Sarkis Gabriel wrote:
At the moment i have 4 pops around the country and all are feeding from a satellite links, as the company is growing it is becoming very hard to maintain and we are looking to have a central MySQL DB in the UK which feeds the slave machines with the updated info.
I'd suggest to have two distinct mechanisms for authorization (using a read-only database) and accounting (using a write-only database). The authorization database could be replicated on each RADIUS server host using MySQL replication. (because FreeRADIUS will do only read-only requests on the local slave) The accounting data could be saved in text files on the local disk using rlm_sql_log. The data can be pushed later in the central accounting database using radsqlrelay.
One thing I must mention there is a lot of LAG on satellite connection looking at approx 650ms and because of BW cost we do rely on proxies which makes BW usage during the day very expensive, so i would like to be able to replicate maybe once a night lets say at midnight being less busy and cheaper.
You could try to use radsqlrelay in one-shot mode. (see the manpage) Just run radsqlrelay in a daily cron job to push all the accounting data at a fixed hour. -- Nicolas Baradakis