
Overview
MCCS (Mantech Continuous Cluster Server) is a High Availability (HA) Duplexing Solution for continuous service of corporate computer systems. Service interruptions due to natural disasters, system errors, operator errors, etc. cause enormous cost losses and affect a company's social image and economic value. Additionally, planned service interruptions such as system changes and backups also incur cost losses. MCCS minimizes downtime in these situations and provides infrastructure stability that maximizes service availability by automatically restoring the same level of service in the event of a failure.
Key terms
- Resource: Minimum unit of hardware/software managed by MCCS
- Resource group: A set of resources required to operate as a single service.
- Node: Unit of cluster configuration, virtual/physical server with MCCS installed
- Two Node Cluster: A "Two node cluster" is a cluster consisting of two nodes. The two nodes are composed of an operation node and a standby node and operate like a single system.
- Single Node Cluster: A "Single node cluster" is a cluster of one node. Unlike a double node cluster, it consists of one node, so failure detection is only possible.
- Heartbeat: Communication act of transferring status information and commands between duplicated nodes
- Failover: The act of allowing the service to operate on a standby node in the event of an operating node failure.
Among the various resources that can be configured in MCCS, the three resources below are for allocating IPs that enable communication between cluster nodes to VM instances in the AWS environment.
You can register the AWS functions below as MCCS resources and detect when status abnormalities occur.
- AWS Overlay IP (OIP) Resource This is a resource that allows MCCS to manage AWS by creating a routing destination address (Destination) on the AWS network interface with a specified virtual IP address. https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Route_Tables.html
- AWS Secondary Private IP (SIP) Resources This is a resource that allows MCCS to manage AWS by specifying the secondary private IP address of the AWS network interface with the specified virtual IP address. https://docs.aws.amazon.com/vpc/latest/userguide/vpc-eips.html
- AWS Elastic IP (EIP) Resource This is a resource that allows MCCS to manage AWS by specifying an Elastic IP address allocated using the AWS Elastic IP feature to a network interface. https://docs.aws.amazon.com/vpc/latest/userguide/vpc-eips.html
For more details, please refer to the MCCS guide or contact info@mantech.co.kr
Highlights
- Failure detection and automatic failover
- Support for various operating environments
- Replication of data in real time
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Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
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Overview This release enhances MCCS with expanded cloud-aware high-availability capabilities and improved operational stability across hybrid environments. New AWS-specific agents, network resource enhancements, and REST APIs have been added to strengthen service continuity and automation in cloud deployments. In addition, extensive improvements and bug fixes across clustering, storage, networking, and licensing components significantly improve reliability, performance, and fault-handling in real-world HA/DR scenarios.
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What's New
- Added an AWS IP resource agent (routing tables, secondary private IPs, and Elastic IPs)
- Support for virtual MAC addresses on Linux
- Unified MCCS licensing, including mixed support for node-locked licenses and floating licenses
- REST APIs for creating MCCS resources and monitoring their status
- Support for collecting vCenter event logs
- Improvements
- Improved failover behavior in timeout and snapshot validation scenarios
- Enhanced split-brain handling when partial or online nodes join the cluster
- Optimized AWS network resources to reduce CPU usage and improve stability
- Improved locking behavior by switching from group-level locking to node-level locking
- Improved the scope of monitoring failure detection logic and monitoring timeout handling for each resource
- Updated core components and libraries to improve performance and security
- Bug Fixes
- Fixed multiple failover and recovery issues related to split-brain and quorum handling
- Fixed stability issues affecting shared storage resources
- Fixed network-related issues affecting VIPs and outbound connections
- Fixed memory leaks and resource exhaustion issues occurring during long-running operations
- Fixed license handling issues in multi-license and floating license environments
- Fixed issues affecting remote management/monitoring integration and status monitoring in virtualized environments such as OpenStack and VMware
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Known Issues No known issues were identified under normal operating conditions.
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Upgrade Notes No additional configuration changes are required after upgrading in this release.
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Compatibility / Requirements Supported Operating Systems (Official Installation Support)
- Red Hat Enterprise Linux: 7, 8, 9
- CentOS: 7, 8
- Ubuntu (LTS only): 16.04, 18.04, 20.04, 22.04
- SuSE Enterprise Linux: 12, 15
- Oracle Enterprise Linux 7, 8, 9
Minimum system requirements
- CPU: 4 cores (or higher)
- Memory: 2 GiB (or higher)
Additional details
Usage instructions
This is a virtual image that allows you to check the functions of MCCS.
Access the MCCS web console (https://<EC2_Instance_Public_IP> :11080/).
The license included in the AWS MCCS AMI is a temporary license. For initial account information, refer to the installation manual. https://www.mantech.co.kr/wp-content/uploads/2024/01/MCCS-Guide.pdf
Please contact info@mantech.co.kr for product purchase and consultation.
Resources
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Support
Vendor support
MCCS offers 24/7 support services. https://www.mantech.co.kr/inquiry/
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.