How can the DNS cache for a caching only DNS server be monitored? How many
entries does it cache? How long? Are any of these attributes configurable?

--
=======================================================
David Johnson, MCP, MCSE, MCSD, MCDBA
<a href = "http://www.azletexas.net">High speed internet for Azle</a>

"David Johnson" <(E-Mail Removed)> wrote in message
news:#(E-Mail Removed)...
> How can the DNS cache for a caching only DNS server be monitored? How
many
> entries does it cache? How long? Are any of these attributes
configurable?

It depends on the DNS server. Some cannot.

With Win2000+ you must turn on the "View\Advanced" to
see the cache -- that is probably what you wanted.

With BIND, you probably have to configure it to save the
cache or write a program extension for viewing it real time.
(Maybe there is one out there, but I do save my cache
occasionally.)

--
Herb Martin
>
> --
> =======================================================
> David Johnson, MCP, MCSE, MCSD, MCDBA
> <a href = "http://www.azletexas.net">High speed internet for Azle</a>
>
>

DJ> How can the DNS cache for a caching only DNS server be monitored?

Using the DNS management console.

DJ> How many entries does it cache?

As many as it can.

DJ> How long?

For the TTL period or for 86400 seconds, whichever is the shorter.

DJ> Are any of these attributes configurable?

Yes.

In news:(E-Mail Removed),
Herb Martin <(E-Mail Removed)> posted their thoughts, then I offered mine
> "David Johnson" <(E-Mail Removed)> wrote in message
> news:#(E-Mail Removed)...
>> How can the DNS cache for a caching only DNS server be monitored?
>> How many entries does it cache? How long? Are any of these
>> attributes configurable?
>
> It depends on the DNS server. Some cannot.
>
> With Win2000+ you must turn on the "View\Advanced" to
> see the cache -- that is probably what you wanted.
>
> With BIND, you probably have to configure it to save the
> cache or write a program extension for viewing it real time.
> (Maybe there is one out there, but I do save my cache
> occasionally.)
>

And just to add, as for the question of 'how long?', that depends on the
records's TTL.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
--
=================================

You can also enum the cache using command line tool dnscmd.exe. dnscmd is
installed with the Support tools on the server cd.

--
William Stacey, MS MVP


"David Johnson" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> How can the DNS cache for a caching only DNS server be monitored? How
many
> entries does it cache? How long? Are any of these attributes
configurable?
>
> --
> =======================================================
> David Johnson, MCP, MCSE, MCSD, MCDBA
> <a href = "http://www.azletexas.net">High speed internet for Azle</a>
>
>

In news:(E-Mail Removed),
Jonathan de Boyne Pollard <(E-Mail Removed)> posted a question
Then Kevin replied below:
> For the TTL period or for 86400 seconds, whichever is the shorter.
>
>> Are any of these attributes configurable?
>
> Yes.
You can change the Maximum cache Time to Live with this registry value, you
may want a longer cache TTL or you may want a shorter TTL, setting the Value
to 0 effectively disables caching. Reasons why you may want to set the
MaxCacheTtl to 0 could be if you have a Caching only root that you are
forwarding to.
Enter this value in seconds.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DNS\Parameters

MaxCacheTtl

Value: MaxCacheTtl
Added: SP4 (April 1998)
Type: DWORD
Default: NoKey (Cache for up to one day, or 86400 seconds)
Function: Set maximum caching TTL.

198408 - Microsoft DNS Server Registry Parameters, Part 1 of 3:
http://support.microsoft.com/default.aspx?scid=198408


--
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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