Re: DLZ's LDAP driver doesn't use multiple connections

On Tuesday 22 July 2008 15:53:49 Rob Butler wrote:
> Most likely your BIND is compiled as single threaded.  If that's the case,
> there is no need for more than one LDAP connection because there is only
> one thread running within BIND itself.
No, BIND is compiled with multithreading support enabled. I see BIND starting 
multiple threads, and multiple LDAP connections, but actually using only one.

>
> >From the LDAP page on the BIND-DLZ website
> > (http://bind-dlz.sourceforge.net/ldap_driver.html):
>
> The next piece on the line is the number "2".  This parameter is located at
> argv[1] and is required.  This tells BIND how many database connections we
> want the LDAP driver to use.  When BIND is built single threaded, this
> parameter is ignored BUT STILL REQUIRED!  The LDAP driver only uses one
> connection when built for single threaded operation.  When built for
> multithreaded operation, the driver will open the specified number of
> connections and ALWAYS keep them open.  The driver does NOT release
> connections during periods of inactivity and then re-open them when needed.
>  I considered this approach and decided against it.  A DNS server should
> always be ready to answer an onslaught of queries with all of its resources
> available.
>
> Rob
>
>
>
> ----- Original Message ----
>
> > From: Imri Zvik <[email protected]>
> > To: [email protected]
> > Sent: Tuesday, July 22, 2008 4:39:49 AM
> > Subject: [Bind-dlz-testers] DLZ's LDAP driver doesn't use multiple
> > connections
> >
> > Hi,
> >
> > I am trying to understand why I'm getting the worse performance using the
> > LDAP driver.
> >
> > It seems like the LDAP driver is always using one connection, even when
> > it is configured to use more.
> >
> > Even when I loadstress it with multiple clients (querypref running from
> > multiple machines), it is still utilizing only 1 connection.
> >
> > It seems that this is the bottleneck of the LDAP driver... Should it work
> > that way, or is this a bug?
> >
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