NetVault 12.1 - Administration Guide

Generic cleaning settings

On the Generic Cleaning screen, the following settings are available.

NetVault Backup processes

About NetVault Backup processes

NetVault Backup includes several static and dynamic processes that run on the server and client machines.

The static processes remain active while the NetVault Backup Service is running. These processes are assigned fixed single-digit process ID numbers and generally use the same amount of system resources during their life.

The dynamic processes are initiated and destroyed according to the current NetVault Backup activities. These processes are assigned changing ID numbers and use varying amounts of system resources during their life.

On Windows-based machines, you can view the NetVault Backup processes from the Task Manager. On Linux- and UNIX-based platforms, you can use the following command to view these processes:

ps -ef | grep nv

Process description

This section briefly describes the functions of various NetVault Backup processes that run on the server and client machines. NetVault Backup includes the following processes:

nvpmgr runs on all NetVault Backup Server and Client machines. This process manages all other NetVault Backup processes. nvpmgr creates and destroys the transient processes. The Process Manager also manages the allocation of shared memory area for the process table and trace buffers. Although the Process Manager is assigned a static process ID, this process is seen as a Dynamic process because it requires varying levels of system resources.

Process Type: Dynamic

Process ID: 1

nvcmgr supports the inter-process messaging system. This process runs on all NetVault Backup Server and Client machines. On UNIX and Linux OS, the Communications Manager runs as a process. On Windows, this process runs as a thread within the nvpmgr process. nvcmgr handles communication between various NetVault Backup processes on a local machine.

Process Type: Static

Process ID: 2

nvnmgr supports the inter-process messaging system. This process runs on all NetVault Backup Server and Client machines. On UNIX and Linux OS, the Network Manager runs as a process. On Windows, this process runs as a thread within the nvpmgr process. nvnmgr transmits the inter-process messages to remote clients. The Network Manager also broadcasts availability messages that help determine the status of the clients.

Process Type: Static

Process ID: 3

nvmedmgr runs on the NetVault Backup Server.

This process manages the Media Database, which contains information about the media contents and online backup savesets. The Media Manager also stores and manages the device configuration details. It manages the backup devices through the Device Manager processes. The Media Manager issues high-level instructions for loading and unloading media; the Device Manager processes carry out these instructions. The Media Manager controls the selection of device and media for a job according to the media requests submitted by the Job Manager.

Process Type: Static

Process ID: 4

nvsched runs on the NetVault Backup Server. This process manages the job schedules and queues. It also manages the Scheduler Database. The Schedule Manager initiates the Job Manager to start a job instance, and schedules the next instance for recurring jobs; the Job Manager runs the job. This process also updates the Job Status page and provides job scheduling data to the Reporting utility.

Process Type: Static

Process ID: 5

nvlogdaemon runs on the NetVault Backup Server. This process starts along with the NetVault Backup Service.

The Logging Daemon manages the log messages generated by various NetVault Backup processes and writes these messages to the NetVault Database. Log messages contain information that can be used for diagnosing and troubleshooting problems. The Logging Daemon also performs periodic disk space checks, and issues alert messages when the space usage level reaches the Warning or Critical Threshold. These checks apply to the NetVault Backup Home, Database, Logs, and Reports directories.

Process Type: Static

Process ID: 7

nvavp runs on the NetVault Backup Server. This process tracks and controls user activities. nvavp validates each user request, and depending on the assigned privileges, allows or denies a request.

Process Type: Static

Process ID: 8

nvstatsmngr runs on all NetVault Backup Server and Client machines. This process collects drive statistics, event history, media requests, server capacity, and transfer information for the reporting utility.

Process Type: Static

Process ID: 9

nvrepdbmngr runs on the NetVault Backup Server. This process manages the Reports Database.

The Reports Database Manager polls the Statistics Manager at periodic intervals to fetch the collected data, and writes the data to the Reports Database. nvrepdbmng also transmits the information in the Reports Database to the reporting utility and performs periodic purging of the Reports Database.

Process Type: Static

Process ID: 10

nvwsrequesthandler runs on the NetVault Backup Server. This process runs the Web Service used by the WebUI.

Process Type: Static

Process ID: 14

nvconsolesvc runs on all NetVault Backup Server and Client machines. NetVault Backup uses this process to get or set configuration properties on remote client machines.

Process Type: Static

Process ID: 15

nvdeploymentmgr runs on the NetVault Backup Server. This process manages the push installation tasks.

You can use the push installation method to perform the following tasks:

This process stores all deployment related information in the netvault_machines database. The Deployment Manager creates one or more deployment worker processes (nvdeploymentwkr) to manage the installation processes for the remote machines.

Process Type: Static

Process ID: 17

nvdevmgr runs on the NetVault Backup Server and Clients that have locally attached devices. This process performs media reads and writes, and handles loading and unloading of media. NetVault Backup creates one instance of the Device Manager process for each configured drive. In SAN environment, an instance runs for each NetVault Backup Client that shares the device.

Process Type: Static (runs while the device is available)

Process ID: Varies

nvndmpdevmgr runs on the NetVault Backup Server. This process performs media reads and writes, and handles loading and unloading of media for NDMP-based filers. NetVault Backup creates one instance of the NDMP Device Manager process for each configured drive.

Process Type: Static (runs while the device is available)

Process ID: Varies

nvchgmgr controls the Robotic Arm Changer. This process runs on the NetVault Backup Server and Clients to which the robotic arm changer is connected. NetVault Backup creates one instance for each arm changer.

Process Type: Static (runs while the device is available)

Process ID: Varies

nvchgmgr runs on the NetVault Backup Server. This process controls the Robotic Arm Changer for devices attached to NDMP-based filers. NetVault Backup creates one instance for each arm changer.

Process Type: Static (runs while the device is available)

Process ID: Varies

nvrascontroller manages the disk-based storage devices. This process runs on the NetVault Backup Server. NetVault Backup creates one instance of the RAS Device Controller process for each configured device.

Process Type: Static (runs while the device is available)

Process ID: Varies

nvjobmgr runs on the NetVault Backup Server and manages the execution of a job.

The Schedule Manager starts the Job Manager. A single instance of Job Manager runs for each job until the completion of the job. The Job Manager reports on the job run status and exit status. This process coordinates with the Data Plug-in and fetches the required information from the NetVault Backup Server. It is also responsible for sending drive and media requests to the Media Manager process.

Process Type: Dynamic

Process ID: Varies

nvduplicate performs backup duplication. This process runs on the NetVault Backup machine on which the Duplication phase is run.

Process Type: Dynamic

Process ID: None

nvverify performs backup verification. This process verifies the stream length written to the media and ensures that no blocks were dropped during backup. nvverify runs on the NetVault Backup machine on which the Verification phase is run.

Process Type: Dynamic

Process ID: None

nvplgscript executes the pre- and post-scripts for a job. This process runs on the target client when you select the pre- and post-script execution options for a job.

Process Type: Dynamic

Process ID: None

nvwsworker is the Web Service worker process. The nvwsrequesthandler process starts the worker processes. Teams of these processes are used to improve performance. When a large amount of content is served to the WebUI, ten or more processes can run on the NetVault Backup Server. These processes continue running for a short time after the content is served.

Process Type: Dynamic

Process ID: None