Re: dbcachenowsync

[Tonny Holdorf <tonny@e-hund.dk>]

That sounds very good. I am running Openldap 1.2.11 on a FreeBSD 4.0 Stable.
But  I actually don't know if it is using threads. I installed it directly
from the ports tree. Does it have to use threads in order to use the patch
and how can I check for it? I'm writting my application in Perl and I'm not
really strong on neither c nor FreeBSD.

> From: kunkee@neosoft.com (Randy Kunkee)
> Date: Mon, 11 Sep 2000 02:43:23 -0500 (CDT)
> To: Wanadoo <tonny@e-hund.dk>
> Cc: openldap-software@OpenLDAP.org
> Subject: Re: dbcachenowsync
> 
>> Hi
>> 
>> I'm am building an ldap based application where an administrator needs to do
>> updates to the ldap data from time to time. Some of the data consists of
>> pretty long textstrings that are indexed using the sub index. The Ldap
>> server therefore takes a long time to update an entry, sometimes several
>> minutes. In order to reduce that time I added the dbcachenowsync flag to the
>> slapd.conf. However, as I understand it, that means that the updated data is
>> kept in memory and not written to disk, and therefore lost in case the
>> server goes down. I therefore would like to know how I can force the new
>> data to be written to disk, say once a day.
>> 
>> Thanks in advance for any advice.
>> 
>> ../Tonny
>> 
>> 
> 
> I extended my OpenLDAP 1.2.11 adding a thread that gets started at the
> same time the daemon thread is started, and adds a flag to detect when
> changes are made.  Once a change is made, it waits until there are no
> active threads and then synchronizes the database.  It is hard-coded
> to check every 60 seconds.  This was a solution to solve the very
> problem you describe.  If you are using 1.2.11, I can put a patch
> file up somewhere.  If you are talking about 2.0, then it would have
> to be re-written some.  It seems to work very well, giving me the
> performance of dbcachenowsync, while flushing the database when the
> server is not too busy.  So the question is, what version are you
> using?
> 
> Randy
>