TCP connections per channel

[Kumaran Loganathan]

How many TCP connections does a channel create and manage provided the DNS resolution of the server resolves to one ip address? Is it safe to assume that a channel just creates and manages one TCP connection for a given IP address?

Regards,

Kumaran

[Eric Anderson]

On Wed, Jan 17, 2024 at 12:50 PM Kumaran Loganathan <kumaranlo...@gmail.com> wrote:

How many TCP connections does a channel create and manage provided the DNS resolution of the server resolves to one ip address?

Technically, this is a decision that the client-side LB policy makes. However, none of our policies currently create more than one connection per IP to send new RPCs. If you use long-lived RPCs, there could be old TCP connections with those old RPCs on them, but those connections will close when the RPCs complete.

The default LB policy is pick_first, which only has one "active" TCP connection independent of the number of IP addresses. round_robin has one active connection per IP.

[Kumaran Loganathan]

Thanks for the clarification.