On June 22, 2015 11:56:24 PM MDT, Ramana Reddy <gtvrreddy@gmail.com> wrote:
Hi all,
Assume that the client has already ESTABLISHED state with one server, and I want to use the same state of the client with another server with out sending syn and syn+ack packets with the second server. I want to make the second server by default ESTABLISHED state. What are the modifications needed in the linux kernel code and the respective files. I am not worried about security and attacks at this moment.
I don't know the answer, but given this would be very useful in a failover cluster I assume the code is already there or it is an extremely difficult thing to achieve. As I think about the sliding window aspect of tcp implementing a transparent socket handoff from one server to another seems rather difficult. Basically you would need to mirror not only the sockets connection status between the 2 mirrors, but also the in queue data and the sliding window metadata. (Ie. Data that changes millisecond to millisecond.) I haven't been a failover cluster expert in a decade or more, but I don't recall any functionality like that ever existing. Greg -- Sent from my Android device with K-9 Mail. Please excuse my brevity.