samba - Jan 2005 - Typo in Samba-3 By Example Book, Chapter 5

Kelly,

I have already replied to the list that this is a typo. In my reply I have 
provided guidelines for determining how many BDCs you need.

In short, Microsoft recommend at lease one NT4 BDC per 150 clients, but you 
may require more or fewer depending on the load each server has to handle.

I know of sites that have a single PDC and no BDCs with over 800 Windows 
domain member clients - and they have no problems. If your PDC or BDCs are 
doing nothing other than handling of authentication even 1000 Windows clients 
will pose NO problem - so long as they do NOT all logon at the same time.

If your PDC and/or BDCs are also acting as file servers, and you have roaming 
profiles and folder redirection with Outlook Exchange files that are accessed 
live over  the network - even one BDC per 30 clients may not be enough. It 
all depends on load and responsiveness.

I sincerely apologise for your pain. I never meant to mislead anyone. A typo 
is a typo. My advice is to follow Microsoft NT4 domain design guidelines, 
then monitor your Samba log file and client performance. 

- John T.
-- 
John H Terpstra
Samba-Team Member
Phone: +1 (650) 580-8668

Author:
The Official Samba-3 HOWTO & Reference Guide, ISBN: 0131453556
Samba-3 by Example, ISBN: 0131472216
Hardening Linux, ISBN: 0072254971
Other books in production.

<2 cents>

I think the lesson learned here is that in this case (and many others in
IT in general), 95% of the time, there is no hard and fast rule for the
configuration of a system as complex as Samba.  With the ability to meet
the requirements for, and provide support for, several different options
(i.e. smbpasswd, LDAP, winbind or domain member, domain controller,
simple file and print server, etc), even the developers would be hard
pressed to lay down some standard that could/would apply to every
possible configuration.

In this situation, both experience and constant monitoring are the best
tools for making the kind of determination for resource allocation at a
particular site.

</2 cents>

ry

-----Original Message-----
From: samba-bounces+ryanfrantz=informed-llc.com@lists.samba.org
[mailto:samba-bounces+ryanfrantz=informed-llc.com@lists.samba.org] On
Behalf Of John H Terpstra
Sent: Thursday, January 27, 2005 3:39 PM
To: Kelly S. Smelser
Cc: samba@samba.org
Subject: [Samba] Typo in Samba-3 By Example Book, Chapter 5

Kelly,

I have already replied to the list that this is a typo. In my reply I
have 
provided guidelines for determining how many BDCs you need.

In short, Microsoft recommend at lease one NT4 BDC per 150 clients, but
you 
may require more or fewer depending on the load each server has to
handle.

I know of sites that have a single PDC and no BDCs with over 800 Windows

domain member clients - and they have no problems. If your PDC or BDCs
are 
doing nothing other than handling of authentication even 1000 Windows
clients 
will pose NO problem - so long as they do NOT all logon at the same
time.

If your PDC and/or BDCs are also acting as file servers, and you have
roaming 
profiles and folder redirection with Outlook Exchange files that are
accessed 
live over  the network - even one BDC per 30 clients may not be enough.
It 
all depends on load and responsiveness.

I sincerely apologise for your pain. I never meant to mislead anyone. A
typo 
is a typo. My advice is to follow Microsoft NT4 domain design
guidelines, 
then monitor your Samba log file and client performance. 

- John T.
-- 
John H Terpstra
Samba-Team Member
Phone: +1 (650) 580-8668

Author:
The Official Samba-3 HOWTO & Reference Guide, ISBN: 0131453556
Samba-3 by Example, ISBN: 0131472216
Hardening Linux, ISBN: 0072254971
Other books in production.
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