Solved

Exchange2010 DAG and log

Posted on 2014-09-29
6
108 Views
Last Modified: 2014-10-12
I have been working on Exchange 2003 standalone server and took over the responsibility of administrating exchnage2010.
I know in exchange2003 we have db and log folders. tans action log disabled/enabled hence they get flushed out with backup.
I noticed in my new environment we have two ex201in DAG. The first hold the DB1(active) and log and second hold again copy of db1(Passive) and log folders.
Where the logs coming from to  the second server since the db is not active (passive copy ) and it is being synched with active?
How the log files are being committed in the active server?
0
Comment
Question by:sara2000
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 8

Accepted Solution

by:
tshearon earned 400 total points
ID: 40351505
The passive copy of a database, depending on its log truncation settings, should be the same as the active copy. Therefore it should have the same log files as well. Should the server where the active db resides become unavailable then the log files on the server that has the passive copy would be necessary to pick up and run without data loss. It's part if it's failover operation and is normal. Hope that helps.
0
 

Author Comment

by:sara2000
ID: 40353739
IF i understood correctly  the log files are being copied to the secondary server then committed to the passive database.
The passive database stays same as active?
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40354345
That is correct. The passive database is the same.
0
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

 

Author Comment

by:sara2000
ID: 40358505
Tshearon,

How the trasaction logs are being committed at both active and passive?
Should we have to run backup at both?
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40358532
Not sure what you mean by that first question, the databases, unless you have lagged them, are the same. So are the logs. Typically when you backup Exchange with a DAG present you would be backing up the Dag, ie the passive copies.
0
 
LVL 31

Assisted Solution

by:Gareth Gudger
Gareth Gudger earned 100 total points
ID: 40360691
Agree with TShearon. Exchange-aware backup solutions will back up the DAG, not the individual server.

Most backup programs like Symantec Backup Exec are configured to back up the passive copy. They will only back up the active copy if they cant get a good backup of the passive copy, or, it is unavailable.

The Active database doesn't truncate its logs until it knows the Passive database has the logs. Logs creep can be an issue if you are having replication problems between the DAG members.

Although in 2013 SP1 I believe there is a new measure you can configure to prevent this scenario.
0

Featured Post

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
Marketers need statistics and metrics like everybody else needs oxygen. In this article we explain how to enable marketing campaign statistics for Microsoft Exchange mail.
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question