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SCR woes and questions

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SCR woes and questions - 7.Feb.2008 6:46:36 AM   
Belt

 

Posts: 54
Joined: 22.May2007
Status: online 		A customer wants to set up his two standalone E2007 servers as SCR (both same organization, same site, same everything) so that in the event server1 fails, server2 will be up and running almost instantly.

so i check technet and all to use the enable-storagegroupcopy command, i have "first storage group" on both server and mailbox database too.

i ran the command and get:
[PS] C:\Documents and Settings\Administrator\Desktop>Enable-StorageGroupCopy -Identity "ds01\First Storage Group" -StandbyMachine ds02
Enable-StorageGroupCopy : Another standby continuous replication source is already configured at 'C:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group' for 'CopyLogFolderPath'.
At line:1 char:24
+ Enable-StorageGroupCopy  <<<< -Identity "ds01\First Storage Group" -StandbyMachine ds02

what other scr?!?!?, i just installed SP1...
ok, so i got fed up and deleted the mailbox database on ds02 (so that only the first stg group remains).
this time the command runs, i then seed the SCR with the update command, everything copies, the SCR shows healthy and all, but.. where is my mailbox database on the 2nd server?!?!.

i have an empty storage group browsing with the console, but the files are there.
how do i mount that database?
what happens if the 1st server dies and i need to get up ds02 in a hurry?, do i use the move-mailbox configonly command like before SP1?

thanks in advance
Post #: 1
RE: SCR woes and questions - 26.Feb.2008 1:35:34 PM   
jimthemcp

 

Posts: 43
Joined: 19.Sep.2007
Status: offline 		There is a delay in the target database seeding.  You can run the suspend-storagegroupcopy followed by the update-storagegroupcopy cmdlets to force the seeding of the database.

(in reply to Belt)
Post #: 2
RE: SCR woes and questions - 10.Mar.2008 2:46:45 PM   
demetrios.barbalios

 

Posts: 1
Joined: 10.Mar.2008
Status: offline 		A customer wants to set up his two standalone E2007 servers as SCR (both same organization, same site, same everything) so that in the event server1 fails, server2 will be up and running almost instantly.
 
SCR is not almost instantly.  SCR has some manual steps to configure and the Time to Recover could be long.  CCR however is almost instant because it uses some real-time replication and the fail-over is automatic as well.

(in reply to Belt)
Post #: 3
RE: SCR woes and questions - 10.Mar.2008 4:55:25 PM   
tfd6412

 

Posts: 88
Joined: 24.Dec.2007
From: Florida
Status: offline 		Ditto what Demetrios said.  Is there a reason why you didn't go with an implementation of CCR?

Bob

(in reply to demetrios.barbalios)
Post #: 4
RE: SCR woes and questions - 8.Apr.2008 9:50:16 AM   
Belt

 

Posts: 54
Joined: 22.May2007
Status: online 		yes, CCR is prohibitively expensive, you need to have a MS Cluster(2003 Enterprise) and then you need Exchange Enterprise as well, the insane price of the above combo is not worth it at all.
Beside clustering has a lot of usage-related problems the customer wants to avoid, they want independent fully-functional servers.
besides, with CCR i can't install the exchange modules i need(there will be only 2 exchange servers, so each server needs to have client access, hub and mailbox store) with CCR customer would need to buy another server, plus another licence of everything to install hub transport and client access

(in reply to tfd6412)
Post #: 5
RE: SCR woes and questions - 9.Apr.2008 3:56:32 AM   
neilho

 

Posts: 726
Joined: 25.Oct.2004
From: UK
Status: offline 		You're trying to use SCR, a site resilience solution, as a high availability solution normally performed by SCC and CCR.  It's always going to be hard work. 

That aside, SCR has a requirement whereby the storage group and database paths on the SCR source and targets must not conflict with any other storage groups or database paths.  So if you have "First Storage Group" on both servers........


_____________________________

Neil Hobson
Exchange MVP
http://www.msexchange.org/Neil_Hobson

(in reply to Belt)
Post #: 6
RE: SCR woes and questions - 22.May2008 11:43:38 AM   
jcmccabe

 

Posts: 2
Joined: 20.Dec.2006
Status: offline 		I'm working a similar scenario where we want to have a server in two geographically dispersed datacenters, a single exchange07 box in each, with one being the backup utilizing SCR.  It's not the high availability solution we are after but merely the ability to bring up the second server in case of disaster and move users over. 

Is the solution on the SCR server not to create the First Storage Group?  I guess I don't get what was said above.

(in reply to neilho)
Post #: 7
RE: SCR woes and questions - 28.May2008 8:51:26 PM   
hcxeadmin

 

Posts: 134
Joined: 6.Feb.2007
Status: offline 		Belt,

Did it eventually show up?

Thanks,

Hcxe

(in reply to jcmccabe)
Post #: 8
RE: SCR woes and questions - 5.Jun.2008 3:45:44 PM   
darnett

 

Posts: 6
Joined: 30.Jan.2008
Status: offline
quote:

ORIGINAL: jcmccabe

I'm working a similar scenario where we want to have a server in two geographically dispersed datacenters, a single exchange07 box in each, with one being the backup utilizing SCR.  It's not the high availability solution we are after but merely the ability to bring up the second server in case of disaster and move users over. 

Is the solution on the SCR server not to create the First Storage Group?  I guess I don't get what was said above.


SCR replication is  to another server and results in a bunch of log files, which once they number 50 or more and have met the ReplayLagTime, get replayed into a database.  The resulting database is not mounted, and not useable without a detailed manual process taking place.  Short version of the process: activate the DB, check it for consistency, mount it, and repoint AD and the user objects in AD to this new database.

If you are doing SCR from "<server>\First Storage Group\Mailbox Database" to <SCRserver>, the logs and database will need the exact path on the target as are on the source.  A mounted database there with the same name would conflict with that.

(in reply to jcmccabe)
Post #: 9

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