Administrator’s Command Line Guide

Table Of Contents

Chapter 6. Maximizing Storage Cluster Performance

9000-byte jumbo frames). Such settings require switch conﬁguration and often lead to human

errors. 10 Gbit/s network adapters, on the other hand, need to be conﬁgured to use jumbo frames

to achieve full performance.

3. For maximum eﬃciency, use the balance-xor bonding mode with the layer3+4 hash policy. If you

want to use the 802.3ad bonding mode, also conﬁgure your switch to use the layer3+4 hash policy.

6.4 Setting Up Network Bonding

Bonding multiple network interfaces together provides the following beneﬁts:

1. High network availability. If one of the interfaces fails, the traﬃc will be automatically routed to the

working interface(s).

2. Higher network performance. For example, two Gigabit interfaces bonded together will deliver about

1.7 Gbit/s or 200 MB/s throughput. The required number of bonded storage network interfaces may

depend on how many storage drives are on the node. For example, a rotational HDD can deliver up to 1

Gbit/s throughput.

To conﬁgure a bonding interface, do the following:

1. Create the /etc/modprobe.d/bonding.conf ﬁle containing the following line:

alias bond0 bonding

2. Create the /etc/sysconfig/network-scripts/ifcfg-bond0 ﬁle containing the following lines:

DEVICE=bond0

ONBOOT=yes

BOOTPROTO=none

IPV6INIT=no

USERCTL=no

BONDING_OPTS="mode=balance-xor xmit_hash_policy=layer3+4 miimon=300 downdelay=300 \

updelay=300"

NAME="Storage net0"

NM_CONTROLLED=no

IPADDR=xxx.xxx.xxx.xxx

PREFIX=24