Deploy Dell PowerFlex v3.6.x

Creating the MDM cluster

You can create the MDM cluster in 5-node, 3-node, or single node mode.

You can create the MDM cluster in the following modes:

3-node cluster
One primary MDM, one secondary MDM, and one tiebreaker (TB). This cluster can sustain a single point of failure.
5-node cluster
One primary MDM, two secondary MDMs, and two tiebreakers. This extended cluster can sustain two points of failure.
Single-node cluster
One primary MDM. Single-node cluster has only one copy of the repository, thus it cannot sustain a failure. It is not recommended to use Single Mode in production systems, except in temporary situations.

An MDM can be installed on any server. For example, one MDM can run on an application server, while the second MDM can run on any other server, for example one of the SDS nodes.

NOTE: For CLI commands, in cluster mode, use the IP address of the primary MDM or the virtual IP address.

The following is the proper order for creating an MDM cluster:

Order of creating a cluster:

Install the MDMs with Manager role (two in a 3-node cluster, or three in a 5-node cluster).
Install the MDMs with TB role (one in a 3-node cluster, or two in a 5-node cluster).
Create a single-node cluster from one of the Manager MDMs.
Add secondary MDMs to the cluster, as Standbys.
Add tiebreakers to the cluster, as Standbys.
Switch the cluster to 3-node or 5-node mode, while designating the standby secondary and standby tiebreaker names in the cluster.

Proceed to the appropriate section that describes the cluster mode that you want to install.