Short answer:
Yes it's different depending on the version of Exchange and the version of the
TDP.
Longer answer:
With old versions of Exchange and TDP, doing only legacy backups, you only had
the TDP client and a TDP scheduler service.
Starting with Exchange 2010, you can no longer do Legacy backups, you are
*required* to do VSS backups.
If you do VSS backups, you have the admin account and dsmcad involved, and
dsmcad takes on the function of being the VSS requestor (in addition to its
roles as webclient-server-upper and managed-services-scheduler-manager). (It's
not going to make sense from the server side, you would have to see how it is
installed on the client side to know.)
And starting with Exchange 2010, most sites us DAG databases, which is
different than storage groups in Exchange 2007. When you do DAG DB's, it is to
your advantage to use proxy nodes so that all the filespaces are lodged under
one TSM nodename. That prevents you from getting multiple copies of backups
when DB's fail back and forth between Exchange servers, which is what 2010-2013
DAGs are designed to do. Also lets you restore any DB to any Exchange server.
So stuff changes depending on whether you are using a V5 TDP with Ex 2007
Legacy, V5 TDP with Ex 2007 VSS, V6 TDP with Ex2007 legacy, V6 TDP with EX2007
VSS, EX2010 with VSS ,EX2010 with VSS and DAGs and Proxies Oh My.
Some of it is change in the TDP structure, some of it due to change in Exchange
structure, some of it due to TDP changes made to handle the new Exchange
features.
(And I also don't know why sometimes the Exchange TDP reports as MSExchange and
sometimes as WinNT. It's annoying and not consistent, and doesn't seem to have
a Why).
W
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Geoff Gill
Sent: Wednesday, May 14, 2014 10:54 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Exchange backups
Looking for some Exchange knowledge. Last week admin ID's for nodes were being
removed and it was discovered 2 days later that this broke the Exchange
backups. Once they were put back backups started working again but what
confuses me is when comparing 2 different sites things seems to work
differently as it relates to Exchange.
I have no access to the client side, only the TSM server, so I can't relay
anything except what I see here. At one site the nodes are set up just like any
other node it looks like. Licensing shows 2 Exchange TDP in use but when
looking at q no the platform shows WinNt. These nodes do NOT have an associated
admin ID that I can find and backups work just fine. Why things report the way
they do I don't understand.
The second site licensing shows 6 Exchange TDP in use and q no on these show
the Platform as TDP MSExchg. These nodes are also configured with Proxynode
Agents too whereas the first site is not. Why this I don't understand either.
Since I don't know much about Exchange backups in general I would have assumed
based on the first site this would be the normal way they would be set up.
This second site is the one that Exchange backups stopped working when the
Admin ID's were deleted. I put everything back and backups work now but when
looking at the admin ID's it seems as though only one of them shows Days Since
Last Access 1 so I don't know if removing the others would break this again or
not. Support told me these Admin ID's need to be there for Exchange to work but
this doesn't seem to be the case at the site that works where are no admin
ID's there are not associated with an Exchange node.
Hopefully someone has some explanation for this.
Thank You
Geoff Gill
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