Summary of "2. NetWorker processes/daemons"

Overview

This tutorial/demo explains the main daemons (processes) used by Dell/EMC NetWorker, what each one does, and how to list, start, and stop NetWorker services on Linux (systemd and init.d) and Windows. The demo uses a server that contains all roles to show service management across environments.

NetWorker roles

Client — the machine being backed up (runs the remote execution daemon).
Storage node — a machine that provides backup device access (acts as both client and storage node).
Master/server — the backup server that provides server and storage components and orchestrates backups.

Key NetWorker daemons and responsibilities

nsrexecd (Networker Remote Execution Daemon)

Runs on clients to accept and execute remote requests from the server (used to initiate backups and recoveries).
Negotiates RPC ports for NetWorker communication (video notes a default RPC port range).

nsrsnmd (Networker Storage Node Management Daemon)

Runs on storage nodes to provide RPC-based device management services.
Ensures device operations are performed for nsrd.

nsrmmd (Networker Media Multiplexing Daemon)

Runs on storage nodes to read/write backup data to devices or volumes.
Reports write status back to the server.
One nsrmmd instance is started per configured device.

nsrlcpd (Networker Library Control Daemon)

Spawned by nsrmmgd to control jukebox/library resources (slots, transports, access points).
Returns status to nsrmmgd.

nsrd (Networker Server Daemon)

The master daemon on the NetWorker server.
Manages the network resource database and starts other server daemons.
Starts automatically at boot and orchestrates server-side services.

nsrmmdbd (Media Management DB Daemon)

Provides read/write access to the media management database.

indexd (Index Daemon)

Provides read/write access to the client file index database (used for recoveries and indexing).

nsrjobd (Job Daemon)

Coordinates scheduled backups.
Stores schedule information and supplies job data to the NetWorker Server / NMC for reporting.

nsrmmgd (Media Management Daemon)

Manages library operations (jukeboxes).
Started by nsrd when services are started or when a jukebox is configured/enabled.

NetWorker Console (NMC) related processes

httpd (Apache) — serves the NetWorker Console (NMC) web pages.
gstd (General Service Toolkit Daemon / GSTD) — master console process; after a console client connects, GSTD handles all subsequent console communications.
Postgres — stores GST/NMC data about backups, recoveries, cloning and is used for reporting.

How to list and control NetWorker services

systemd (RHEL/CentOS 7+ and other modern Linuxes)

Check status:
- systemctl status networker
Start service:
- systemctl start networker
Stop service:
- systemctl stop networker
Note: replace “networker” with the console service name (for example, gst) to control console-related daemons.

init.d (older RHEL/CentOS / SysV)

Use the scripts under /etc/init.d, for example:
- /etc/init.d/networker start|stop|status

Windows

Use Task Manager or the Services console to view, start, and stop NetWorker services (examples: Remote Exec, NetWorker Server, NMC/console service entries).

Practical notes / operating details

nsrd is the primary server daemon and launches other server-side daemons on startup.
nsrmmd runs once per configured device; nsrlcpd is spawned as needed for library control.
GSTD + Postgres + httpd are central to the NetWorker Console (NMC) and reporting.
The demo demonstrates checking and managing these services on a server containing all roles.

Content type and source

Type: Tutorial / demo — explanation of NetWorker daemons followed by a short demo of listing and managing services across systemd, init.d, and Windows.
Speaker: Unnamed instructor/demonstrator of Dell/EMC NetWorker concepts and administration.

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