proxy acct records best practices

[TR Missner]

Hello,
I am a new user of freeradius ( no experience with the 1.x version at all ).
I am in the process of setting up radius for accounting of voip records.
Due to the nature of my system blocking must be avoided at all costs.
With this in mind I have configure FR to write accounting records locally to
a file then I have the records proxied to a remote freeradius instance where
the  records are written to a database.
My question revolves around best practices and speed.
Reading and shipping the records off box is very slow ( somewhere around 5 -
10 records per second ).
I believe this may be caused by the latency between the proxy and the master
which is around 150ms.
Of course I could just insert the records in the DB across the WAN but am
not sure whether this would be any faster.
I'm convinced latency is the issue because even when I turn off the
databasing of records on the master and only write to flat files the speed
remains in the same range.

Keeping in mind my newness to freeradius I thought it might be a good idea
to ask the community for suggestions.

Thanks

T
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