TDB Locations

List of Samba3 TDB files and their locations.

TDB File	API	Location	Info	Description
account_policy.tdb	dbwrap	state		Samba/NT account policy settings, includes password expiration settings.
autorid.tdb	dbwrap	state		Mappings of which domain is mapped to which range.
brlock.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST	Byte-range locking information.
connections.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST	A temporary cache for current connection information used to enforce max connections.
eventlog/*.tdb	tdb	state		Records of eventlog entries. In most circumstances this is just a cache of system logs.
g_lock.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST	Global locking information.
gencache.tdb	tdb	lock	TDB_CLEAR_IF_FIRST*	Generic caching database for dead WINS servers and trusted domain data.
gencache_notrans.tdb	tdb	lock	TDB_CLEAR_IF_FIRST
group_mapping.tdb	dbwrap	state		Mapping table from Windows groups/SID to UNIX groups.
idmap2.tdb	dbwrap	private
locking.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST
login_cache.tdb	tdb	cache		A temporary cache for login information, in particular bad password attempts.
messages.tdb	tdb_wrap	lock	TDB_CLEAR_IF_FIRST	Temporary storage of messages being processed by smbd.
mutex.tdb	tdb_wrap	lock
netsamlogon_cache.tdb	tdb	cache	TDB_CLEAR_IF_FIRST*	Caches user net_info_3 structure data from net_samlogon requests (as a domain member).
notify.tdb	tdb_wrap	lock	TDB_CLEAR_IF_FIRST
notify_onelevel.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST
ntdrivers.tdb	tdb	state		Removed in 3.6. Stores per-printer installed driver information.
ntforms.tdb	tdb	state		Removed in 3.6. Stores per-printer installed forms information.
ntprinters.tdb	tdb	state		Removed in 3.6. Stores the per-printer devmode configuration settings.
passdb.tdb	dbwrap	private		Exists only when the tdbsam passwd backend is used. This file stores the SambaSAMAccount information. Note: This file requires that user POSIX account information is available from either the /etc/passwd file, or from an alternative system source.
perfmon/data.tdb	tdb	state		Performance counter information.
perfmon/names.tdb	tdb	state		Performance counter information.
printer_list.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST
printing/*.tdb	tdb	cache		Cached output from lpq command created on a per-print-service basis.
registry.tdb	dbwrap	state		Read-only Samba database of a Windows registry skeleton that provides support for exporting various database tables via the winreg RPCs.
schannel_store.tdb	tdb_wrap	private	TDB_CLEAR_IF_FIRST	A confidential file, stored in the PRIVATE_DIR, containing crytographic connection information so that clients that have temporarily disconnected can reconnect without needing to renegotiate the connection setup process.
secrets.tdb	dbwrap	private		This file stores the Workgroup/Domain/Machine SID, the LDAP directory update password, and a further collection of critical environmental data that is necessary for Samba to operate correctly. This file contains very sensitive information that must be protected. It is stored in the PRIVATE_DIR directory.
serverid.tdb	tdb_wrap	lock	TDB_CLEAR_IF_FIRST
sessionid.tdb	dbwrap	lock	TDB_CLEAR_IF_FIRST	Temporary cache for miscellaneous session information and for utmp handling.
share_info.tdb	dbwrap	state		Stores per-share ACL information.
unexpected.tdb	tdb	lock	TDB_CLEAR_IF_FIRST	Removed in 3.6. Stores packets received for which no process is actively listening.
winbindd_cache.tdb	tdb	cache	TDB_CLEAR_IF_FIRST*	Cache of Identity information received from an NT4 domain or from ADS. Includes user lists, etc.
winbindd_idmap.tdb	tdb	state		Winbindd's local IDMAP database.
wins.tdb	tdb	state	TDB_CLEAR_IF_FIRST
xattr.tdb	dbwrap	state
torture.tdb	tdb	torture	Test TDB
test.tdb	tdb_wrap	torture	Test TDB
transtest.tdb	dbwrap	torture	Test TDB

TDB_CLEAR_IF_FIRST means that Samba clears the TDB on each first open (for example after a reboot).
* will be only cleaned (truncated) if file is corrupt