Messages in this thread | | | Date | Mon, 13 Jun 2016 14:20:07 +0900 | From | Simon Horman <> | Subject | Re: [PATCH ipvs-next] ipvs: count pre-established TCP states as active |
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On Sun, Jun 12, 2016 at 06:27:39PM +0300, Julian Anastasov wrote: > > Hello, > > On Fri, 3 Jun 2016, Michal Kubecek wrote: > > > Some users observed that "least connection" distribution algorithm doesn't > > handle well bursts of TCP connections from reconnecting clients after > > a node or network failure. > > > > This is because the algorithm counts active connection as worth 256 > > inactive ones where for TCP, "active" only means TCP connections in > > ESTABLISHED state. In case of a connection burst, new connections are > > handled before previous ones have finished the three way handshaking so > > that all are still counted as "inactive", i.e. cheap ones. The become > > "active" quickly but at that time, all of them are already assigned to one > > real server (or few), resulting in highly unbalanced distribution. > > > > Address this by counting the "pre-established" states as "active". > > > > Signed-off-by: Michal Kubecek <mkubecek@suse.cz> > > Acked-by: Julian Anastasov <ja@ssi.bg> > > Simon, please apply!
Thanks, done.
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