> On Jul 23, 2018, at 7:27 AM, Susan Hinrichs <[email protected]> wrote:
>
> We use a load balancer in front of our clusters of ATS servers to scale
> horizontally. You could also just leverage ECMP routing in your router to
> similarly distribute connections (plus some extra work to deal with servers
> coming up and down). We have a proprietary CARP plugin to share cached
> data between servers. Moving forward I think that logic is being folded into
> the next hop logic, parent selection logic.
In addition, for a small number of servers, multiple A-records and some sort of
IP-take over would probably work well (using e.g. the other “CARP” :-). Funny
enough, the CARP that Susan refers to is Microsoft’s Cache Array Routing
Protocol (or some such), whereas traditional CARP is
https://en.wikipedia.org/wiki/Common_Address_Redundancy_Protocol
For a small set of servers, I’d look at something like that I think. Another
known to work option is Linux’s HA features, like Heartbeat and Pacemaker (I
think).
Cheers,
— leif
