Current approaches to ACL handling

Volker Lendecke Volker.Lendecke at SerNet.DE
Mon Oct 1 23:51:08 MDT 2012

On Tue, Oct 02, 2012 at 06:57:51AM +0200, Elia Pinto wrote:
> Hello, sorry for the top posting.
> Just to remember that a very old product AT&T "advanced server for
> unix" - a windows NT domain controller on Unix SVR4 - used a backing
> storage similar to a tdb for registering windows acl . Was in the 1998
> / 1999 and the operating system have not EA filesystem support at all.
> But in the some period also linux lacked the actual implementation,
> acl was introduced in REDHÁT 8, 2003 perhaps. Just an historical
> perspective, dunno if interesting, on what other implementation of
> windows on Unix had done in the past years. And i worked with them
> before samba.

We (SerNet) had to do a migration project from AS/U to
NetApp a few years ago, including ACL migration. We had to
allocate a solid weekend just for the ACLs, as AS/U would
take a few hundred milliseconds (!!) for each ACL to
retrieve from its database, and doing that twice in parallel
did not make it faster overall at all. We JUST made it until
Monday morning. Not everything was better in the past.


SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen, mailto:kontakt at

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