OpenLDAP Performance suitable for an ISP environment?

["Amalio F. Nieto" <anieto@gmv.es>]

Hi all,

    I'm considering the posibility of installing OpenLDAP and Qmail as
part of the electronic mail architecture of an ISP. The ISP should
manage over 100.000 entries. Which is the performance should I expect
from OpenLDAP under these circumstances? Is it reasonable to use it in
this environment? I know the performance will not be like that offered
by commercial servers (iPlanet, for example) but, if the degradation is
not severe, it can be a serious alternative.

    If the answer to the above questions is positive, which should be
the recommended hardware platform and/or configuration requisites?

    Thanks,

    Amalio.

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