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``heartbeat_rate`` (double) -- rate of sending round messages, in seconds. Setting ``heartbeat_rate`` to X does not mean that every member will be checked every X seconds, instead X is the protocol speed. Protocol period depends on member count and heartbeat_rate. Default = 1.
``ack_timeout`` (double) -- time in seconds after which a ping is considered to be unacknowledged. Default = 30.
``gc_mode`` (enum) -- dead member collection mode.
If ``gc_mode == 'off'`` then SWIM never removes dead members from the member table (though users may remove them with :ref:`swim_object:remove_member() <swim-remove_member>`), and SWIM will continue to ping them as if they were alive.
If ``gc_mode == 'on'`` then SWIM removes dead members from the member table after one round.
Default = ``'on'``.
``uri`` (string or number) -- either an ``'ip:port'`` address, or just a port number (if ip is omitted then 127.0.0.1 is assumed). If ``port == 0``, then the kernel will select any free port for the IP address.
``uuid`` (string or cdata struct tt_uuid) -- a value which should be unique among SWIM instances. Users may choose any value but the recommendation is: use :ref:`box.cfg.instance_uuid <cfg_replication-instance_uuid>`, the Tarantool instance's UUID.
All the ``cfg`` components are dynamic -- ``swim_object:cfg()`` may be called more than once. If it is not being called for the first time and a component is not specified, then the component retains its previous value. If it is being called for the first time then uri and uuid are mandatory, since a SWIM instance cannot operate without URI and UUID.
``swim_object:cfg()`` is atomic -- if there is an error, then nothing changes.
true if configuration succeeds
nil, ``err`` if an error occurred. ``err`` is an error object
swim_object:cfg({heartbeat_rate = 0.5})
After ``swim_object:cfg()``, all other ``swim_object`` methods are callable.
Expose all non-nil components of the read-only table which was set up or changed by :ref:`swim_object:cfg() <swim-object_cfg>`.
tarantool> swim_object.cfg
---
- gc_mode: off
uri: 3333
uuid: 00000000-0000-1000-8000-000000000001
...
Delete a SWIM instance immediately. Its memory is freed, its member table entry is deleted, and it can no longer be used. Other members will treat this member as 'dead'.
After ``swim_object:delete()`` any attempt to use the deleted instance will cause an exception to be thrown.
none, this method does not fail
Example: ``swim_object:delete()``
Return false if a SWIM instance was created via :ref:`swim.new() <swim-new>` without an optional ``cfg`` argument, and was not configured with :ref:`swim_object:cfg() <swim-object_cfg>`. Otherwise return true.
boolean result, true if configured, otherwise false
Example: ``swim_object:is_configured()``
Return the size of the member table. It will be at least 1 because the "self" member is included.
integer size
Example: ``swim_object:size()``
Leave the cluster.
This is a graceful equivalent of :ref:`swim_object:delete() <swim-delete>` -- the instance is deleted, but before deletion it sends to each member in its member table a message, that this instance has left the cluster, and should not be considered dead.
Other instances will mark such a member in their tables as 'left', and drop it after one round of dissemination.
Consequences to the caller are the same as after ``swim_object:delete()`` -- the instance is no longer usable, and an error will be thrown if there is an attempt to use it.
none, the method does not fail

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testing_project / Documentation: reference/reference_lua/swim — English

tarantool> swim_object.cfg
---
- gc_mode: off
uri: 3333
uuid: 00000000-0000-1000-8000-000000000001
...
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