Hi ,

How Lync designated Mater CMS server among Front end servers ?  can we do this manually ?

Hi

So in a Standard Edition deployment typically the CMS is installed to the first standard edition server in your topology. In an Enterprise Edition deployment with multiple front end server within a pool, you require a separate back end server SQL Standard Server 2012 R2+ (recommended). This SQL server will house the CMS database. In an Enterprise Pool, it is not possible to install the CMS to SQL Express like you can with the STandard Edition because of the nature of HA that the EE pool offers. For Lync 2013, database mirroring can be done between 2 SQL nodes in your back end to offer HA on the CMS database itself, or with the latest Lync 2013 CU, SQL clustering is supported too.

thanks

Hi Mark,

Thank you very much for your reply .

when we run the  cmdlet  Get-CsManagementStoreReplicationStatus -CentralManagementStoreStatus

it shows me the ActiveMasterFQDN  , which describe us who is current active Master CMS server among Front end servers.

so , my query is 

How Lync designated Mater CMS server among Front end servers ?  

can we do designate Master server manually ?

Thanks 

Hi

Ahh this is Lync 2010 - sorry assumed 2013 :)

In that case I can understand where you are coming from now. Unfortunately, the master is chosen for you. You have no control over the placement of the master role. I believe it is chosen based on which server has the most recent copy of the data.

For instance If node 1 has the master role, and gets powered off, node 2 will take over the master. As node 2 now holds the most recent copy of the data it will remain the master until such time as its copy is out of date with the cluster. Again this is my belief / may be wrong, but logically I believe it to be right knowing how standard windows clustering goes.

thanks

Hi,

Please try to use the following Lync Server Management Shell to move Central Management Server on the FE Server which you want to move to:

Move-CsManagementServer

Best Regards,
Eason Huang  

Hi Eason Huang,

Thank you for your reply .

Move-CsManagementServer   cmdlet lets us to move CMS server from one pool's FE server to other pool's  FE server but it can't let us to move perticular FE server within the pool .  Lync atumatically select one of FE server as master CMS server among FE server within the pool , so here I want to understand how Lync designates FE server to Master CMS server among FE server.

Thanks

Hi

The following blog will describe the CMS in detail for 2010. Though may not tell you explicity how the master is elected (Probably the first Lync server installed) but will give you some great insight

http://blogs.technet.com/b/jenstr/archive/2010/10/13/what-is-central-management-store-cms.aspx

thanks