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Notes on using the Redis session handler

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Requested by https://github.com/nextcloud/docker/pull/1364#issuecomment-765472103

Signed-off-by: Mike Griego <mike@griegocentral.com>
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Michael Griego
2021-03-20 13:16:24 -05:00
committed by Mike Griego
parent 2846110eb1
commit e1e1487f86
1 changed files with 17 additions and 0 deletions
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admin_manual/configuration_server/caching_configuration.rst
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@@ -131,6 +131,23 @@ You might need to restart apache for the changes to take effect::
Redis is very configurable; consult `the Redis documentation
<http://redis.io/documentation>`_ to learn more.
**Using the Redis session handler:** If you are using Redis for locking and/or caching,
you may also wish to use Redis for session management. Redis can be used for centralized
session management across multiple Nextcloud application servers, unlike the standard
`files` handler. If you use the Redis handler, though, you *MUST* ensure that session
locking is enabled. As of this writing, the Redis session handler does *NOT* enable
session locking by default, which can lead to session corruption in some Nextcloud apps
that make heavy use of session writes such as Talk. In addition, even when session locking
is enabled, if the application fails to acquire a lock, the Redis session handler does not
currently return an error. Adding the following settings in your `php.ini` file will
prevent session corruption when using Redis as your session handler: ::
redis.session.locking_enabled=1
redis.session.lock_retries=-1
redis.session.lock_wait_time=10000
More information on configuration of phpredis session handler can be found on the
`PhpRedis GitHub page <https://github.com/phpredis/phpredis>`_
Memcached
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