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Re: Issue with index in OpenLDAP?

Hi Quanah and thank you again for your quick reply,

I did not deleted the *.bdb files, but I moved them in a backup folder.

My /db folder was empty, but the slapindex command failed because both "dn2id.bdb" and "id2entry.bdb" files was not present. I needed to add them in the /db folder in order to run the slapindex command.

Then, all index have been re-generated.

After the reindexation, the "cardnumber.bdb" file had the same size than before.

Could you confirm me that it's the best process to reindex an OpenLDAP?

Thank you,

Mathieu

2012/1/5 Quanah Gibson-Mount <quanah@zimbra.com>
Hi Mathieu,

It sounds like you didn't delete the cardnumber.bdb file before reindexing? That is what I'd have done.

Also, you previously had some questions about OpenLDAP tuning.  You may wish to read over <http://wiki.zimbra.com/wiki/OpenLDAP_Performance_Tuning>.  Some of the bits in there have Zimbra specific names, but they all apply directly to OpenLDAP and BDB in general.

--Quanah


--On Wednesday, January 04, 2012 2:46 PM +0100 "External Mathieu DEDECKER (CAMPUS)" <external.z02mdebe@oxylane.com> wrote:

I will read the man page in order to have more informations about the
command.

I tried to reindex all the index of the database with the slapindex
command, but I allways the same behaviour:

Request1: cardnumber=2098001010034  (less than 1sec)
Request2: cardnumber=2090389917486  (nearly 20 sec).

Other .bdb files size have been updated, but my "cardnumber.bdb" has
still the same size.

Regards,

Mathieu


2012/1/4 Quanah Gibson-Mount <quanah@zimbra.com>

Hi Mathieu,

If you read the slapindex man page, it is possibly to just recreate a
specific index file (for situations like this), rather than generating
all of them.

--Quanah


--On Wednesday, January 04, 2012 10:39 AM +0100 "External Mathieu
DEDECKER (CAMPUS)" <external.z02mdebe@oxylane.com> wrote:



Hello Quanah,

First I would like to thank you for your answer.

Indeed, I also think that the "cardnumber" index is somehow corrupted.
His size is to small in comparison to other indexes

We suppressed all existing index and Used slapindex to re-create them all.

It's undergoing.

I will keep you informed about the solution.

Best Regards,

Mathieu


2012/1/3 Quanah Gibson-Mount <quanah@zimbra.com>





--On Friday, December 23, 2011 11:27 AM +0100 "External Mathieu DEDECKER
(CAMPUS)" <external.z02mdebe@oxylane.com> wrote:


Hi @All,

We meet a performance problem with our OpenLDAP.

We think that we face a problem with the index of the database, and we
think that the problem can be resolve by tunning the config (but not
sure).

We would like to be sure that our configuration is correct, in order to
confirm if we are on a wrong track or not.

[Description]

We have an attribute (cardNumber) which is indexed.

When we request the indexed attribute (cardNumber) with an LDAP Client
(Ldapbrowser), we have either fast or very long response time.

For the long response time, the CPU of the server hits 100%.

For example:

Request1: cardnumber=2098001010034  (less than 1sec)
Request2: cardnumber=2090389917486  (nearly 20 sec).

By checking the hit ratio of the attribute, we can see that cache is
correctly used (97%).


It sounds like you added an index to cardnumber after there was already
data for cardnumber in your database, and didn't run slapindex for that
attribute.  Alternatively, your cardnumber.bdb file is corrupted.

--Quanah


--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration









--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration





--

Quanah Gibson-Mount
Sr. Member of Technical Staff
Zimbra, Inc
A Division of VMware, Inc.
--------------------
Zimbra ::  the leader in open source messaging and collaboration