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+---
+layout: page
+title: Spectrum 2
+---
+
+Spectrum2 manager is tool for managing Spectrum 2 instances. It can manage local instances and also do some basic management of remote instances.
+
+## Configuration
+
+Spectrum 2 manager normally checks all configuration files (.cfg files) in /etc/spectrum2/transports and do some for Spectrum 2 instances declared there.
+This directory can be changed by changing Spectrum 2 manager configuration file, which is stored in /etc/spectrum2/spectrum_manager.cfg by default.
+
+### spectrum_manager.cfg - [service] section:
+
+Key | Type | Default | Description
+----|------|---------|------------
+config_directory | string | /etc/spectrum2/spectrum_manager.cfg | Directory where Spectrum2 configuration files are stored.
+
+## Managing all local instances
+
+### spectrum2_manager start
+
+Starts all Spectrum2 instances according to config files defined in config_directory. This command can be called repeatedly. It has no effect on already running instances.
+
+### spectrum2_manager stop
+
+Stops all Spectrum2 instances according to config files defined in config_directory.
+
+### spectrum2_manager status
+
+Checks if all local instances (defined in config files in config_directory) are running. Returns 0 if all instances are running. If some instances are not running, returns 3.
+
+### Managing particular Spectrum 2 instance
+
+Spectrum 2 manager can be also used to manage one particular Spectrum 2 instance. For example following command starts Spectrum 2 instance with JID "icq.domain.tld":
+
+	spectrum2_manager icq.domain.tld start
+
+Following command stops that instance:
+
+	spectrum2_manager icq.domain.tld stop
+
+## Querying Spectrum 2 instance
+
+You can get various information from running Spectrum 2 instance. To check all information you can get from Spectrum 2 instance with JID "icq.domain.tld, just run:
+
+	spectrum2_manager icq.domain.tld help
+
+You will get something similar to this list of available commands:
+
+	General:
+		status - shows instance status
+		reload - Reloads config file
+		uptime - returns ptime in seconds
+	Users:
+		online_users - returns list of all online users
+		online_users_count - number of online users
+		online_users_per_backend - shows online users per backends
+		has_online_user <bare_JID> - returns 1 if user is online
+		register <bare_JID> <legacyName> <password> - registers the new user
+		unregister <bare_JID> - unregisters existing user
+	Messages:
+		messages_from_xmpp - get number of messages received from XMPP users
+		messages_to_xmpp - get number of messages sent to XMPP users
+	Backends:
+		backends_count - number of active backends
+		crashed_backends - returns IDs of crashed backends
+		crashed_backends_count - returns number of crashed backends
+	Memory:
+		res_memory - Total RESident memory spectrum2 and its backends use in KB
+		shr_memory - Total SHaRed memory spectrum2 backends share together in KB
+		used_memory - (res_memory - shr_memory)
+		average_memory_per_user - (memory_used_without_any_user - res_memory)
+		res_memory_per_backend - RESident memory used by backends in KB
+		shr_memory_per_backend - SHaRed memory used by backends in KB
+		used_memory_per_backend - (res_memory - shr_memory) per backend
+		average_memory_per_user_per_backend - (memory_used_without_any_user - res_memory) per backend
+
+