idmap_tdb 8 Samba System Administration tools 3.6 idmap_tdb Samba's idmap_tdb Backend for Winbind The idmap_tdb plugin is the default backend used by winbindd for storing SID/uid/gid mapping tables. In contrast to read only backends like idmap_rid, it is an allocating backend: This means that it needs to allocate new user and group IDs in order to create new mappings. range = low - high Defines the available matching uid and gid range for which the backend is authoritative. If the parameter is absent, Winbind fails over to use the "idmap uid" and "idmap gid" options from smb.conf. This example shows how tdb is used as a the default idmap backend. It configures the idmap range through the global options for all domains encountered. This same range is used for uid/gid allocation. [global] # "backend = tdb" is redundant here since it is the default idmap config * : backend = tdb idmap config * : range = 1000000-2000000 This (rather theoretical) example shows how tdb can be used as the allocating backend while ldap is the default backend used to store the mappings. It adds an explicit configuration for some domain DOM1, that uses the tdb idmap backend. Note that the same range as the default uid/gid range is used, since the allocator has to serve both the default backend and the explicitly configured domain DOM1. [global] idmap config * : backend = ldap idmap config * : range = 1000000-2000000 # use a different uid/gid allocator: idmap config DOM1 : backend = tdb idmap config DOM1 : range = 1000000-2000000 The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed.