[Samba] Request to update slapd.conf and OpenLDAP info forSamba-Guide/happy.html

[John H Terpstra]

On Wednesday 02 March 2005 08:26, Gavin Henry wrote:
> <quote who="John H Terpstra">
>
> > Gavin,
> >
> > The book "Samba-3 by Example" was written at the time Samba-3.0.2 was
> > just released. At that time (February 2004) the version of OpenLDAP that
> > were shipping on SuSE Linux Enterprise Server and on Red Hat Enterprise
> > Linux used
> > ldbm.
> >
> > I agree entirely that this needs to be updated, in fact, it is necessary
> > also
> > to update all references to the smbldap-tools as well as many other
> > subtle factors that have changed in Samba between Samba-3.0.2 and 3.0.12
> > (the soon
> > to be released version).
> >
> > I will update the entire book at the first opportunity I get. If you wish
> > to
> > submit patches I would be most appreciative.
>
> Understood. I'll hopefully get something to you. Via bugzilla etc?

Yes please - via bugzilla!

Thanks.

- John T.

>
> > Cheers,
> > John T.
> >
> > On Wednesday 02 March 2005 03:24, Gavin Henry wrote:
> >> Dear Team,
> >>
> >> The OpenLDAP stuff on this page:
> >>
> >> http://us4.samba.org/samba/docs/man/Samba-Guide/happy.html
> >>
> >> is not the preferred backend, i.e. ldbm, it really, really needs to be
> >> bdb.
> >>
> >> See:
> >>
> >> http://www.openldap.org/faq/index.cgi?_highlightWords=bdb%20ldbm&file=10
> >>85
> >>
> >> "ldbm uses a neutral storage interface which in principle could wrap
> >> dbm,
> >> ndbm, gdbm or sleepycat as underlying storage; however, only Sleepycat
> >> is
> >> considered a reliable choice, so bdb offers more interesting features
> >> (ACID). Eventually it will disappear."
> >>
> >> And:
> >>
> >> http://www.openldap.org/faq/data/cache/756.html
> >>
> >> "With back-ldbm, there is no fine-grain database locking. This means
> >> write
> >> operations are serialized. And while multiple read operations may be
> >> performed concurrently, they cannot be performed concurrently with any
> >> write operation. Additionally, LDBM databases cannot be accessed by only
> >> one program at a time (generally at the file level). (While one may be
> >> able to bypass the locking mechanism, you will likely corrupt the
> >> database
> >> (and/or obtain bogus information).)
> >>
> >> With back-bdb, databases are locked on a page level, which means that
> >> multiple threads (and processes) can operate on the databases
> >> concurrently. In OpenLDAP 2.1.4 we lifted the restriction against using
> >> the slap tools while slapd is running on back-bdb. You can perform
> >> online
> >> backups using slapcat or BDB's db_dumputility without interrupting your
> >> LDAP service. You still must not use slapadd or slapindex while slapd is
> >> running (due to application-level caching in slapd(8))."
> >>
> >>
> >> Point to highlight for disaster recovery:
> >>
> >> "You can perform online backups using slapcat or BDB's db_dumputility
> >> without interrupting your LDAP service."
> >>
> >> Therefore,
> >> can we update it for this and all the configuration that goes with using
> >> a
> >> bdb backend?
> >>
> >> I feel we are not doing the Samba community justice, if we are telling
> >> them to use lbdm.
> >>
> >> Thanks.
> >>
> >> --
> >> Kind Regards,
> >>
> >> Gavin Henry.
> >> Managing Director.
> >>
> >> T +44 (0) 1224 279484
> >> M +44 (0) 7930 323266
> >> F +44 (0) 1224 742001
> >> E ghenry at suretecsystems.com
> >>
> >> Open Source. Open Solutions(tm).
> >>
> >> http://www.suretecsystems.com/
> >
> > --
> > John H Terpstra
> > Samba-Team Member
> > Phone: +1 (650) 580-8668
> >
> > Author:
> > The Official Samba-3 HOWTO & Reference Guide, ISBN: 0131453556
> > Samba-3 by Example, ISBN: 0131472216
> > Hardening Linux, ISBN: 0072254971
> > Other books in production.
> > --
> > To unsubscribe from this list go to the following URL and read the
> > instructions:  https://lists.samba.org/mailman/listinfo/samba

-- 
John H Terpstra
Samba-Team Member
Phone: +1 (650) 580-8668

Author:
The Official Samba-3 HOWTO & Reference Guide, ISBN: 0131453556
Samba-3 by Example, ISBN: 0131472216
Hardening Linux, ISBN: 0072254971
Other books in production.