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authorTom Briden <[email protected]>2015-05-29 10:40:34 +0100
committerTom Briden <[email protected]>2015-06-01 15:56:55 +0100
commitdd0baa002cf09286f5d80e046e8c8611f9e20d10 (patch)
tree30d9633cb7c9c47941e0373259cae663c1b1a4bb /lib/ssl/src/ssl_tls_dist_proxy.erl
parentefbfe9602983ff451b864e557bdf3733222b78ba (diff)
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Honour dist_nodelay socket option in tls_dist proxy
If a plaintext cluster has nodelay=1 then so should the tls cluster; significant performance issues have been seen when nodelay isn't set
Diffstat (limited to 'lib/ssl/src/ssl_tls_dist_proxy.erl')
-rw-r--r--lib/ssl/src/ssl_tls_dist_proxy.erl33
1 files changed, 25 insertions, 8 deletions
diff --git a/lib/ssl/src/ssl_tls_dist_proxy.erl b/lib/ssl/src/ssl_tls_dist_proxy.erl
index a22af6b960..c5e473f923 100644
--- a/lib/ssl/src/ssl_tls_dist_proxy.erl
+++ b/lib/ssl/src/ssl_tls_dist_proxy.erl
@@ -133,6 +133,7 @@ accept_loop(Proxy, erts = Type, Listen, Extra) ->
Extra ! {accept,self(),Socket,inet,proxy},
receive
{_Kernel, controller, Pid} ->
+ inet:setopts(Socket, [nodelay()]),
ok = gen_tcp:controlling_process(Socket, Pid),
flush_old_controller(Pid, Socket),
Pid ! {self(), controller};
@@ -166,7 +167,7 @@ accept_loop(Proxy, world = Type, Listen, Extra) ->
accept_loop(Proxy, Type, Listen, Extra).
try_connect(Port) ->
- case gen_tcp:connect({127,0,0,1}, Port, [{active, false}, {packet,?PPRE}]) of
+ case gen_tcp:connect({127,0,0,1}, Port, [{active, false}, {packet,?PPRE}, nodelay()]) of
R = {ok, _S} ->
R;
{error, _R} ->
@@ -176,7 +177,7 @@ try_connect(Port) ->
setup_proxy(Ip, Port, Parent) ->
process_flag(trap_exit, true),
Opts = get_ssl_options(client),
- case ssl:connect(Ip, Port, [{active, true}, binary, {packet,?PPRE}] ++ Opts) of
+ case ssl:connect(Ip, Port, [{active, true}, binary, {packet,?PPRE}, nodelay()] ++ Opts) of
{ok, World} ->
{ok, ErtsL} = gen_tcp:listen(0, [{active, true}, {ip, {127,0,0,1}}, binary, {packet,?PPRE}]),
{ok, #net_address{address={_,LPort}}} = get_tcp_address(ErtsL),
@@ -192,25 +193,41 @@ setup_proxy(Ip, Port, Parent) ->
Parent ! {self(), Err}
end.
+
+%% we may not always want the nodelay behaviour
+%% %% for performance reasons
+
+nodelay() ->
+ case application:get_env(kernel, dist_nodelay) of
+ undefined ->
+ {nodelay, true};
+ {ok, true} ->
+ {nodelay, true};
+ {ok, false} ->
+ {nodelay, false};
+ _ ->
+ {nodelay, true}
+ end.
+
setup_connection(World, ErtsListen) ->
process_flag(trap_exit, true),
{ok, TcpAddress} = get_tcp_address(ErtsListen),
{_Addr,Port} = TcpAddress#net_address.address,
- {ok, Erts} = gen_tcp:connect({127,0,0,1}, Port, [{active, true}, binary, {packet,?PPRE}]),
- ssl:setopts(World, [{active,true}, {packet,?PPRE}]),
+ {ok, Erts} = gen_tcp:connect({127,0,0,1}, Port, [{active, true}, binary, {packet,?PPRE}, nodelay()]),
+ ssl:setopts(World, [{active,true}, {packet,?PPRE}, nodelay()]),
loop_conn_setup(World, Erts).
loop_conn_setup(World, Erts) ->
receive
{ssl, World, Data = <<$a, _/binary>>} ->
gen_tcp:send(Erts, Data),
- ssl:setopts(World, [{packet,?PPOST}]),
- inet:setopts(Erts, [{packet,?PPOST}]),
+ ssl:setopts(World, [{packet,?PPOST}, nodelay()]),
+ inet:setopts(Erts, [{packet,?PPOST}, nodelay()]),
loop_conn(World, Erts);
{tcp, Erts, Data = <<$a, _/binary>>} ->
ssl:send(World, Data),
- ssl:setopts(World, [{packet,?PPOST}]),
- inet:setopts(Erts, [{packet,?PPOST}]),
+ ssl:setopts(World, [{packet,?PPOST}, nodelay()]),
+ inet:setopts(Erts, [{packet,?PPOST}, nodelay()]),
loop_conn(World, Erts);
{ssl, World, Data = <<_, _/binary>>} ->
gen_tcp:send(Erts, Data),