DAG requirements
- Hi
Does Exchange Standard 2010 support DAG?
What are exact requirement for DAG.
Thanks
Vijay
Answers
- Yes, Exchange Standard edition supports HA/DAG Feature and mentioned in below blog...EXCHANGE 2010 – REVVING THE ENGINES FOR LAUNCHOn the server side, Exchange Server Standard will now support high availability, so all customers can take full advantage of the new database availability group capabilities. Exchange Server Enterprise enables configurations with up to 100 databases per server.
Amit Tank
MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, Configuration
MCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.com- Proposed As Answer byAmit TankMVPFriday, November 06, 2009 9:25 AM
- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:43 PM
So, sum it up, you'll need Exchange 2010 STD for DAG (keep in mind your limited on the number of databases: 5) and Windows 2008 Enterprise edition to support clustering. If you need more then 5 databases then you'll want to go Enterprise.
I also recall reading somewhere that Exchange 2010 will support Databases up to 2TB in size.
You can also take into consideration that a DAG can support up to 16 Databases.
So, in reality do you want to have 10TB of data (which for some orgs is not nearly enough) or more?
Does your current mail environment have more then 8TB of space being used for mail?
SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007 -- http://www.scottfeltmann.com- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:44 PM
So, sum it up, you'll need Exchange 2010 STD for DAG (keep in mind your limited on the number of databases: 5) and Windows 2008 Enterprise edition to support clustering. If you need more then 5 databases then you'll want to go Enterprise.
5 'active' databases per server for Standard I believe. You could have 80 DBs on there, but only 5 can be active.
Brian Day: MCSA 2000/2003, CCNA, MCTS: Microsoft Exchange Server 2010 Configuration, Overall Exchange/AD Geek.- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:43 PM
All Replies
- Yes, DAG is a new feature of Exchange 2010. You can get idea on generic requirements of DAG from Planning HA/SR article...Planning for High Availability and Site ResilienceUnderstanding Database Availability Groups
Amit Tank
MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, Configuration
MCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.com- Proposed As Answer byAmit TankMVPFriday, November 06, 2009 9:25 AM
- Thanks Amit.
But I could find the exact requirement for DAG. We would like to use DAG as Mailbox DR. So while gathering requirement I came across above question.
I found that DAG functionality is using windows cluser server so It need Windows 2008 Enterprise edition but what about Exchange version?
As per http://technet.microsoft.com/en-us/library/bb232170(EXCHG.140).aspx
"Microsoft Exchange Server 2010 is available in two server editions: Standard Edition and Enterprise Edition . Enterprise Edition can scale to 100 databases per server; Standard Edition is limited to 5 databases per server. Even though Exchange 2010 comes in two edition offerings, these are licensing editions that are defined by a product key. When you enter a valid license product key, the supported edition for the server is established."
So my question is - Will standard version of exchange 2010 support DAG feature?
Thanks
Vijay Dalimkar
- Yes, Exchange Standard edition supports HA/DAG Feature and mentioned in below blog...EXCHANGE 2010 – REVVING THE ENGINES FOR LAUNCHOn the server side, Exchange Server Standard will now support high availability, so all customers can take full advantage of the new database availability group capabilities. Exchange Server Enterprise enables configurations with up to 100 databases per server.
Amit Tank
MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, Configuration
MCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.com- Proposed As Answer byAmit TankMVPFriday, November 06, 2009 9:25 AM
- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:43 PM
So, sum it up, you'll need Exchange 2010 STD for DAG (keep in mind your limited on the number of databases: 5) and Windows 2008 Enterprise edition to support clustering. If you need more then 5 databases then you'll want to go Enterprise.
I also recall reading somewhere that Exchange 2010 will support Databases up to 2TB in size.
You can also take into consideration that a DAG can support up to 16 Databases.
So, in reality do you want to have 10TB of data (which for some orgs is not nearly enough) or more?
Does your current mail environment have more then 8TB of space being used for mail?
SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007 -- http://www.scottfeltmann.com- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:44 PM
Actually it supports ~16GB but it is recommended to control at 2TB...So, sum it up, you'll need Exchange 2010 STD for DAG (keep in mind your limited on the number of databases: 5) and Windows 2008 Enterprise edition to support clustering. If you need more then 5 databases then you'll want to go Enterprise.
I also recall reading somewhere that Exchange 2010 will support Databases up to 2TB in size.
You can also take into consideration that a DAG can support up to 16 Databases.
So, in reality do you want to have 10TB of data (which for some orgs is not nearly enough) or more?
Does your current mail environment have more then 8TB of space being used for mail?
SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007 -- http://www.scottfeltmann.comMailbox Server Storage Design Recommendationshttp://technet.microsoft.com/en-us/library/dd346703(EXCHG.140).aspx
-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-Database and Log file Guidance: Database Size
Description: The on disk database file size (.edb)
Standalone: Supported/Best practices:
Supported: ~16TB
Best Practice: 100GB or less
Best Practice: Provision for 120% of calculated max database size.
HA: Supported/Best practices:Supported: ~16TB
Best Practice: 2TB or less
Best Practice: Provision for 120% of calculated max database size.
-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-
Amit Tank
MVP: Exchange Server | MCTS: Microsoft Exchange Server 2010, Configuration
MCITP: EMA | MCSA: M | Blog: http://ExchangeShare.WordPress.comSo, sum it up, you'll need Exchange 2010 STD for DAG (keep in mind your limited on the number of databases: 5) and Windows 2008 Enterprise edition to support clustering. If you need more then 5 databases then you'll want to go Enterprise.
5 'active' databases per server for Standard I believe. You could have 80 DBs on there, but only 5 can be active.
Brian Day: MCSA 2000/2003, CCNA, MCTS: Microsoft Exchange Server 2010 Configuration, Overall Exchange/AD Geek.- Marked As Answer byVijay Dalimkar Friday, November 06, 2009 6:43 PM
- Thanks Amit, I thought I read 16TBs somewhere but couldn't find it.
Not sure why someone would want to have a 16TB database, I'm willing to bet performance wouldn't be that great. Maybe in respect to archiving?
Hmm....
SF - MCITP:EMA, MCTS: MOSS 2007, OCS 2007, Exchange 2007 -- http://www.scottfeltmann.com - So Here I will conclude this thread as DAG requirement as below for small organization (1-100 users)
Software Requirement
1. MS Exchange 2010 Standard Edition (Will have 5 live database) - 2 Numbers (2 DAG) + 1 (Edge Transport)
2. Windows 2008 SP2 or Windows 2008 R2 Enterprise edition. - 2 Numbers + 1 (Edge Transport)
3. Exchange standard CAL (As per no. of users) and Exchange Enterprise CAL (As per no. of users)
4. Backup software - I will use Windows in-built backup utility to take backup of database on fileserver as we will using DAG for DR.
Again we need to see whethere mailbox level backup of exch 2010 is possible in Windows 2008 - NTBackup?
5. AntiVirus./AntiSpam - We can use MS ForeFront and Edge transport server to to this.
Hardware requirements
1. Two server hardware where
First server can be good configuration server for example -
Dell PowerEdge T710Intel® Xeon® E5502, 1.86Ghz, 4M Cache, 800MHz Max Mem
16 or 32 GB RAM (not so costly)
300 GB SAS x 2 RAID 1 - OS/Transactional logs
450 GB SAS x 3 RAID 5 - Databases
450 GB SAS x 1 Global Hot spare
Second Same configuration server with SATA hard disk so will have database redundancy with minimal cost (It will less then traditional windows cluster solution) . These two server will be in DAG.
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Please correct me if I miss any.
Thanks
Vijay
