Netscape NETSCAPE DIRECTORY SERVER 6.1 - ADMINISTRATOR, Administrator'S Manual

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Creating and Maintaining Database Links
Chapter 3 Configuring Directory Databases 119
For the list of database link configuration attributes, refer to “Database Link
Configuration Attributes,” on page 109.
Detecting Errors During Normal Processing
You can help protect server performance by detecting errors during the normal
chaining operation between the database link and the remote server. The database
link has two attributes which work together to determine if the remote server is no
longer responding.
The first attribute,
nsMaxResponseDelay
, sets a maximum duration for an LDAP
operation to complete. If the operation takes more than the amount of time
specified in this attribute, the database link’s server suspects that the remote server
is no longer online.
Once the
nsMaxResponseDelay
period has been met, the database link pings the
remote server. During the ping, the database link issues another LDAP request, a
simple search request for an object that does not exist in the remote server. The
duration of the ping is set using the
nsMaxTestResponseDelay
.
nsBindRetryLimit
Number of times a database link attempts to bind to the
remote server. A value of zero (0) indicates that the database
link will try to bind only once. The default value is
3
attempts.
nsConnectionLife
Connection lifetime, in seconds. You can keep connections
between the database link and the remote server open for an
unspecified time, or you can close them after a specific period
of time.
It is faster to keep the connections open, but it uses more
resources. For example, if you are using a dial-up connection
you may want to limit the connection time.
A value of 0 indicates there is no limit. By default, the value is
set to 0. When the value is 0 and you provide a list of failover
servers in the
nsFarmServerURL
attribute, the “main”
server is never contacted after failover to the alternate server.
The default value is
0
seconds.
nsBindTimeout
Amount of time, in seconds, before the bind attempt times
out. The default value is
15
seconds.
nsAbandonedSearchCheckInterval
Number of seconds that pass before the server checks for
abandoned operations. The default value is
2
seconds.
Table 3-5
Database Link Connection Management Attributes (Continued)
Attribute Name Description