| General |
View cluster information such as: - System view –
whether you view the logical cluster as an entire
cluster, or as individual instances.
- Automatically
start logical cluster – whether to start the logical
cluster when the cluster starts.
- Failover mode –
whether instances are brought online as a group or
individually.
- Fail to any –
whether any instance, or only a specific instance, can
be a failover resource.
- Down routing
mode – how client connections are routed if the logical
cluster designated by the routing rule is
unavailable.
- system – sends unroutable
connections to the system logical cluster.
- open – sends unroutable
connections to the open logical cluster.
- disconnect – disconnects
unroutable connections.
- Login distribution mode – how connections are
distributed in logical clusters with multiple instances.
The login distribution mode does not affect
single-instance logical clusters.
- affinity – the instances
accepting a connection retains it as long as the
target logical cluster is running on that
instance. If the load profile specifies a load
threshold, and the load on the instance is too
high, the workload manager redirects the
connection to the least-loaded instance in a
logical cluster. If the target logical cluster is
not running on the instance, the workload manager
redirects the connection to the least-loaded
instance in a logical cluster.
- round-robin – incoming
connections are distributed in a round-robin
fashion among the instances hosting a logical
cluster. For example, if “SalesLC” is running on
“ase1” and “ase2”, the workload manager sends the
first connection to “ase1,” the next to “ase2”,
and so on. Load scores are not included in the
algorithm.
- Logical cluster roles – whether this
logical cluster assumes an open role, meaning that all
connections that are not routed to a logical cluster via
an explicit routing rule are routed to the current open
logical cluster. When you create a new cluster, the
system logical cluster is automatically designated the
open logical cluster. You can reassign the open role to
another logical cluster. However, only one open logical
cluster can exist per physical cluster.
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| Base Instances |
Base instance names, their identification numbers, and their current state.
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| Failover Instances |
Failover instance names, their identification numbers, their current state, and
the failover to which they belong.
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| Routes |
Routing applications, logins, and aliases that are associated with the logical
cluster.
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| Load Profile |
The load profile assigned to the logical cluster or view the
current load profile information such as:- Metric weights assigned to the selected load
profile
- Minimum load score
- Login redirection
- Dynamic connection migration
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