William,

You need to be careful if you are trying to backup while the InterMapper
service/daemon is running. It expects to be able to open and close log files
and chart data files at will, and if you've got them locked for copying,
etc., you may cause the service/daemon to stop because it can't get access
to files it needs.

Regards,

Janice Losgar
Dartware, LLC

-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of William Yardley
Sent: Wednesday, October 24, 2007 9:51 PM
To: InterMapper Discussion
Subject: Re: [IM-Talk] Keeping maps synchronized on different InterMapper
servers?

On Thu, Oct 18, 2007 at 01:26:47PM -0400, Christopher L. Sweeney wrote:
> At 10:00 AM -0400 10/18/07, Steven Good wrote:

>> Keeping maps synchronized on different InterMapper servers?  We have
>> two InterMapper servers that should have the same maps, settings and
>> polling.
[...]
>> Is this as simple as copying over directories and files? 
[...]
>> Do I need to shut down either server when doing the copy (if the way to
>> do this is to copy folders and files)?

> You would definitely need to shut down the test server. I think it
> would be safer if you were to shut down both, to avoid doing the copy
> while IM is in the midst of auto-saving a map or writing something to
> the prefs. (If you want to copy logs and chart data, too, you
> definitely have to shut down both.)

I've been thinking about this too. I don't know if there are plans to
add such a feature, or how many other people it would be useful to, but
it would be very nice if there were a feature to allow multiple
Intermapper machines to share maps, in a master / slave or multimaster
situation (it would be even better if only one machine actually did the
polling, since I imagine having 2-3 or more machines polling the same
devices could cause issues in a large enough environment).

We had a problem on our main Intermapper server recently, and it
definitely reminded us how much we rely on it. Having some built in
functionality for at least a cold spare type setup would be handy for
us, though maybe it's not a feature required by enough users to be worth
adding.

On a semi-related note, is it relatively safe to backup Intermapper maps
/ data using standard backup tools, assuming the maps are generally not
being modified when the backups are running?

w

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