Hello
To confirm Steve’s times, once the Citrix server has contacted the license server once, if it disconnects from it, it has 30 days before it stops accepting connections – we actually tested this for a similar piece of work just the other week, that’s why I remember.
Angela, as you suggest, It might be worth reallocating a portion of your license to the new license server (if you have overhead in your licenses to do this) and then to point one of your servers to it.
Out of curiosity, why do you need a license server in remote location?
Cheers
Russell
Russell Robertson | Virtual Stream | T:+44 (0)1224 580970 | M:+44 (0)7881 922 745 | Microsoft, Citrix and VMware advisers |
From: thin-bounce@freelists.org [mailto:thin-bounce@freelists.org] On Behalf Of Steve Greenberg
Sent: 09 February 2009 17:22
To: thin@freelists.org
Subject: [THIN] Re: License server across WAN Link
Angela,
You will not lose current license functionality when you return licenses and re-allocate at mycitrix.com, the license file you have loaded into your current license server will continue to work.
Any server can point to any license server, or, you can make it the farm wide setting so you can mix and match as you need
When connection to a license server is lost the current sessions are okay and the timeout/grace period comes in to effect at that point, new sessions are allowed during this period ( I think it is 96 hours now, don’t remember for sure). However I think there is an issue when you reboot a server because it will not get’s it startup license- can anyone else verify this?
Steve Greenberg
Thin Client Computing
34522 N. Scottsdale Rd D8453
Scottsdale, AZ 85266
(602) 432-8649
steveg@thinclient.net
From: thin-bounce@freelists.org [mailto:thin-bounce@freelists.org] On Behalf Of Angela Smith
Sent: Monday, February 09, 2009 5:20 AM
To: thin@freelists.org
Subject: [THIN] Re: License server across WAN Link
Hi Jeremy
Thanks for your reply. The WAN link is 30Mb so Im hoping the Citrix Servers will have a reliable connection to the License Server at all times. I will give it a go. I read a few Citrix documents but I have a few questions.
1) I need to get my licenses re-issued as the server name in the UK is different to the existing License Server. If I return existing licenses will my Production farm stop working? There may be a gap of a few days before the new license file is added to the new Licensing Server. I want to ensure existing Citrix Production users are not impacted when the licenses are returned.
2) Are there any issues with setting 1 Citrix Server to use the new Licensing Server in the UK whilst the other Citrix servers point to local License Server? Id like to do this for testing purposes to ensure the Citrix Servers are working off the remote UK License Server before moving the entire farm to the remote License Server.
3) If the Citrix Server looses connectivity to the License Server, will the existing Citrix User sessions be dropped or would they be given a grace license automatically until the connectivity to the Citrix License Server is restored? Is this seamless to the user?
Thanks
Ang
Subject: [THIN] Re: License server across WAN Link
Date: Mon, 9 Feb 2009 19:34:46 +1100
From: Jeremy.Saunders@datacom.com.au
To: thin@freelists.org
Hi Ang,
The short answer is that this will most probably cause problems and is a bad design. There are some awesome whitepapers from Citrix on how the licensing service works. But basically this is what I typically write in my design documents (taken straight from the whitepapers)…
“At startup, a XenApp server talks to the License Server and gets a startup license. This action will consume 9.87Kb of bandwidth. If the License Server is not available, the server goes into the grace period and the IMA (Independent Management Architecture) Service reports an error to the Event Log. The process of getting a startup licenses also occurs if the IMA Service is restarted at any point.
Every 2 to 5 minutes the XenApp will exchange a heartbeat with the license server to determine if the license server is still available. The amount of bandwidth in this transaction is 462 bytes for each server. The heartbeats are randomised between 2 to 5 minutes from when the server checks out a start-up license.
Every 24 hours the XenApp server will request a refresh of the license server data, this is to check if license allocation has been increased or decreased. The amount of bandwidth in this transaction is 9.87Kb for each server.
When a user logs on, the XenApp server tries for 5 seconds to request a license; if this process fails the user gets a grace period license (30 days).”
So you can see that communication to the licensing server is important, otherwise your servers may continually (or randomly) dish out grace period licenses, which also causes delays in the logon time.
At the end of the day you can only try it and see. You can set the UK license server at the server level in the Access Management Console on one of your servers and see how this behaves.
Cheers,
Jeremy.
From: thin-bounce@freelists.org [mailto:thin-bounce@freelists.org] On Behalf Of Angela Smith
Sent: Monday, February 09, 2009 3:10 PM
To: thin@freelists.org
Subject: [THIN] License server across WAN Link
Hi
Our organisation is looking at utilising a "centralized" Citrix Licensing server in another country (UK) across a decent sized WAN Link. We currently have a local Citrix Licensing Server. Will there be any performance issues with accessing the new license server across the WAN? Should the license server be on the same LAN as the Citrix Servers? Are there any gotchas in changing licensing servers?
Setup is Windows 2003 with Presentation Server 4
Thanks
Ang
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