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MCCS (Mantech Continuous Cluster Server) is a high-availability solution for mission-critical computing systems developed by Mantech
 It is a highly available solution that resolves the problems with general failure such as natural disasters, or system failures, or unexpected service interruptions caused by terrors, forced occupation or an operator's mistakes and provides the system availability to maintain the service.
Normal business of companies in our current industries is conducted in computers, and most of the core information for this needs continuous service on a 24/7 basis. Mission critical systems require no downtime server infrastructure, but you will meet many types of service failures which bring in negative business impacts. 
MCCS solves these problems and provides a high-availability solution for missions-critical systems.

 

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Offers Remote Management Web Console

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'.)



MCCS Configuration

MCCS Configuration is distinguished according to the disk configuration of data as listed below.

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Shared disk (SCSI or SAN) is connected to both servers physically.
MCCS attaches the file system on shared disk to the only active server and lock to the standby server to prevent file system corruption.

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[Figure] Shared Disk Environment

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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)

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[Figure] Mirror Disk Environment

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MCCS  uses 4 TCP ports for heartbeat connection.
Four TCP ports (default is 14321~14324) registered to configure the environment and ICMP Echo Requests are used.

Check the state of a node

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It is similar to process. But this is more complicated. Application works with several application or scripts such as tomcat.
MCCS does only detect on execution file, but it also brings online/ take offline/monitor the process by using pre-defined script.

Shared Disk

MCCS monitors the status of I/O path for a node connected to the external shared storage.

Mirror Disk

 When  When there is no shared disk in a cluster, data is saved in local or the direct-connected storage.
In such an environment, TCP/IP based mirror components are used to copy the changed data.

Service

Service is a component that is managed by SCM (Service Control Management) of Window O.S. 

Virtual Name

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. 

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