Thanks for your info Ondrej, it's much appreciated! I've done both unique, overlapping and identical prefixes on these peers. The unique one costs the routeserver more memory than I had unfortunately. I'll let you know if I have anything to share. Regards, Patrick

On Thu, Jun 22, 2017 at 10:26:03AM +0200, Patrick.deNiet@os3.nl wrote:

...

Hi everyone!

I am currently looking into the performance of BIRD (bgp) as a route-server with ~700 peers with 10k prefixes each. I'm noticing an increase in convergence time as I increase these numbers (which is not a surprise).

Unfortunately, I do not have a deep enough understanding of the code and have not managed to identify these points. Is anyone here able to give some pointers as to where in the code we could place these markings to measure this?

Hi

It is hard to tell, esp. it depends on your setting and configuration and would need some benchmarking. It is single-table or multi-table route server [1][2]? Personally i would guess that it is in TX, because you receive a route and then send it about ~700 times (but that depends on whether prefixes from different peers are shared or unique). You could benchmark it with 'export none' to see the difference.

Also note that hash table used for routing table has max size of 64k buckets. You could try attached patches to fix that. That may help significantly.

I would be interested in your performance results.

[1] https://gitlab.labs.nic.cz/labs/bird/wikis/Route_server_with_community_based... [2] https://gitlab.labs.nic.cz/labs/bird/wikis/Route_server_with_community_based...

-- Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."