• USB boot loader example.
Following is an example section of the syslinux.cfg that is contained in the root directory on
the USB flash drive.
label normal
kernel kernel
append initrd=fsimage ramdisk_size=128000 root=/dev/ram0
castor_cfg=http://172.16.1.200/castor/cfg-list.txt
Note
The append command must be entered on a single line. It is shown here on multiple
lines because of space limitations.
• Configuration list file example.
The castor_cfg kernel configuration parameter specifies a file that contains a list of URLs for all
the configuration files that are to be loaded by a DX Storage node. DX Storage configuration files
are evaluated in the order in which they are listed in the configuration list file.
Although DX Storage configuration parameters can be defined multiple times, the last definition is
the only one used. Using redefinitions of parameters, you can layer configuration files so that they
contain generally applicable values for a cluster, a group of similar nodes, and values specific to
one node.
An example configuration list file follows:
http://172.16.1.200/castor/cluster.cfg
http://172.16.1.200/castor/subcluster.cfg
http://172.16.1.200/castor/testnode.cfg
Each of the configuration files in the list file uses the same format as the DX Storage node.cfg
file. See the /caringo/node.cfg.sample in the DX Storage software distribution. For more
information about configuration parameters, see the DX Object Storage Administration Guide.
2.6. Network Devices and Priority
By default, all DX Storage Ethernet network adapters are encapsulated into a redundant bond
interface where one device is active and the others are backups. In this default mode, the first
network device is the preferred one. You can override this behavior in the following situations:
• Network adapter, such as an IPMI card, must be excluded from use
• Preferred network adapter change for network load management
• Bonding of multiple adapters for increased throughput
First, you might need to configure the ports on the switch for the appropriate mode as required by
that mode; these are normally link-aggregation or 802.3ad. DX Storage supports all Linux bonding
driver supported modes.
To override DX Storage's default handling of the network devices, you must edit one of the following
boot configuration files:
• syslinux.cfg if the node is booting from the USB flash drive
Copyright © 2010 Caringo, Inc.
All rights reserved
13
Version 5.0
December 2010
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