Circular logging with exchange 2010

Posted on 2014-02-19
Last Modified: 2014-02-28
Hers is my question.. If I have circular logging enabled on the data bases during a migration, will this affect how far back I can go on a backup to do a restore?
I know with it enabled I cant do incremental backups but was not sure say if I need to do a restore from say 2 weeks ago, if my backups will be affected at all with the circular logging enabled?
Question by:vmich
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
LVL 22

Accepted Solution

Nick Rhode earned 250 total points
ID: 39870624
Depends on the backup mainly.  With circular logging if you did a backup it flushes the logs out after a successful backup.  So if you backed up yesterday and the server went down today you would most likely lose the email you had today because you cannot truncate the logs for they have been overwritten with circular logging.  So in general with circular logging you most likely will lose the mail after the last successful backup.  Some mail is recovered just not all of it.
LVL 37

Assisted Solution

by:Jamie McKillop
Jamie McKillop earned 250 total points
ID: 39870653

If circular logging was not enabled when the backup was taken, you can restore the full backup and then restore any log files you have backed up between that backup and the next full backup. This would allow you to effectively restore the database to any point in time you want. If circular logging was enabled when the backup was taken, you can only restore that full backup, so you are limited to restoring the database to the exact time of any particular full backup you have.


Author Comment

ID: 39870797
so I should then get the backup job running and have it flush the logs during the migration instead of having circular logging enabled?
Is this correct?"
Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

LVL 37

Expert Comment

by:Jamie McKillop
ID: 39870804
If the time to complete your migration is fairly short (couple of days), I would stick with circular logging. Any more than that are you are taking a risk.


Author Comment

ID: 39870810
ok thanks

Author Closing Comment

ID: 39894918

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

This article lists the top 5 free OST to PST Converter Tools. These tools save a lot of time for users when they want to convert OST to PST after their exchange server is no longer available or some other critical issue with exchange server or impor…
A list of top three free exchange EDB viewers that helps the user to extract a mailbox from an unmounted .edb file and get a clear preview of all emails & other items with just a single click on mailboxes.
In this video we show how to create a mailbox database in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Servers >> Data…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

751 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