[THIN] Re: License server across WAN Link
- From: Angela Smith <angela_smith9@xxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 9 Feb 2009 23:19:32 +1100
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@xxxxxxxxxxxxxx
To: thin@xxxxxxxxxxxxx
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@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Angela
Smith
Sent: Monday, February 09, 2009 3:10 PM
To: thin@xxxxxxxxxxxxx
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
Combine
your email accounts here! Want
to marry your mail?
Confidentiality and Privilege Notice
This document is intended solely for the named addressee. The
information contained in the pages is confidential and contains legally
privileged information. If you are not the addressee indicated in this message
(or responsible for delivery of the message to such person), you may not copy
or
deliver this message to anyone, and you should destroy this message and kindly
notify the sender by reply email. Confidentiality and legal privilege are not
waived or lost by reason of mistaken delivery to you.
_________________________________________________________________
Need a new place to rent, share or buy? Let ninemsn property help
http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Edomain%2Ecom%2Eau%2F%3Fs%5Fcid%3DFDMedia%3ANineMSN%5FHotmail%5FTagline&_t=774152450&_r=Domain_tagline&_m=EXT
Other related posts:
