Hi Matthias

This depends on your customer base. Fact is, that you'll never have a window where no customer is affected. However you'll have that certain spot in your RRDs, where the usage is the lowest. This would probably your preferred maintenance window.

In my recent jobs, the sweet spot was usually the night from Sunday to Monday at around 2:00-3:00 CET. This also has the advantage, that if something goes wrong, you'll be in the office after the maintenance anyway and can fix things.

As for the interval - it again depends on your needs. Furthermore it depends on the redundancy of your platform - the more redundancy, the less outages are caused by maintenance. The best thing is if you can announce a maintenance which generates no service interruption. Customers love that, because it shows that you keep your systems up-to-date (marketing!) and they don't have any impact on their services.

Cheers, Viktor

On 19.04.2012 06:22, Matthias Hertzog wrote:

Good monrning

I'm trying to figure out the best day, time and interval for our maintenance window. When do you have your maintenance windows? What interval? How does swisscom, cablecom and the others do it?

Thanks and best wishes, Matthias

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mhs @ internet AG Zürcherstrasse 204, CH - 9014 St. Gallen Phone +41 71 274 93 93, Fax +41 71 274 93 94 http://www.mhs.ch _________________________________________

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