From 5863822023ddf65bab3dbf8807c62de5ac685043 Mon Sep 17 00:00:00 2001 From: Richard Henwood Date: Mon, 28 Oct 2013 13:18:06 -0500 Subject: [PATCH] LUDOC-121 LNET: Added details about LNET credits tunable Updated Section 25.3.4 "Network Interface Credits" to describe why someone might want to adjust the number of credits and added a note about making the credit tunable consistent across all systems when o2iblnd driver is used. Signed-off-by: Linda Bebernes Signed-off-by: Richard Henwood Change-Id: I271de47c9c518e5f02284512f0b823403f921685 Reviewed-on: http://review.whamcloud.com/7996 Tested-by: Hudson --- LustreTuning.xml | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/LustreTuning.xml b/LustreTuning.xml index b2c6f84..79ab848 100644 --- a/LustreTuning.xml +++ b/LustreTuning.xml @@ -1,4 +1,5 @@ - + + Lustre Tuning This chapter contains information about tuning Lustre for better performance and includes the following sections: @@ -154,12 +155,12 @@ options ksocklnd enable_irq_affinity=0 By default, this parameter is off. As always, you should test the performance to compare the impact of changing this parameter. -
<indexterm><primary>tuning</primary><secondary>Network interface binding</secondary></indexterm>Binding Network Interface Against CPU Partitions - Lustre 2.3 and beyond provide enhanced network interface control. The enhancement means that +
<indexterm><primary>tuning</primary><secondary>Network interface binding</secondary></indexterm>Binding Network Interface Against CPU Partitions + Lustre 2.3 and beyond provide enhanced network interface control. The enhancement means that an administrator can bind an interface to one or more CPU partitions. Bindings are specified as options to the LNET modules. For more information on specifying module options, see -For example, o2ib0(ib0)[0,1] will ensure that all messages + For example, o2ib0(ib0)[0,1] will ensure that all messages for o2ib0 will be handled by LND threads executing on CPT0 and CPT1. An additional example might be: tcp1(eth0)[0]. Messages for tcp1 are handled by @@ -205,7 +206,7 @@ These can be set using this syntax: options lnet large_router_buffers=8192 - From Lustre 2.3 and beyond, it is possible that LNET may + From Lustre 2.3 and beyond, it is possible that LNET may revalidate the router buffer setting and the administrator's request do not persist. The purpose of the router buffers is to create a system of quotas where no single client can overwhelm the router. Router buffers are allotted to the clients. -- 1.8.3.1