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2.5. Lock Files
Each Directory Server instance contains a
/var/lock/dirsrv/slapd-instance_name directory for storing lock-related files. The following is a sample listing of the locks directory contents.
Example 2.4. Lock Directory Contents
exports/ imports/ server/
The lock mechanisms control how many copies of the Directory Server process can be running at one. For example, if there is an import job, then a lock is placed in the
imports/ directory to prevent any other ns-slapd (normal), ldif2db (another import), or db2ldif (export) operations from running. If the server is running as normal, there is a lock in the server/ directory, which prevents import operations (but not export operations), while if there is an export operation, the lock in the exports/ directory allows normal server operations but prevents import operations.
The number of available locks can affect overall Directory Server performance. The number of locks is set in the
nsslapd-db-locks attribute. Tuning that attribute value is described in the Performance Tuning Guide.
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