members of the default partition. By default, all Exalogic compute nodes are full
members of the default partition. To make an Exalogic compute node a limited
member of the default partition, add the port GUIDs of the compute node as
limited members of the default partition. In addition, ensure that IPoIB is enabled
on the default partition.
• Exalogic nodes as limited members of the default partition will not be able to
communicate with any other Exalogic node in the default partition. However,
client access to Oracle Exadata Database Machine is provided via IPoIB in the
default partition.
• You must disable Subnet Manager (SM) on all InfiniBand switches that are not
using firmware 2.0.4 or above. Exalogic's InfiniBand switches use firmware
versions 2.0.4 or above for partitioning support, and SM should run on one of
Exalogic's InfiniBand switches.
16.10 Partitioning Limitations
Consider the following limitations when creating non-default partitions:
• Once a new partition configuration is successfully committed using the
smpartition command on the current master SM, the configuration is kept
highly available among the defined set of SM instances. However, all Sun
Network QDR InfiniBand Gateway Switches defined to have SM enabled (that is,
defined by the smnodes command on each gateway switch) must be operational
and able to communicate with the other smnodes gateway switches in order for
any change in the partition configuration to take place.
• The limitation for number of partitions per end-port is a constraint defined by the
various end-port implementations. For ConnectX2 and BridgeX, this limit is 128,
which includes the default partition. Hence the maximum number of other
partitions is 127. The CLI interface of the gateway switch does not verify this
explicitly. However, if you specify partitions more than the maximum limit for
any port (GUID), the SM only handles the maximum number of partitions and
then logs a message.
Partitioning Limitations
16-16 Oracle Exalogic Elastic Cloud Machine Owner's Guide
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