How Backup Power Edition Works

Because Power Edition is a Backup server product, it shares a similar architecture with the Backup base product. This section provides an overview of how the Backup products perform backup and recover operations.
All Backup servers consist of services and programs that oversee the backup and recover processes and manage storage management client configurations, client file indexes, and the media database. The Backup client software includes a client service and user interface programs. The services and programs in Backup products communicate using the RPC (remote procedure call) protocol.

Backup Services and Programs

The services and programs in the Backup software coordinate the tasks associated with a backup or recover operation, record information about what was backed up, and track the media that contains the backed-up data.

Services and Programs on the Backup

Server

This section describes the services and programs on the Backup server, which contact the client for a backup and maintain the client file indexes and media database on the server.TABLE 2-1lists these services and programs.

Services and Programs on the Server

TABLE 2-1

Service/Program ansrd

Function
This service monitors an active saveor recoversession. This is an agent process spawned by nsrdin response to a saveor recoversession.
This service monitors the progress of individual save sets. This is an agent process invoked by the savegrp program.
This service checks the consistency of the client file index. It is invoked by nsrdwhenever the consistency of the client file index needs to be confirmed.
This service provides an RPC-based saveand recover service to Backup clients. This is the master Backup service.

asavegrp

nsrck

nsrd

Solstice Backup 5.1 Power Edition Release Supplement

*April 1998

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