HPE StoreOnce 6500 User Manual page 15

Administrators can create elements such as libraries, NAS shares, replication mappings, and StoreOnce
Catalyst stores for a service set. They can also expand or contract the service sets that make up a
Federated store. When creating or modifying such an element, the system prompts you to select the
target service set to which it relates.
IMPORTANT: The number of available service sets depends on the number of couplets in the
cluster configuration. The minimum is 2 (for a single couplet in one rack), the maximum is 8 (for a
two–rack installation with four couplets).
Table 5: Select Target Service Set parameters
Parameter
Name
Status
Available <devices> Remaining
Why are there two service sets for each couplet?
There are two service sets for each couplet installed in the StoreOnce System rack to ensure resilience
and failover. Each Service Set has a VIF associated with it. This VIF is the IP address used to configure
replication mappings and StoreOnce VTL, NAS, or StoreOnce Catalyst devices as backup targets in the
backup application.
Each node in a couplet can run both service sets during a node failure, and each service set has its own
set of service processes and storage. Each service set is associated with:
• A primary node, the node on which it usually runs.
• A secondary node, where it will run if the primary node fails.
Each node can act as the secondary node for the main Service Set on the other. During a failover, the
service set moves transparently from the primary node to the secondary node. Because each storage
cluster in the couplet has two connections, one from each node, the service set can still access storage
on the primary node even though it is now running on the secondary node.
Description
The name of the Service Set. There are two for
each couplet in your cluster configuration.
The status of the Service Set.
This column is displayed when you create a library
or share and indicates how many devices you can
still create for this service set. The maximum
devices available depends upon the number of
couplets in your configuration. The maximum is 48
for a single couplet.
Getting started 15