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A member is represented by the table with the following fields:
``uri`` (string) is a Uniform Resource Identifier.
``status`` (string) is a string that takes one of the values below.
``alive``: a member that replies to ping-messages is ``alive`` and well.
``suspect``: if any member in the group cannot get a reply from any other member, the first member asks three other ``alive`` members to send a ping-message to the member in question. If there is no response, the latter becomes a ``suspect``.
``dead``: a ``suspect`` becomes ``dead`` after a timeout.
``left``: a member gets the ``left`` status after executing the :ref:`leave() <membership-leave>` function.
The gossip protocol guarantees that every member in the group becomes aware of any status change in two communication cycles.
``incarnation`` (number) is a value incremented every time the instance becomes a ``suspect``, ``dead``, or updates its payload.
``payload`` (table) is auxiliary data that can be used by various modules.
``timestamp`` (number) is a value of ``fiber.time64()`` which:
corresponds to the last update of ``status`` or ``incarnation``;
is always local;
does not depend on other members' clock setting.
Below is an example of the table:
tarantool> membership.myself()
---
uri: localhost:33001
status: alive
incarnation: 1
payload:
uuid: 2d00c500-2570-4019-bfcc-ab25e5096b73
timestamp: 1522427330993752
...
API reference
Below is a list of ``membership``'s common, encryption, subscription functions, and options.
Name
Use
Common functions
:ref:`init(advertise_host, port) <membership-init>`
Initialize the ``membership`` module.
:ref:`myself() <membership-myself>`
Get the member data structure of the current instance.
:ref:`get_member(uri) <membership-get-member>`
Get the member data structure for a given URI.
:ref:`members() <membership-members>`
Obtain a table with all members known to the current instance.
:ref:`pairs() <membership-pairs>`
Shorthand for ``pairs(membership.members())``.

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testing_project / Documentation: reference/reference_rock/membership — English

tarantool> membership.myself()
---
uri: localhost:33001
status: alive
incarnation: 1
payload:
uuid: 2d00c500-2570-4019-bfcc-ab25e5096b73
timestamp: 1522427330993752
...
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