SAS Grid Question

[SAS_1001]

Hello,

In a cluster Metadata SAS Grid Environment, generally how many metadata servers are recommended to install 2 or 3.  Where they will be installed on local storage or shared storage ?

Thanks !

[AndrewHowell · Accepted solution]

Why not try a Google search: "Metadata server cluster" ?

Results:

• SAS® Help Center: How Metadata Server Clustering Works
• SAS® Help Center: Configuring a Metadata Server Cluster
• SAS® Help Center: Metadata Server Clustering
• SAS 9.4 metadata cluster: what and why? - SAS Users Groups

In brief:

• A metadata server cluster requires minimum three metadata servers ("nodes").
• If the cluster has an odd number of nodes, more than half are required to be running for the cluster to operate.
• If the cluster has an even number of nodes, half are required to be running for the cluster to operate, as long as the master node is included in that half.
• Although the cluster appears to the SAS user as a single metadata server, each node in the cluster maintains its own configuration files, metadata, logs & journals.
• Apart from machine name, all nodes in the cluster must essentially be configured identically - operating system, file mounts/mappings, etc..
• IOM load processing, managed by the master node, is used for the nodes to communicate.
• Although it is common to see these as separate branches of shared storage, the nodes do not require shared storage.

[SAS_1001]

Thank you !