[cisco-voip] max devices controlled by a ccm user

[c3voip]

I think I may have found the answer:

 

http://technet2.microsoft.com/windowsserver/en/library/54094485-71f6-4be8-8e
bf-faa45bc5db4c1033.mspx?mfr=true

 

 

Maximum Database Record Size

The maximum size of a database record is 8110 bytes, based on an 8-kilobyte
(KB) page size. Because of variable overhead requirements and the variable
number of attributes that an object might have, it is impossible to provide
a precise limit for the maximum number of multivalues that an object can
store in its attributes. For all practical purposes, the size of objects is
not significant in Windows Server 2003 Active Directory and is not
significant in Windows 2000 if you use the recommended guidelines described
in "Static Data" later in this chapter.

The only value that can actually be computed is the maximum number of values
in a nonlinked, multivalued attribute when the object has only one attribute
(which is impossible). In Windows 2000 Active Directory, this number is
computed at 1575 values. From this value, taking various overhead estimates
into account and generalizing about the other values that the object might
store, the practical limit for number of multivalues stored by an object is
estimated at 800 nonlinked values per object across all attributes.

	
http://technet2.microsoft.com/library/gallery/templates/MNP2.Common/images/n
ote.gifNote: 

	
Attributes that represent links do not count in this value. For example, the
members linked, multivalued attribute of a group object can store many
thousands of values because the values are links only.

The practical limit of 800 nonlinked values per object is increased in
Windows Server 2003. When the forest has a functional level of Windows
Server 2003 or Windows Server 2003 interim, for a theoretical record that
has only one attribute with the minimum of overhead, the maximum number of
multivalues possible in one record is computed at 3937. Using similar
estimates for overhead, a practical limit for nonlinked multivalues in one
record is approximately 1200. These numbers are provided only to point out
that the maximum size of an object is somewhat larger in Windows Server
2003.

 

Thanks,

-C

 

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of c3voip
Sent: Tuesday, February 26, 2008 4:51 PM
To: 'Wes Sisk'
Cc: 'Cisco VoIPoE List'
Subject: Re: [cisco-voip] max devices controlled by a ccm user

 

What am I missing?  Why was I able to associate 1583 devices before I
finally got this error instead of 850 or less?

 

-C

 

From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: Tuesday, February 26, 2008 3:05 PM
To: c3voip
Cc: 'Cisco VoIPoE List'
Subject: Re: [cisco-voip] max devices controlled by a ccm user

 

that took a while.

CM4.x SRND:
http://www.cisco.com/go/srnd

"NoteThe list of devices associated with a user is stored in the directory
as a multi-valued attribute. If you are using the embedded Cisco Unified
CallManager 4.x directory (known as DC Directory), the maximum number of
devices that can be associated with a user is 2,000 (or 2,500 if all
subscribers in the cluster are dual-CPU servers). However, Microsoft Active
Directory limits the number of values that can be stored in a multi-valued
attribute. The total size of the record should never exceed 7,000 bytes,
which allows for approximately 850 attribute value"

/Wes

c3voip wrote: 

Active Directory

 

Are these limits published somewhere?  I guess that is a stupid question.for
AD it would be on www.microsoft.com.

 

Thanks,

-C

 

From: Wes Sisk [mailto:wsisk at cisco.com] 
Sent: Tuesday, February 26, 2008 10:26 AM
To: c3voip
Cc: 'Cisco VoIPoE List'
Subject: Re: [cisco-voip] max devices controlled by a ccm user

 

What LDAP are you using for CM?  DCD (native) / Active Directory / Netscape
/ ...

Usually this is limited by the field size in the associated ldap storage
base.

/Wes

c3voip wrote: 

I have an IP Phone Service that requires that the CTI user associated with
the service has each phone that runs the service as a controlled device.  

 

I went to add the 1584th device to it, and I got an "Error: -11" with no
description.  

 

That seems like a strange number to finally error out on if there is a limit
to the number of devices controlled by one user. 

 

I am running CCM 4.1(3)sr5b.

 

Thanks,

-C

 

 

 
 
 
 



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