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[#2749] document default HA+MT

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Andrei Pavel
2023-03-28 19:38:59 +03:00
parent 84672202c2
commit c86d074590
9 changed files with 25 additions and 33 deletions
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18
doc/sphinx/arm/hooks-ha.rst
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@@ -1645,28 +1645,28 @@ HA+MT operation:
- ``enable-multi-threading`` - enables or disables multi-threading HA peer
communication (HA+MT). Kea core multi-threading must be enabled for HA+MT to
operate. When ``false`` (the default), the server operates as in earlier
versions, relying on ``kea-ctrl-agent`` and using single-threaded HTTP client
processing.
operate. When ``false``, the server relies on ``kea-ctrl-agent`` for
communication with its peer, and uses single-threaded HTTP client processing.
The default is ``true``.
- ``http-dedicated-listener`` - enables or disables the creation of a dedicated,
internal HTTP listener through which the server receives HA messages from its
peers. The internal listener replaces the role of ``kea-ctrl-agent`` traffic,
allowing peers to send their HA commands directly to each other. The listener
listens on the peer's ``url``. When ``false`` (the default), the server
listens on the peer's ``url``. When ``false``, the server
relies on ``kea-ctrl-agent``. This parameter has been provided largely for
flexibility and testing; running HA+MT without dedicated listeners enabled
will substantially limit HA throughput.
will substantially limit HA throughput. The default is ``true``.
- ``http-listener-threads`` - indicates the maximum number of threads the
dedicated listener should use. A value of 0 instructs the server to use the
dedicated listener should use. A value of ``0`` instructs the server to use the
same number of threads that the Kea core is using for DHCP multi-threading.
The default is 0.
The default is ``0``.
- ``http-client-threads`` - indicates the maximum number of threads that should
be used to send HA messages to its peers. A value of 0 instructs the server
be used to send HA messages to its peers. A value of ``0`` instructs the server
to use the same number of threads that the Kea core is using for DHCP
multi-threading. The default is 0.
multi-threading. The default is ``0``.
These parameters are grouped together under a map element, ``multi-threading``,
as illustrated below: