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Welcome to the HCL Sametime® 11.5 administration documentation
Configuring
This section provides information on configuring the servers for HCL Sametime 11.5.
Clustering
This section will discuss clustering steps specific to the HCL Sametime Community server.
Clustering Community Servers
Community server clusters allow you to have high capacity and fail over/redundancy for Community services. For more information on clustering and capacity planning, see planning section in Community Services. Sametime leverages the Domino clustering feature to keep the VPUserInfo.nsf database replicated and up to date on participating servers. The user’s privacy configuration and contacts are stored in this database.

Welcome to the HCL Sametime® 11.5 administration documentation
- Accessibility features for Sametime
  Accessibility features help users who have a disability, such as restricted mobility or limited vision, to use information technology products successfully. HCL® strives to provide products with usable access for everyone.
- What's new in HCL Sametime
  This section describes what's new in HCL Sametime® 11.5 and Sametime® Meetings 11.5.
- Checklist to deploy Sametime
  This section provides information on reviewing the checklist to deploy the Sametime clients.
- Planning
  This section describes the system requirements and server configurations needed for HCL Sametime 11.5.
- Installing
  This section provides information on installing and configuring the servers for HCL Sametime 11.5.
- Configuring
  This section provides information on configuring the servers for HCL Sametime 11.5.
  - Setting up business cards
    You can configure the Sametime Community Server so that business card information about an individual displays when a user hovers over a name in a chat window or a contact list.
  - Community Services
    This section will discuss configuration steps specific to the HCL Sametime Community server.
  - Clustering
    This section will discuss clustering steps specific to the HCL Sametime Community server.
    - Clustering Community Servers
      Community server clusters allow you to have high capacity and fail over/redundancy for Community services. For more information on clustering and capacity planning, see planning section in Community Services. Sametime leverages the Domino clustering feature to keep the VPUserInfo.nsf database replicated and up to date on participating servers. The user’s privacy configuration and contacts are stored in this database.
      - Assigning users to a Home Sametime Server 
        This topic discusses the concept of the Home Sametime Server setting, its purpose, use and configuration. 
      - Create the Domino cluster
      - Creating a cluster document in the Configuration Database
        The Sametime cluster document enables the servers in a cluster to operate as part of the cluster, and enables the servers outside of the cluster (but within the community) to communicate with the cluster.
      - Copying a cluster document to all Sametime Community Servers
        Each Sametime Community Server cluster has a Cluster Information document, which was created on one Sametime server in the cluster. Every server in the Sametime community must have a copy of this Cluster Information document, even if the server is not part of a cluster. The document allows users to share presence and instant messaging capabilities with all other users in the community, regardless of their home server assignment.
      - Setting up the load-balancing network device
      - Enabling scheduled replication
        When clustering Domino servers, the cluster replicator task will keep the databases synchronized, but it is a best practice to also schedule a periodic replication.
      - Ensuring all Community Servers have the same settings
  - Meetings
    This section will discuss Meetings configuration steps specific to the HCL Sametime Meetings server.
- Securing
  This section provides information on securing HCL Sametime 11.5 environments.
- Administering
  This section provides information on administering HCL Sametime 11.5 environments.
- Troubleshooting
  Troubleshooting and Support
- Migrating and Upgrading
  This section provides information on migrating and upgrading from an earlier Sametime release.
- Notices

Clustering Community Servers

Community server clusters allow you to have high capacity and fail over/redundancy for Community services. For more information on clustering and capacity planning, see planning section in Community Services. Sametime leverages the Domino clustering feature to keep the VPUserInfo.nsf database replicated and up to date on participating servers. The user’s privacy configuration and contacts are stored in this database.

Before you begin

The Domino server on which the Sametime server is installed must be registered in the same Domino domain as the other servers participating in the cluster.
A network device is required to front-end the cluster, this can be an IP sprayer, load balancer, or round robin DNS.
All Sametime Community servers must be able to connect to each other on ports 1352 and 1516. This is required for the full mesh topology discussed in the planning topic for Community Services.
The Sametime Community servers should be installed and functioning properly (able to login as a user and chat).
The community ID must be the same for all servers.
The VP_SECURITY_LEVEL setting in the sametime.ini must be the same on all participating servers.
All Sametime servers must share the same directory settings for LDAP or native Domino server.

About this task

Limitations

Only 6 servers are supported in a cluster.
You can install up to 5 standalone muxes per Community server. The muxes can service more than one Community server.
Participating servers should be collocated.

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