dynamic groups
by Michał Szulczyński
Hello,
My name is Michał Szulczyński, and I'm a student at Warszawska Wyższa
Szkoła Informatyki in Poland. I'm on a practice at the company where
Aleksander Adamowski works.
As he said, I will try to implement dynamic list member 'caching'. The
general idea is to "materialize" the member attribute of the dynamic
group using existing static attribute values infrastructure (including
indexes) and update them automatically when there is a
add/modify/modrdn/delete operation on an object that matches the dynlist
memberURL filter.
The operation of dynlist overlay would be identical as it is now without
specifying an additional dynlist configuration option.
The plan is to, depending on the additional, optional dynlist-attrset
configuration parameter, grab the dynamic list entries for that dynlist
configuration from the database, and put them into a memory-resident
list (which would hold all the dynamic groups that we are interested in,
ie. the ones with the additional configuration option set).
When there is a add/mod/modrdn/delete operation on any entry, we would
check this list for a matching dynlist filter, and add/modify/delete the
member attribute of the dynamic list for that entry. Much like a static
group, but with automated addition/deletion to/from it, effectively
making it a dynamic group. Manual updates to the member attribute would
be prevented and would raise an error.
First, in addition to dynlist_info_t we would need to hold the pointer
to our memory-resident dynamic group list per dynlist overlay instance.
That's for speed optimization, since searching for all dynamic lists on
each update operation would have a huge performance impact.
As we can only hold only one backend-specific config data in
Operation->o_bd->bd_info->on_bi.bi_private, we wold need to hold both
pointers (dynlist_info_t and the pointer to our list) in an additional
struct, and store that. But this method would mean changing much of the
existing codebase, and I don't know if that would be good.
If there would be another place where we could store the pointer to the
dynamic group list, that would be better.
Second, I would like to know if there is a function to test whether one
DN is contained in another DN (i.e. one DN is a descendant to another
DN).
I need this to compare the base DN of the dynamic group, and the
added/modified/deleted/modrdn'ed entry (eg: if the entry DN
<uid=test,l=City,ou=People,o=MyOrg> is in the dynamic group's member
URL's base DN <ou=People,o=MyOrg>). I think that comparing the
normalized DN's stringwise backwards from the strings' end would work,
but I'm not sure.
Third:
* can we do an add-or-replace with BackendDB->be_modify
* when doing a LDAP_MOD_DELETE on a single attribute's value can we
ignore a case where that attribute value does not exist in the entry (so
we can avoid checking for its presence and save an unnecessary read
operation)?
--
Michał Szulczyński
Praktykant
Altkom Akademia S.A. http://www.altkom.pl
Warszawa, ul. Chłodna 51
Sąd Rejonowy dla m.st. Warszawy w Warszawie, XII Wydział Gospodarczy Krajowego Rejestru Sądowego,
KRS: 0000120139, NIP 118-00-08-391, Kapitał zakładowy: 1000 000 PLN. Adres rejestrowy Firmy - ul. Stawki 2, 00-193 Warszawa.
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15 years, 8 months
dynamic group caching for member -> dynlist search - new implementor
by Aleksander Adamowski
Hello!
Regarding the discussion about implementing dynamic group caching so
that we can search on member for dynamic groups (not only static, like
currently), let me introduce Michal Szulczynski
(michal.szulczynski(a)altkom.pl).
He's working on an implementation and I'm his mentor.
He works on CVS HEAD, and will most probably have several questions
about OpenLDAP codebase, since the only available development
documentation are sparse comments in the source...
BTW, the current HEAD version was segfaulting at startup for us, but the
simple fix for dynlist.c (see attached patch) has remedied it.
--
Best Regards,
Aleksander Adamowski
GG#: 274614
ICQ UIN: 19780575
http://olo.org.pl
--
Aleksander Adamowski
Administrator systemów korporacyjnych; Instruktor
Altkom Akademia S.A. http://www.altkom.pl
Warszawa, ul. Chłodna 51
kom. 0-601-318-080
Sąd Rejonowy dla m.st. Warszawy w Warszawie, XII Wydział Gospodarczy Krajowego Rejestru Sądowego,
KRS: 0000120139, NIP 118-00-08-391, Kapitał zakładowy: 1000 000 PLN. Adres rejestrowy Firmy - ul. Stawki 2, 00-193 Warszawa.
