Hoangle: /* TIPC Configuration */

2012-06-06T06:08:50Z

‎TIPC Configuration

Hoangle: /* Optional and nice to have in case receiver/machine is running slow to avoid packet drops from tipc (flow control) */

2012-06-06T06:08:16Z

‎Optional and nice to have in case receiver/machine is running slow to avoid packet drops from tipc (flow control)

Stone: Created page with "== TIPC Configuration == ===Overview=== OpenClovis uses the TIPC http://tipc.sourceforge.net/ Linux kernel module to provide low latency communications between nodes in the …"

2011-10-05T15:19:56Z

Created page with "== TIPC Configuration == ===Overview=== OpenClovis uses the TIPC http://tipc.sourceforge.net/ Linux kernel module to provide low latency communications between nodes in the …"

New page

== TIPC Configuration ==

===Overview===
OpenClovis uses the TIPC [[http://tipc.sourceforge.net/]] Linux kernel module to provide low latency communications between nodes in the cluster. However, as configured out-of-the-box, TIPC sometimes has trouble handling the bandwidth required for telecom applications.

This can result in link "flapping" (several rapid link-level drops and reconnects) or dropped packets.

===FAQ===

* '''How can the TIPC configuration be changed to support higher bandwidth?'''
: You need to recompile the TIPC module. Directions on compiling kernel modules are all over the internet so shall not be repeated here. Increase/modify the following macros in the tipc source code before recompiling tipc module:

* TIPC_DEF_LINK_WIN
: to 250
: in include/net/tipc/tipc_bearer.h
* TIPC_MAX_LINK_WIN
: to 300
: in include/net/tipc/tipc_bearer.h

* BCLINK_WIN_DEFAULT
:to 150 (from 20)
:in net/tipc/bcast.c

====Optional and nice to have in case receiver/machine is running slow to avoid packet drops from tipc (flow control)====

* OVERLOAD_LIMIT_BASE.
: Change the default from 5000 to say 8000 (some tweaking may be necessary based on the difference in performance of your machines)
: in net/tipc/socket.c

* TIPC_FLOW_CONTROL_WIN
: from 512 to say 3000
: in include/net/tipc/tipc_port.h
: This will also alleviate the condition for the reliable or SOCK_STREAM tipc topology notification socket which can also be impacted.

<strong>Make sure that TIPC_FLOW_CONTROL_WIN*2 <= OVERLOAD_LIMIT_BASE</strong>

Then recompile and after reloading tipc and establishing both the links, confirm link window shows 250 instead of the default of 50 with tipc-config -ls=<link-name>

← Older revision		Revision as of 06:08, 6 June 2012
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−	=== UDP configuration ===	+	== UDP configuration ==
	[[Switch_your_model/image_from_TIPC_to_UDP]]		[[Switch_your_model/image_from_TIPC_to_UDP]]

← Older revision		Revision as of 06:08, 6 June 2012
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	Then recompile and after reloading tipc and establishing both the links, confirm link window shows 250 instead of the default of 50 with tipc-config -ls=<link-name>		Then recompile and after reloading tipc and establishing both the links, confirm link window shows 250 instead of the default of 50 with tipc-config -ls=<link-name>
		+
		+
		+	=== UDP configuration ===
		+	[[Switch_your_model/image_from_TIPC_to_UDP]]

TIPC Configuration - Revision history

Hoangle: /* TIPC Configuration */

Hoangle: /* Optional and nice to have in case receiver/machine is running slow to avoid packet drops from tipc (flow control) */

Stone: Created page with "== TIPC Configuration == ===Overview=== OpenClovis uses the TIPC http://tipc.sourceforge.net/ Linux kernel module to provide low latency communications between nodes in the …"