[PATCH] Use idmap cache for all pdb backends.

[Volker Lendecke]

On Sat, May 03, 2014 at 06:26:46AM +1200, Andrew Bartlett wrote:
> Sorry to be a pin, but not all callers go via the pdb_ functions.  The
> Python passdb API (for example) does not, it calls the backends directly
> via the methods pointers.
> 
> Also, can you explain a bit more why we should cache for the
> pdb_smbpasswd and pdb_tdbsam modules?  Caches naturally bring up issues
> of cache coherency, and we should only use them when looking up the
> result has a significant cost.  You imply that some situation using
> other than pdb_ldapsam calls LDAP, can you provide some more detail on
> that?

Performance. smbpasswd needs to scan a potentially large
file. And both smbpasswd and tdbsam need to traverse the
group_mapping.tdb for gid2sid calls, which can also be
large.

Volker

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