Niniejsza wiadomość zawiera informacje zastrzeżone i stanowiące tajemnicę przedsiębiorstwa firmy Altkom Akademia S.A.
Ujawnianie tych informacji osobom trzecim lub nieuprawnione wykorzystanie ich do własnych celów jest zabronione.
Jeżeli otrzymaliście Państwo niniejszą wiadomość omyłkowo, prosimy o niezwłoczne skontaktowanie się z nadawcą oraz usunięcie wszelkich kopii niniejszej wiadomości.
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Unauthorized use or disclosure of this information to any third party is prohibited.
If you received this message by mistake, please contact the sender immediately and delete all copies of this message.
15 years, 9 months
LDAP_REL_ENG_2_4
by Quanah Gibson-Mount
OpenLDAP Release Engineering 2.4 has been sync'd with HEAD. Please check
it out and test that builds and functionality work as expected. I've
tested so far on MAC OS X x86.
Thanks!
--Quanah
--
Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
Zimbra :: the leader in open source messaging and collaboration
15 years, 9 months
Performance issue with In-Memory BDB
by Suhel Momin
Hi,
I have made changes such that backend BDB ( ver 4.5 ) resides in memory
instead of on disk . This is with default slapd configuration.
I was hoping to have a better performance with this. But what I now see is
that do_add takes much more time then what it use to take when BDB was
on-Disk. Indexing is done on objectclass in both the cases.
Any pointers on why this could be an issue?
Regards,
Suhel
15 years, 9 months
Reminder: 10 Year Anniversary next year
by Gavin Henry
Dear All,
Just a reminder for next year for us to think of something grand to do! ;-)
Gavin.
--
Kind Regards,
Gavin Henry.
Managing Director.
T +44 (0) 1224 279484
M +44 (0) 7930 323266
F +44 (0) 1224 824887
E ghenry(a)suretecsystems.com
Open Source. Open Solutions(tm).
http://www.suretecsystems.com/
15 years, 9 months
Is contextCSN SINGLE-VALUE?
by Pierangelo Masarati
I'm seeing it multiple-valued in some bulk testing I'm doing; does it
make any sense? Its specification, in schema_prep.c, doesn't explicitly
set the SINGLE-VALUE constraint.
p.
Ing. Pierangelo Masarati
OpenLDAP Core Team
SysNet s.r.l.
via Dossi, 8 - 27100 Pavia - ITALIA
http://www.sys-net.it
---------------------------------------
Office: +39 02 23998309
Mobile: +39 333 4963172
Email: pierangelo.masarati(a)sys-net.it
---------------------------------------
15 years, 9 months
Re: commit: ldap/servers/slapd filterentry.c
by Pierangelo Masarati
hyc(a)OpenLDAP.org wrote:
> Log Message:
> test_filter() should use ordered_value_match()
Shouldn't that go almost everywhere? I'm not sure about component
match, which is probably broken, but MRA should be affected as well.
Only explicit entryDN and hasSubordinates tests should be unaffected.
p.
Ing. Pierangelo Masarati
OpenLDAP Core Team
SysNet s.r.l.
via Dossi, 8 - 27100 Pavia - ITALIA
http://www.sys-net.it
---------------------------------------
Office: +39 02 23998309
Mobile: +39 333 4963172
Email: pierangelo.masarati(a)sys-net.it
---------------------------------------
15 years, 9 months
Re: commit: ldap/servers/slapd bconfig.c ldapsync.c slapadd.c syncrepl.c
by Howard Chu
ando(a)OpenLDAP.org wrote:
> Update of /repo/OpenLDAP/pkg/ldap/servers/slapd
>
> Modified Files:
> bconfig.c 1.295 -> 1.296
> ldapsync.c 1.43 -> 1.44
> slapadd.c 1.45 -> 1.46
> syncrepl.c 1.346 -> 1.347
>
> Log Message:
> improve previous commit; fix ITS#5108 by letting both SID and RID be 0..4095,
> input/output in decimal, but consistently handled in hexadecimals within CSN
Expanding the range of the RID is not necessary. The two numbers serve
completely different purposes. There's no need to incur the doc impact of
making this change.
--
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
15 years, 9 months
