Dell NetWorker 19.9 Administration Guide

Clearing the NetWorker name resolution cache

NetWorker processes maintain an internal name resolution cache of recent DNS lookups.

The amount of time that NetWorker maintains a cached entry depends on the success of the lookup:

• Successful lookup—30 minutes.
• Failed lookup—5 minutes.

When a NetWorker operation requires a name resolution lookup, NetWorker checks the internal cache first. If NetWorker finds the name in the internal cache, then NetWorker does not consult the operating system.

Use the dbgcommand command on the NetWorker server to send a list of cached names to the daemon.raw file:

dbgcommand -p nsrd_pid PrintDnsCache=1

where nsrd_pid is the process id of the nsrd process.

Use the dbgcommand command on the NetWorker server to even the internal name resolution cache:

dbgcommand -p nsrd_pid FlushDnsCache

where nsrd_pid is the process id of the nsrd process.