Managing Backup Policies (Classes)
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Setting the Preprocess Interval for Auto Discovery
The preprocess interval applies only to auto-discover mode and specifies how
often preprocessing occurs. When a schedule is due and auto discovery is used,
NetBackup checks whether the previous preprocessing session occurred within
the preprocess interval:
• If yes, NetBackup does not run preprocessing on the client.
• If no, NetBackup runs preprocessing on the client and makes required
changes to the streams.
If necessary, you can change the interval by using the
bpconfig
command.
The default is four hours and is a good value for most sites that run daily
backups. If the interval is too long or too short, the following can occur:
• Too long an interval can result in new streams not being added soon
enough and backups can be missed. For example, assume the preprocess
interval is set to four hours and a schedule has a frequency of less than four
hours. Here, it is possible for a new stream to be omitted from the next
backup because the preprocessing interval has not expired when the backup
is due.
• Too short an interval can cause preprocessing to occur often enough to
increase backup time to an unacceptable level. A short interval is most
likely to be a problem when there are a large number of clients that the
server must contact for preprocessing.
The form of the
bpconfig
command to use for changing the interval is:
install_path
\NetBackup\bin\admincmd\bpconfig
[
-prep
hours]
For example:
install_path
\NetBackup\bin\admincmd\bpconfig -prep 12
If you specify 0, the default of 4 hours is used.
The following example sets the preprocess interval to 12 hours. You can
determine the current interval by using the
bpconfig
command with the
-L
option:
bpconfig -L
(output of the above command)
Mail Admin: *NULL*
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT
