Re: (ITS#3979) glue mixtures can confuse slapadd

[Howard Chu <hyc@symas.com>]

Pierangelo Masarati wrote:
> Howard Chu wrote:
>
> > Certainly there is no prescribed order, but we assume that a given 
> > implementation always uses the same order. Otherwise most of our test 
> > comparisons in the test suite are broken, and features like 
> > PagedResults cannot be implemented.
>
> Back-meta, which is the reason that "async" appeared so early in 
> slapo-glue(5), is a clear violation of the above...  For that reason, 
> in most of the back-meta tests, I need to use -S "" to ensure the same 
> ordering in the results; as for the sizelimit, that's a completely 
> different issue.  I think you're absolutely right for a slapo-glue 
> implementation that deals with data that is internally stored.  In 
> that case, the possibility to guarantee that the order is preserved in 
> the implementation may be of value (can we change that order when 
> changing versions?  I think it already occurred at least once for 
> backglue).  But when dealing with data stored outside (as happens with 
> the proxy backends) I wouldn't count much on the ordering.  Even when 
> plain back-ldap is used to proxy non-OpenLDAP software I think there's 
> no way we can guarantee for the ordering of data returned from other 
> vendor's implementations.
Right.

For now, I've dropped any mention of async from the subordinate 
description in slapd.conf(5).

--
 -- Howard Chu
 Chief Architect, Symas Corp.  http://www.symas.com
 Director, Highland Sun        http://highlandsun.com/hyc
 OpenLDAP Core Team            http://www.openldap.org/project/