[Samba] Understanding the difference of lock/state/cache directory

[Marc Muehlfeld]

Hello,

in Samba 3 I had all TDBs on one place configured through "lock 
directory". Now I saw that Samba 4 split the location of the database 
files into lock/state/cache directory.


*Question 1*: The manpage says "state directory" is for persistent and 
"cache directory" for non-persistent data. Ok. That's clear. But what is 
stored in the "lock directory" and what is the reason why its content 
isn't placed in one of the other two directories?

*Question 2*: Why is the "winbindd_cache.tdb" stored in the state 
directory? Isn't it just a cache file?


Regards,
Marc









This is the content of the three directories after a fresh 4.0.9 member 
server installation:

lock directory:
==================
smbXsrv_tcon_global.tdb
smbXsrv_version_global.tdb
serverid.tdb
smb_krb5/krb5.conf.SAMDOM
dbwrap_watchers.tdb
notify_index.tdb
brlock.tdb
smbXsrv_open_global.tdb
gencache.tdb
smbXsrv_session_global.tdb
messages.tdb
printer_list.tdb
mutex.tdb
locking.tdb
notify.tdb
gencache_notrans.tdb


state directory:
===================
group_mapping.tdb
share_info.tdb
account_policy.tdb
winbindd_cache.tdb
winbindd_idmap.tdb
registry.tdb


cache directory:
===================
browse.dat
printing/{...printername1...}.tdb
printing/{...printername2...}.tdb
printing/{...printernameN...}.tdb
printing/printers.tdb
netsamlogon_cache.tdb