Before the SAS High-Performance Analytics infrastructure can be installed on the analytics
cluster, you must create a file named gridhosts that lists all of the machines in
the cluster. The SAS High-Performance Analytics environment, SAS Plug-ins for Hadoop,
and the SAS High-Performance Computing Management Console all use the gridhosts file
for
Message Passing Interface (
MPI) communication. (The gridhosts file is copied to each machine in the cluster during
the installation process.
For more information,
see Deploying SAS High-Performance Computing Management Console.)On blade 0, create a
file named gridhosts in /etc. (On Greenplum,
blade 0 is known as the Master Server.)
In the gridhosts file,
list one machine per line. You can use IP addresses or fully qualified
domain names (FQDNs). However, all FQDNs must resolve to IP addresses
and must be in the same DNS domain and sub-domain.
CAUTION:
The gridhosts file
must contain only those machines that are members of your analytics
cluster or data appliance. These machines are the NameNode (or Root
Node) and its DataNodes (or Worker Nodes). If the management console
is located on a machine that is not a member of the analytics cluster,
then the console machine must also contain a copy of /etc/gridhosts with
its FQDN added to the list of machines.
The
root node is listed first. Depending on your data provider, the root node is also the machine
that is configured as the following:
-
-
Greenplum Data Computing Appliance:
Master Server
Here is an example
of a gridhosts file:
grid001.example.com
grid002.example.com
grid003.example.com
grid004.example.com
...
Note: Make sure that there are
no whitespace characters in your gridhosts file. The SAS High-Performance
Analytics environment can skip entries when it encounters whitespace
characters (such as tabs).