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At least 500MB is needed.

Network Interface Card

It is recommended 3 NICs(Network Interface Card) as below are needed to configure a mirror disk.

  • NIC for Service
  • NIC for Heartbeat
  • NIC for Mirror

It is recommended 2 NICs(Network Interface Card) as below are needed to configure a shared disk.

  • NIC for service
  • NIC for Heartbeat

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Warning

SE Linux must be disabled.
Network Manager service must be disabled.
If kernel modules that are used by the resources of the MCCS is ONDEMAND type, before resource online the module must be active.
In order to use MirrorDisk resource, you should pre-install DRBD 8.3.13.
For more details about DRBD installation, please refer to“8- Appendix DRBD Installation”of this document.)
In order to use SCSI Reservation Disk resource, you should pre-install sg3_util (yum install sg3_util)

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Each node in a cluster should have at least one IP address for every NIC to be used by MCCS. Virtual IP addresses which is switchable between nodes which communicate to clients also should be reserved. (The number of virtual IP address can be variable according to the clients' needs).)
When you reserve virtual IP addresses, this must be on the same subnet as the real IP address of the NIC of node. For example, if the real IP address of the NIC is 10.10.10.10/255.255.255.0, virtual IP addresses that MCCS uses on that NIC must be in the form 10.10.10.x/255.255.255.0 where x is any unassigned number from 1 to 254.

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    • Either volume size should be the same on both servers or volume size of standby server should be bigger for mirror disk environment.
    • MCCS supports DAS, SAN, iSCSI
      (. However, MCCS does not replicate the data on network driver like NAS.)

Shared Disk

  • Support SAN, DAS and iSCSI.

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When failure occurred in a group, MCCS will online the service resources on the standby which runs the same resources on the active. Users need to add the service resources mentioned above to manage by MCCS. 
Please refer to "Chapter 7. Resource of MCCS Manual" for more details about adding a resource by the user .
Before adding a resource, user should decide what kind of service of resource and read the following in advance and these attributes will be set.

  • Process Service 
    • Directory where program of Process is registered
    • Program name in a form of single process that executable
    • The name of the account that you want to run
  • Application Service
    • Directory location of script files of the program to register Application
      (Please refer to "Chapter 7. Resource of MCCS Manual" for more details.)
    • The name of the account that you want to run
  • Linux service
    • Turn '"off' " the start level of service registered in the Linux service manager.
    • Same service name for the both nodes registered in the Linux service manager.

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