2.2.3. Cluster services

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All server cluster manager features are broken down into several independent services. Each service has specific characteristics. You can view the list of services, their brief description and characteristics below:

Service	Description	Characteristics
Object locks	Stores pessimistic (not transaction-based) object locks.	Memory Replication Migration+ Instancing by infobases
External session management	Controls creation of sessions that require client licenses.	Migration+ Instancing by infobases
Time	Supports getting real-time timestamps and some auxiliary functions.	Replication Migration+ Instancing by infobases
Auxiliary cluster functions	Manages cluster lock information collection.	No migration
Data Accelerator	Allows creating data copies for high-speed preparation of analytical reports. Service works together with data base copies mechanism.	Memory Disk Migration-
Event logs	Supports access to event logs.	Disk Migration- Instancing by infobases
Jobs	Starts and monitors lifetime of background and scheduled jobs.	Replication Migration+
Integration data	Ensures operation of integration services.	Instancing by infobases No migration
Cluster configuration	Stores all cluster settings.	No migration Replication
Full-text search coordination v2	The service allows you to divide storage and maintenance of the search index between cluster managers.	Migration- Instancing by infobases
Licensing	Provides software license distribution. If the cluster licensing service that had issued licenses earlier is temporarily unavailable, this service issues duplicate licenses for no longer than 20 seconds. To ensure uninterrupted license acquisition from the licensing service, the rphost and rmngr processes of 1C:Enterprise server must have rights to create, read, and modify data in the 1cv8conn.pfl file.	Migration+
Resource consumption counter monitoring	Calculates values of resource consumption indicators.	Disk Memory Migration-
Numbering	Generates unique object numbers and codes.	Replication Migration+ Instancing by infobases
Database table/field numbering	Provides unified numbering for database tables and fields. Used during database configuration updates that involve changes in database structure.	Migration+ Instancing by infobases
Session reuse	Provides an automatic pool of reused sessions for Web services, HTTP services, and OData.	Migration+
Full-text search	Performs full-text search and indexing.	Disk Migration- Instancing by infobases
Full-text search v2	The service is responsible for full-text search and indexing management: start on demand, start on a schedule, and information about the index status.	Disk Migration- Instancing by infobases
Getting a list of sessions	Allows you to get a list of current sessions using various platform features, including internal cluster features, 1C:Enterprise language objects, and administration tools.	Migration+
Custom settings	Provides access to files storing custom settings.	Migration- Instancing by infobases
OpenID provider	Stores OpenID authentication contexts.	Migration- Instancing by infobases
ODBC external data source management	Provides interaction with external databases over ODBC interface.	Memory Migration+ Instancing by infobases
External data source management using XMLA	Provides interaction with OLAP sources over XMLA interface.	Migration- Instancing by infobases
Session data	Provides storage and caching of session information, for example, information in managed application forms. Provides client license acquisition.	Disk Replication Migration+ Instancing by infobases
Speech recognition service	Enables speech recognition. Receives (downloads) speech recognition models from an external model source (a recognition server).	Disk Memory Single server
Service for managing speech recognition models	Stores speech recognition models and distributes them among other production servers.	Disk Single server
Cluster state	Contains dynamic data about cluster state and composition.	Replication No migration
Testing	Simulates user operations with 1C:Enterprise cluster.	Migration-
Transaction locks	Contains transaction locks for managed mode.	Memory Migration+ Instancing by infobases
Debug item management	Manages debugger connection to server debug items.	No migration
Background database configuration update	Performs background database restructuring. Before migrating this service between cluster managers, stop all working process. The system background job must be stopped as well. Therefore, the background update will be paused immediately after migration.	Replication Migration+ Instancing by infobases
Binary data storages	Maintains the operation of the binary data storage service.	Disk Migration-

Terms used in the table:

Disk. Resource-intensive service that causes high load on the disk subsystem.
Memory. Resource-intensive service that causes high load on CPU and RAM.
Replication. Replication between the main and reserve service instances is supported. Replication is activated whenever the fault-tolerance level of the cluster is not zero. For cluster configuration and cluster lock services, replication is activated whenever multiple working servers with selected Main server check box are registered in the cluster.
Instancing by infobases. A separate service instance is used for each infobase.
Migration between working servers:
- Migration+. Service migration between working servers is possible without any data loss.
- Migration–. Service migration between working servers is possible with some data loss.
- No migration. Service migration between working servers is impossible. Service can be located only on the computer hosting a main server of the cluster. Functionality assignment rules cannot be created for such services.
- Single server. Service migration between production servers is unavailable. The service can be located on any single production server, not only on the main server.

Cluster services are evenly distributed among working servers of the cluster by service types, infobases, and sessions.

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