Dell NetWorker 19.9 Administration Guide

Processes on NetWorker hosts

Each NetWorker host requires processes to provide configuration and management support of the NetWorker software.

NetWorker Authentication Service

To support the NetWorker Authentication Service feature, one or more tomcat processes start on the NetWorker Server. The tomcat process provides the authentication service with a database server instance, which enables the authentication service to manage tokens and supports user database management.

NetWorker REST API

The NetWorker REST API service is deployed in the same Apache Tomcat container as NetWorker Authentication Service. The NetWorker REST API uses the same set of Tomcat processes to deliver its service.

NetWorker Client

The nsrexecd process runs on a NetWorker Client. This process authenticates and manages NetWorker Server remote execution requests and starts the save and savefs processes on the client to support backup requests.

NetWorker Server

The following table summarizes the processes that support the NetWorker Server software.

Table 1. NetWorker Server processesThe following table summarizes the processes that support the NetWorker Server software.
Process	Function
nsrctld	The top-level NetWorker Server process that monitors, stops, and starts all NetWorker Server processes.
nsrd	NetWorker save and recovery daemon. The main service that controls other services on the NetWorker Server, clients, and storage nodes. Monitors active save or recover program sessions. In response to a recover session, nsrd spawns an agent process, ansrd.
nsrmmdbd	NetWorker save and recover media management database service daemon. Provides media database management services to the local nsrd and nsrmmd services and records entries in the media database.
nsrjobd	Monitors NetWorker activity during a backup or recovery operation.
nsrindexd	Provides an indexing service to read, write, and remove index entries. The nsrd service starts one nsrindexd process on the NetWorker server. The nsrindexd process spawns an additional helper nsrindexd process for each index session. NetWorker uses index sessions to read, write, or delete index entries, for example, when NetWorker saves an index, or when a user performs a file-level or browsable recover. When the read or write operation completes, the helper nsrindexd process closes.
nsrmmgd	Manages tape library operations. Provides an RPC-based service that manages all jukebox operations on behalf of the nsrd service. The nsrd service starts only one instance of nsrmmgd on the NetWorker Server as needed.
nsrlogd	Supports the NetWorker audit log service, which is configured to run on the NetWorker Server by default.
nsrcpd	Starts automatically when a user accesses the Hosts Task window in the NetWorker Administration interface. Allows users to distribute and upgrade NetWorker and module software from a centralized software repository across a network.
nsrdispd	Handles RPC-based calls for the nsrd process, from remote third party processes.
nsrdisp_nwbg	Started by nsrdispd to handle NMC Server requests for information from the RAP and media databases on the NetWorker Server.
nsrlmc	Supports licensing requests. For the traditional licensing model, nsrlmc requests a license from the lgtolmd process. For the CLP/ELMS licensing model, nsrlmc requests capacity and update licenses from the ELMS server.
nsrvmwsd	Provides a web service to manage VMware VM backups that are part of the NetWorker VMware protection feature.
tomcat7 (Windows), tomcat (UNIX)	Tomcat web server instance for the NetWorker Authentication Service.
nsrexecd	Authenticates and processes the NetWorker Server remote execution requests and runs the save and savefs programs on the client.

NetWorker Storage Node

The following table summarizes the services that support the NetWorker Storage Node software.

Table 2. NetWorker Storage Node processesThe following table summarizes the services that support the NetWorker Storage Node software.
Process	Function
nsrmmd	Provides device support, generates mount requests, multiplexes save set data during a multi client backup, and de-multiplexes recover data. It writes the data sent by save to storage media. Forwards storage information to the nsrmmdbd process on the NetWorker Server, which the NetWorker Server adds to the media database.
nsrsnmd	Provides an RPC-based service to manage all the device operations that the nsrmmd process handles on behalf of the nsrd process on the NetWorker Server. Ensures that the necessary device operations are actually performed when needed by nsrd. Automatically run by nsrd as required. Only one nsrsnmd runs on each storage node that has configured and enabled devices.
nsrlcpd	Provides a uniform library interface to the NetWorker media management daemon, nsrmmgd. Manages the library subsystem media, slot, drive, and port resources providing control to move and access the resources within the library subsystems. One nsrlcpd starts for each configured tape library.
nsrexecd	Authenticates and processes the NetWorker Server remote execution requests and runs the save and savefs programs on the client.

NMC Server

The following table summarizes the processes that support the NMC Server software.

Table 3. NMC Server processesThe following table summarizes the processes that support the NMC Server software.
Process	Function
nsrexecd	Authenticates and processes the NetWorker Server remote execution requests and runs the save and savefs programs on the client.
gstd	Known as the Generic Services Toolkit (GST), controls other services that are provided by the NMC Server.
httpd	Starts the NMC Console GUI on the client through a web browser.
postgres	A database server that manages information pertaining to NMC Server management. For example, Console reports.
gstsnmptrapd	Monitors SNMP Traps on a managed Data Domain system. Provides the ability to report SNMP Trap events in the NMC Events task. Started only when SNMP Trap monitoring is configured for the Data Domain system.

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