[THIN] Re: Citrix Disaster Recovery

Hi Andrew

Good Point.  I'll look at utilising the servers in DR also.  I simply need to 
ensure the 100Mb link doesn't get saturated.  You also make a very good point 
on versions.  I'll ensure the Web Interfaces are the same version on both ends.

What backend services are you referring to?  We use Active Directory for 
authentication.  We have DC's in both sites.

Ive made a copy of existing apps and have disabled / hidden them.  These apps 
are associated with the DR servers.  I was simply going to enable the 
applications in a DR scenario.  We use AD groups to grant application access.  
Since the applications are copied, these AD settings remain on the DR apps.  If 
I used servers in both sites then I could remove the DR applications as the 
production ones would work anyway..  Would I be correct in stating this?  I 
duplicated the applications as I assume all Published Applications will 
dissappear in a DR scenario as all Production Citrix Server in Site 1 will not 
be available hence my duplicating and assigning to DR servers.

The Licensing Server is on our Zone Data Collector in Site 1..  I actually 
forgot about this all together..  We have a ZDC in DR but it doesn't have 
licensing installed.  Whats the best way to replicate this?  Should I simply 
Restore the Production ZDC / Licensing server to a server in DR (without 
changing the server name)?   Whats the best way to do this??

Thanks
Ang

> From: andrew.wood@xxxxxxxxxxxxxxxx
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: Citrix Disaster Recovery
> Date: Thu, 27 Mar 2008 11:15:39 +0000
> 
> I'd question why you DR servers are never used; you've a fair bit of tin
> there that's going to waste - and perhaps more importantly, the last thing
> you need in a disaster is to find out that there is a problem with your DR
> site servers: if they're in active use this is less likely to happen.   
> 
> I'd also say, keep *all* of your configuration settings the same - so don't
> have different versions at the two sites; primarily for the 'what could go
> wrong will' 
> 
> Whats happening with your backend services? How are you going to control
> which uses are able to connect to the service when you've implemented the dr
> policy. Where is your citrix and terminal server license server situated? 
> 
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
> Of Angela Smith
> Sent: 27 March 2008 11:07
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Citrix Disaster Recovery
> 
> 
> Hi
> 
> I am implementing a Citrix DR solution and I wanted to share my design with
> the group to see if there are better ways of doing it
> 
> 2 sites in the same state connected with a 100Mb link
> 
> Site 1 (Main Site)
> 
> Citrix Zone 1
> 2 x Citrix Web Interface (Physical Server)
> 1 x SQL Server (shared) for DataStore
> 20 x Citrix Presentation Server 4.0 (Physical Server)
> 1 x Primary Zone Data Collector (Dedicated Physical Server)
> 1 x backup ZDC (on existing Presentation Server)
> 
> 
> Site 2 (DR Site)
> 
> Citrix Zone 2
> 1 x Citrix Web Interface (Virtual Server)
> 1 x SQL Server (shared) for DataStore
> 8 x Citrix Presentation Server 4.0 (Physical Server)
> 1 x Primary Zone Data Collector  (on existing Presentation Server)
> 1 x backup ZDC (on existing Presentation Server)
> 
> All servers are in a single Citrix farm but across 2 zones.  The Zone Data
> collectors do not share information as the servers in Site 2 are not used.
> They will only be used in a DR scenario.  The SQL database is replicated to
> the DR site nightly.
> 
> I have a few queries I was hoping the group could help with
> 
> 1) Site 1 uses Web Interface 4.2.  Will there be any issues if I use Web
> interface 4.6 at Site 2?  Will WI 4.6 change anything on the farm that may
> affect WI 4.2?
> 
> 2) In a DR scenario, I was expecting to simply change the DNS entry which
> users use to connect to the Production Web Interface (Site 1) to that of the
> DR Web Interface server (Site 2) via a simple IP change.  I have duplicated
> all Production Published Apps and have associated them to the Citrix Servers
> in Site 2.
> 
> Would this work?  Is there a better way to do this?  Any help or links to
> best practice guides appreciated
> 
> Thanks
> Angela
> 
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