Skynet/misc_nixos-mailserver
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Move indexDir option to the mailserver scope

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This option has been initially in the mailserver.fullTextSearch
scope. However, this option modifies the location of all index files
of dovecot and not only those used by the full text search feature. It
is then more relevant to have this option in the mailserver top level
scope.

Moreover, the default option has been changed to null in order to keep
existing index files where they are: changing the index location means
recreating all index files. The fts documentation however recommend to
change this default location when enabling the fts feature.
This commit is contained in:
Antoine Eiche 2021-03-11 20:53:38 +01:00
parent 66e8baa6f2
commit 93330c5453
4 changed files with 34 additions and 17 deletions
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14
docs/fts.rst
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@ -38,9 +38,17 @@ issues a search query, so latency will be high.
Resource requirements
~~~~~~~~~~~~~~~~~~~~~~~~
Indices can take more disk space than the emails themselves. By default, they
are kept in a different location (``/var/lib/dovecot/fts_xapian``) than emails
so that you can backup emails without indices.
Indices created by the full text search feature can take more disk
space than the emails themselves. By default, they are kept in the
emails location. When enabling the full text search feature, it is
recommended to move indices in a different location, such as
(``/var/lib/docecot/indices/%d/%n``) by using the option
``mailserver.indexDir``.
.. warning::
When the value of the ``indexDir`` option is changed, all dovecot
indices needs to be recreated: clients would need to resynchronize.
Indexation itself is rather resouces intensive, in CPU, and for emails with
large headers, in memory as well. Initial indexation of existing emails can take