Exchange 2013 Active/Passive servers

Posted on 2014-01-29
Last Modified: 2014-02-12
I am noticing that my DB's are being activated on a server that I am not activating it on. The server that has become passive seemingly has no issues. I reactivate DB on server again and it switches back in less than a week. I am looking for other reason why this may be happening.
Question by:Group_007
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
LVL 13

Assisted Solution

imkottees earned 250 total points
ID: 39820118

you can schedule a script to notify you when there was a failover. check for the events at the time.

Accepted Solution

pcmghouse earned 250 total points
ID: 39820152
Can you please check your CU version.
We had same issue with CU2. CU3 has solved this issue.
(What I have understood is that high availability feature does the automatic load balancing based on the server performance.)

CU3 has fine-tuned some throttle values. I would also suggest to check the HD performance of your servers at peak times.
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39820286
Failover doesn't happen without something being logged. You need to look through the event viewer of both servers to see when the failover occurred and what events proceeded it.

I am seeing a lot of failovers occur during backup runs and as a result of suspect network cards or poor network performance.

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why


Expert Comment

ID: 39820311
I agree with Simon. Virtual Machines have these issues more.
You can check event logs at Operational (Microsoft\Exchange\High Availability). It provides the database mount and unmount events.

Author Comment

ID: 39821091
Thanks alot of good information. I have confirmed that CU2 is the latest update. I will try to update this weekend.

I will also comb through the event logs and report my findings. Thanks very much!

Expert Comment

ID: 39834738
There is a good builtin script i found:
CollectOverMetrics.ps1 -DatabaseAvailabilityGroup DAG1 -Database:"DB*" -GenerateHTMLReport -ShowHTMLReport
Read this link before testing it:

Expert Comment

ID: 39853145
have you upgraded your servers to CU3?

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

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…
Read this checklist to learn more about the 15 things you should never include in an email signature.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to:…
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…

756 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