dscacheutil(1) General Commands Manual dscacheutil(1)
dscacheutil – gather information, statistics and initiate queries to the
Directory Service cache.
dscacheutil -q category [-a key value]
dscacheutil -cachedump [-buckets] [-entries [category]]
dscacheutil does various operations against the Directory Service cache
including gathering statistics, initiating lookups, inspection, cache
flush, etc. This tool replaces most of the functionality of the lookupd
tool previously available in the OS.
A list of flags and their descriptions:
-h Lists the options for calling dscacheutil
Initiate a query using standard calls. These calls will either
return results from the cache or go fetch live data and place them
in the cache. By default if no specific query is requested via -a
then all results within that category will be returned.
-a key value
Optional flag to -q for a specific key with a value.
Dumps an overview of the cache by default. Additional flags will
provide more detailed information.
Used in conjunction with -cachedump to also print hash bucket usage
of the current cache.
Used in conjunction with -cachedump to dump detailed information
about cache entries. An optional category can be supplied to only
see types of interest. Dumping 'host' entries can only be done by
Prints current configuration information, such as the search policy
from Directory Service and cache parameters.
Flushes the entire cache. This should only be used in extreme
cases. Validation information is used within the cache along with
other techniques to ensure the OS has valid information available
Prints statistics from the cache including an overview and detailed
call statistics. Some calls are not cached but are derived from
other calls internally. Cache hits and cache misses may not always
be equal to external calls. For example getaddrinfo is actually a
combination of gethostbyname with other calls internally to the
cache to maximize cache hit rate.
Available categories and associated keys:
group name or gid
host name or ip_address (used for both IPv6 and IPv4)
protocol name or number
rpc name or number
service name or port
user name or uid
Lookup a user:
% dscacheutil -q user -a name jdoe
gecos: John Doe
Lookup all users:
% dscacheutil -q user
Dump cache overview:
% dscacheutil -cachedump
Dump cache details with user entries:
% dscacheutil -cachedump -entries user
Darwin January 14, 2007 Darwin