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    Configuring the SSR Cluster Geometry (SRC CLI)

    The cluster geometry specifies the number of data nodes in the cluster. In a two-data-node geometry, the two data nodes are configured in the same node group, which means they are backups for each other. In a four-data-node geometry, four data nodes are configured in two node groups. Each node group hosts 50% of the data and contains two data node servers. The two data nodes in each group are backups for each other.

    Note: All data nodes must have equal processor power, memory space, and available bandwidth because they are tightly coupled and share data. If the overall throughput of the data nodes varies from node to node, performance degrades. Therefore, all data nodes must be of the same C Series Controller model.

    Use the following configuration statements to configure the cluster geometry:

    shared database cluster primary nodes {geometry [(all-in-one | two-data-node | four-data-node | two-shared-data-node)];}

    Configure the cluster geometry from any node in the cluster:

    1. From configuration mode enter the statement to configure the cluster geometry:
      user@host# edit shared database cluster primary nodes
    2. Specify the cluster geometry. For example, to set the geometry for two data node:
      [edit shared database cluster primary nodes] user@host# set geometry two-data-node

    The geometry can be set as follows:

    • two-data-node—In the two-data-node geometry, the two data nodes are configured in the same node group, which means they are backups for each other.
    • four-data-node—In the four-data-node geometry, four data nodes are configured in two node groups. Each node group hosts 50% of the data and contains two data node servers. The two data nodes in each group are backups for each other.
    • two-shared-data-node—In the two-shared-data-node geometry, a minimum of three C Series Controllers is required. In this configuration, there are two data-client-nodes and two management servers. One management server must be running on the third C Series Controller and the other one can reside on any data-client-node. This option is for small-scale deployments. You cannot mix data nodes with data client nodes. Using this geometry, you can have up to twenty-two client nodes.
    • all-in-one—This option is for demonstration purposes only, and requires the node type to be configured as a data-client-node.

    Published: 2014-12-10