The
file
is used by the
nscd(8)
daemon and is read on its startup.
Its syntax is mostly similar to the
nscd.conf
syntax in
Linux
and
Solaris
It has some differences, though [em] see them below.
Each line specifies either an attribute and a
value
or an attribute, a
cachename
and a
value
Usual cachenames are
``passwd
''
``groups
''
``hosts
''
``services
''
``protocols
''
and
``rpc
''
You can also use any other
cachename
(for example, if some third-party
application uses nsswitch).
threads [value
]
Number of threads, which would listen for connections and process requests.
The minimum is 1.
The default value is 8.
enable-cache [cachename [yes | no
]
]
Enables or disables the cache for specified
cachename
positive-time-to-live [cachename [value
]
]
Sets the TTL (time-to-live) for the specified cache in seconds.
Larger values can increase system's performance, but they also can affect
the cache coherence.
The default value is 3600.
positive-policy [cachename [fifo | lru | lfu
]
]
The policy that is applied to erase some of the cache elements, when the
size limit of the given
cachename
is exceeded.
Possible policies are:
fifo
(first-in-first-out),
lru
(least-recently-used), and
lfu
(least-frequently-used).
The default policy is
lru
negative-time-to-live [cachename [value
]
]
The TTL of the negative cached elements in seconds.
The larger values can significantly increase system performance in some
environments (when dealing with files with UIDs, which are not in system
databases, for example).
This number should be kept low to avoid the cache coherence problems.
The default value is 60.
negative-policy [cachename [fifo | lru | lfu
]
]
The same as the positive-policy, but this one is applied to the negative
elements of the given
cachename
The default policy is fifo.
suggested-size [cachename [value
]
]
This is the internal hash table size.
The value should be a prime number for optimum performance.
You should only change this value when the number of cached elements is
significantly (in 5-10 times) greater then the default hash table size (255).
keep-hot-count [cachename [value
]
]
The size limit of the cache with the given
cachename
When it is exceeded, the policy will be applied.
The default value is 2048.
perform-actual-lookups [cachename [yes | no
]
]
If enabled, the
nscd(8)
does not simply receive and cache the NSS-requests results, but performs
all the lookups by itself and only returns the responses.
If this feature is enabled, then for the given
cachenamenscd(8)
will act similarly to the NSCD.
NOTE
this feature is currently experimental [em] it supports only
``passwd
''
``groups
''
and
``services
''
cachenames.
NOTES
You can use the
`#'
symbol at the beginning of the line for comments.
