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MCCS refers to heartbeat connection when determine a fault of remote node.
all the heartbeat connection is disconnected from the remote node, it is considered as a failure.
Therefore, redundant heartbeat connection is strongly recommended because failure on heartbeat network can result in node failure.
Please refer to "4. Node of MCCS UserGuideManual" for more details about node state.
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Resource group is a set of resources with dependency and MCCS failover the entire resources in a group.
For example, to manage the ORACLE service by MCCS, IP address that is connected by client, network interface card, disks which database is stored, ORACLE listener and server service must be enclosed by a unit which is called as Group.
Group should be configured as IP address dependent on network interface card, ORACLE server dependent on disk where database is stored, ORACLE listener dependent on ORACLE server to provide proper service.
IP address cannot be assigned without network interface card, process related to ORACLE can be bring online after disk completed online. If there is more than a group defined on a cluster, one group will failover without affecting the other groups.
There are two types, parallel and failover group, according to the service.
Please refer to "5. Resource Group of MCCS User Guide MCCS Manual" for more details about parallel and failover group.
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It manages the Windows based NetBIOS names.
SCSI-LOCK
SCSI-LOCK uses SAN protocol which is called SCSI-3 PR(Persistent Reservation).
This is needed to prevent any data corruption which enable only one node can access a disk volume in environment where disk volumes are shared between nodes.
Shared disk DR
It is the mirror set of shared disk in a cluster to an off-site DR node through WAN, so that mission critical service will be always-on from disasters.
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