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Services and Programs on the Backup
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Client
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The nsrd service calls upon the Backup client service, nsrexecd, and several
programs on the client when a scheduled or on-demand backup request is received.
A temporary server agent service, ansrd, starts on the Backup server to monitor the
progress of the backup session. TABLE 2-2describes the services and programs on the
Backup client.
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Services and Programs on the Client
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TABLE 2-2
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service/ProgramFunction
nsrexecdThis service authenticates the Backup server's remote
execution request and executes the saveand savefs
commands on the client.
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recover
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This program browses the Backup server's client file
index and restores the specified file to primary disk
storage.
This program sends specified files in a multiplexed data
stream to the Backup server for backup to media by
nsrmmdand entry in the client file indexes and media
database by nsrindexd.
This program sends information about the save sets to
back up for the client and identifies save set data modified
since the previous level save.
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save
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savefs
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When you configure a backup groupon the Backup server, you schedule a start time
for the backup group. The nsrdservice starts the server's savegrpprogram for the
backup group at the scheduled time.
The savegrpprogram queries the client resources configured on the Backup server
to determine:
*Which clients configured on the server are members of the scheduled group
*What level of backup (save) to perform
*When the most recent backup of the group occurred
If any of this information is not available on the Backup server, the savegrp
programsends a request (sometimes called a probe) to the nsrexecdclient service
to run savefson each client assigned to the backup group to gather the necessary
details.
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Solstice Backup 5.1 Power Edition Release Supplement
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*April 1998
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14
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