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MCCS allows user to use a web browser to control MCCS from a local server or remote server.
At each server, you can connect to the server where MCCS is configured. There is no need to configure an additional environment file.
(Default access URL is '"http://ipaddress:10080/main'".)
Support IPv6 network environment
MCCS supports both IPv4 and IPv6 network environment configuration.
Therefore, you can configure the existing been using IPv4, IPv6 network environment, disaster recovery system intact.
MCCS Configuration
MCCS Configuration is distinguished according to the disk configuration of data as listed below.
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Each local disk exists in each server and data is replicated real-time to the disk of another node.
Least unit of disk replication is in partition unit. (Recommended unit: LUN).
[Figure] Mirror Disk Environment
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MCCS refers to heartbeat connection when determine a fault of remote node. If 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 UserGuide" Chapter 4. Node" of MCCS Manual for more details about node state)
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Resources are hardware and software components, such as network interface cards (NICs), IP address, applications, disk and etc managed by MCCS.
MCCS can monitor the state of resources and can control which are bring service online, take offline, enable and disable those..
There are two categories of resources in MCCS which are '"general(OnOFF)' and ‘monitor " and "monitor only(None)’". Most resources such as IP address, disk, process and service are '"General' " which MCCS bring online and offline based on management policies.
On the contrary, a '"MonitorOnly' " resource such as NIC cannot be brought online or taken offline by MCCS and only monitored the status and operation.
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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 "Chapter 5. Resource Group Group" of MCCS User Guide" Manual for more details about parallel and failover group.
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Service is a component that is managed by Linux Service Module.
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.
Oracle database
This resource controls the Oracle database.
It detects the Oracle database installed on the system, controls the service and monitors the status.
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It is the 2nd mirror disk set of mirror disk in a cluster to an off-site DR node through WAN, so that mission critical service will be always-on from disasters.
DRBD9 Mirror Disk
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Postgres Plus Advanced Server
This resource controls the PPAS and detects whether PPAS is installed on a system or not, also controls relevant services and monitors their status.