On 22/02/20 1:11 am, David Touzeau wrote: > Hi > > Is Squid handle TCP Fast open on modern kernel ? > Not currently. AIUI the kernel may be configured with the feature on inbound connections. But Squid does not read it until at least one I/O cycle after the handshake completion anyway, so I would expect little performance gain unless the connection RTT is large. > Has anyone tried to implement this directive and noticed a performance > improvement ? > Not that I am aware of. For inbound traffic; Kernels that support fast-open do not really need Squid support. They can buffer the early data until Squid reads it in. Adding support to Squid for this should not be too difficult. Patches or PR's welcome. For outbound traffic; Squid is designed to open connections first (possibly a very long time) before data is sent. So fast-open would require a significant re-design of the task scheduling systems. IMO we would get better gains by simply re-ordering the tasks so connection opening operated in parallel to assembly of the outbound request. Anyone wanting to attempt that should get in touch via squid-dev. Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
