Re: (ITS#7462) olcPcache cannot be modified

[masarati@aero.polimi.it]

> Full_Name: Tio Teath
> Version: 2.4.33
> OS: Debian GNU Linux Wheezy
> URL: ftp://ftp.openldap.org/incoming/
> Submission from: (NULL) (178.172.239.4)
>
>
> I'm getting 'LDAP: error code 80 - cannot delete olcPcache' while I'm
> trying to
> perform olcPcache modification:
> dn: olcOverlay={0}pcache,olcDatabase={1}ldap,cn=config
> changetype: modify
> replace: olcPcache
> olcPcache: hdb 10000 4 500 100
> -
>
> I have to perform this action in case, I need to extend the number of
> pcacheAttrset directives.

Although the impossibility to modify olcPcache may be viewed as a bug, I
have the impression that a broad class of modifications e.g. to
olcPcacheTemplate are likely to invalidate an existing cache.

The fix should also consider the opportunity of thrashing the whole cache,
unless a clever means to only address entries associated with the
olcPcacheTemplate involved in the modification is found.

My 2c.  p.

-- 
Pierangelo Masarati
Associate Professor
Dipartimento di Ingegneria Aerospaziale
Politecnico di Milano