Re: Textual LDIF backup strategies for busy LDAP clusters

[Quanah Gibson-Mount <quanah@zimbra.com>]

--On Monday, June 28, 2010 11:42 AM +1000 Nick Urbanik 
<nick.urbanik@optusnet.com.au> wrote:

> Dear Quanah,
>
> Thanks again for taking the time to write a detailed and helpful
> reply.
>
> On 25/06/10 10:41 -0700, Quanah Gibson-Mount wrote:
> > --On Friday, June 25, 2010 9:58 AM +1000 Nick Urbanik
> > <nick.urbanik@optusnet.com.au> wrote:
> > > On 23/06/10 21:46 -0700, Quanah Gibson-Mount wrote:
> > > > --On Thursday, June 24, 2010 12:19 PM +1000 Nick Urbanik
> > > > <nick.urbanik@optusnet.com.au> wrote:
> > > > auditlog is not appropriate.
> > >
> > > Please can you explain why this is so?
> >
> > Auditlog is a poorly written overlay that hopefully will be deleted
> > in the future.  It kills perf, and in general is not recommended for
> > use. If you want a record of changes, I suggest you look at the
> > accesslog overlay.
>
> 1. Can we use an LDIF backend with the auditlog overlay?

Why are you stuck on auditlog?  As I said, don't use it.

> 2. Has anyone written a program to convert the auditlog data to an
>     LDIF format that can be applied with ldapmodify?

No idea.  As I said, it's not really a usable piece of software.

> > One of the advantages of syncrepl (Although I use and prefer
> > delta-syncrepl, since syncrepl has not proven reliable in my
> > experience)
>
> We are avoiding delta-syncrepl because, for reliability, we want to
> use mirror-mode, and at
> http://www.openldap.org/doc/admin24/replication.html#MirrorMode%20replica
> tion
> under section 18.2.3.2. Arguments against MirrorMode is written:
>
> "Delta-Syncrepl is not yet supported"
>
> 3. Does this mean that we are aiming for a less reliable replication
>     with syncrepl that with delta-syncrepl?

You can still enable the accesslog overlay regardless of what replication 
mechanism is used between the mirrors.  As for the reliability, as I said, 
in my experience, delta-syncrepl has been reliable.

> 4. Is there any prospect of delta-syncrepl being supported with
>     mirror-mode?

Yes, that's a future request.


--Quanah

--

Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
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