[RadiusNT] Re: RadiusNT Digest

Edsonet ( administrator@yellowhead.com )
Sun, 08 Oct 2000 09:46:40 -0600

That's exactly what we do. The deletion process is a stored procedure which
is only run once the call data has been transferred. The transfer process
itself does have some expense, but only for as long as it takes to create
an offline recordset with the data to be transferred. If you don't need the
data, then just dump it without bothering with the transfer. Our volume is
relatively small, so we only run it once every 3 or 4 days, but larger
sites may have to run it daily at non-peak hours.

J.A. Coutts
Systems Engineer
**************** REPLY SEAPRATER ******************
At 12:01 AM 10/08/2000 -0700, you wrote:
>But once again, its all about the query. For example, lets say you have
>an index on calldate. If you want to delete records older than 24
>you could (although bad) do this:
>Delete From Calls
>Where DateDiff(d, GetDate(), CallDate) > 1
>However, this is VERY expensive, since it has to compare every record
>and compute the difference. However, its better to do this:
>DECLARE @deldate datetime
>Select @deldate = DateAdd(d, -1, GetDate())
>Delete From Calls Where CallDate < @deldate
>What this does is figure out the date ahead of time (which, all dates
>are just numbers) and can use the index to find the candidates. There
>no computation with every record and can speed up select/delete calls
>Dale E. Reed Jr. Emerald and RadiusNT/X
>IEA Software, Inc. www.iea-software.com

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