Solved

DNS cache locking and dynamic DNS record update

Posted on 2014-11-25
2
238 Views
Last Modified: 2014-11-28
I was reading a part of DNS cache locking. I can't find much information about how this works with DNS dynamic updates.

In Technet
'Cache locking is configured as a percent value. For example, if the cache locking value is set to 50, then the DNS server will not overwrite a cached entry for half of the duration of the TTL. By default, the cache locking percent value is 100. This means that cached entries will not be overwritten for the entire duration of the TTL. The cache locking value is stored in the CacheLockingPercent registry key. If the registry key is not present, then the DNS server will use the default cache locking value of 100.'

So, the default cache locking was always 100%. So, until TTL of the resolved DNS record passes, the cached DNS record will not be overwritten. If then, when a internal device changes its record, what happens? Will DNS server returns the old DNS record of the device to requests?

Can anyone explain how DNS caching and dynamic update work together to respond correct DNS information to requests?

Thanks.
0
Comment
Question by:crcsupport
2 Comments
 
LVL 26

Accepted Solution

by:
DrDave242 earned 500 total points
ID: 40465749
If then, when a internal device changes its record, what happens? Will DNS server returns the old DNS record of the device to requests?
Records for internal devices (records registered in zones for which the server is authoritative, in other words) don't get placed in the server cache - there's no point in caching them, since the records are right there on the server - so cache locking doesn't apply.
0
 
LVL 1

Author Closing Comment

by:crcsupport
ID: 40470510
!!!!!!!!!!!!!!!!
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
What to do when Windows Update is not working correctly? What tools can I use to detect the cause of the malfunction problem? What does this numeric error code mean? These and other questions that you have been asking in the past are answered here (…
This tutorial will walk an individual through locating and launching the BEUtility application and how to execute it on the appropriate database. Log onto the server running the Backup Exec database. In a larger environment, this would generally be …
This tutorial will walk an individual through the steps necessary to configure their installation of BackupExec 2012 to use network shared disk space. Verify that the path to the shared storage is valid and that data can be written to that location:…

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