... Allowed and default indexes..."
- About configuring role-based user access -
By creating roles that incorporate both capabilities and index access, administrators can efficiently manage user permissions and maintain a secure Splunk environment.
Reference:
About configuring role-based user access - Splunk Documentation

When a user is assignedmultiple rolesin Splunk and each has a defined srchFilter, Splunk combines these filters using alogical ANDoperation. This ensures that the user can only search within the intersection of constraints imposed by each role.
From Splunk Docs:
"If a user has multiple roles assigned and multiple roles specify srchFilter, Splunk softwareANDs the filters together."
- Source: Splunk Documentation - authorize.conf
Let's break it down:
role_A specifies: sourcetype!=json AND index=main
role_B specifies: sourcetype=csv
To evaluate the effective search filter for the user, Splunk willANDthe two conditions:
(sourcetype=csv) AND (sourcetype!=json AND index=main)
This means the user's search is limited to events where:
sourcetype=csv (from role_B)
sourcetype!=json AND index=main (from role_A)
Combining them together logically:
srchFilter = ((sourcetype=csv) AND (sourcetype!=json AND index=main))
This is exactly what is shown inOption A.
Reference:
authorize.conf - Splunk Admin Manual

https://docs.splunk.com/Documentation/Splunk/8.2.2/Admin/Distdeploylicenses#:~:text=License%
20requirements,do%20not%20index%20external%20data.
"All Splunk Enterprise instances functioning as management components needs access to an Enterprise license. Management components include the deployment server, the indexer cluster manager node, the search head cluster deployer, and the monitoring console."
https://docs.splunk.com/Documentation/Splunk/8.2.2/Updating/Aboutdeploymentserver
"The deployment server is the tool for distributing configurations, apps, and content updates to groups of Splunk Enterprise instances."