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Chapter 4. Running and Managing DX Storage

The CSN currently provides network and configuration services for a single DX Storage cluster with

nodes on the shared private network.

Upon boot of a new node onto the internal network via network boot, the CSN will automatically

provide the needed configuration and software. With subsequent boots of a previously known

node on the network, the CSN will recognize the DX Storage node and use its previously assigned

configuration to boot the node.

As of the 2.0 release, the CSN will automatically configure DX Storage in multi-server mode to take

advantage of all available CPU cores. The number of DX Storage processes assigned to each node

is dynamically determined based on system information provided by the node when it requests its

network boot configuration. IP addresses are statically assigned to each node and then maintained

by a CSN process that pings each node every 5 minutes. If a node has not responded to a ping

in an hour, its IP address will be released and a new one assigned if the node should come back

online at a later time. The maximum number of allowed processes per node (no default), the interval

at which nodes are pinged (default 5 minutes) and the length of time the CSN waits before releasing

the IP address for a node that has not responded (default 1 hour) are all configurable. Please

contact your support representative for instructions on modifying these parameters.

A list of all IP address assignments and the associated node's MAC address can be obtained by

running the following command line script:

/opt/caringo/csn/bin/ip-assignments

MAC addresses will appear multiple times in the output if the nodes have enough CPU cores to

support more than one DX Storage process. The script will not return any results if no storage nodes

have been booted yet from a CSN running 2.x software. Node IPs assigned previously under CSN

1.0 will not appear in the script output until the nodes have been rebooted under a 2.x CSN.

In addition to the default network configuration information gathered from the initial configuration

of the CSN, the CSN Console allows editing of several additional configuration parameters.

Any changes to these settings will not take effect until the cluster is rebooted to pick up the new

configuration.

Version 2.0

December 2010