Redis cluster sentinel

[Alan DeKok]

On Apr 23, 2019, at 6:33 PM, Talel Krimi <talelkrimi01 at gmail.com> wrote:
> 
> how the GGSN retransmits the same packet? it is a UDP protocol, there are
> now way he ll way for an some kind of response ( ACK )

  It's how RADIUS works.  If you want to know more, read RFC 2865 and RFC 5080.

> we did the necessary tuning on our databases ( we are using redis in memory
> database ) and there is no issues with it

  <shrug>  If the server is blocking in rlm_rediswho, then the database does have issues.

  Maybe you're using another database too, and that database is also slow.

  Again, this isn't complex  FreeRADIUS can do 50K packets/s if it's just doing ACKs.  If your system isn't doing that, it's because of local changes.

  We've run FR with sustained loads of 5-10K packets/s to a database.  But that is a very carefully designed system.

  Alan DeKok.