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767 B
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24 lines
767 B
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SQL database
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~~~~~~~~~~~~
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Most OpenStack services use an SQL database to store information. The
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database typically runs on the controller node. The procedures in this
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guide use MariaDB or MySQL depending on the distribution. OpenStack
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services also support other SQL databases including
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`PostgreSQL <https://www.postgresql.org/>`__.
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.. note::
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If you see ``Too many connections`` or ``Too many open files``
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error log messages on OpenStack services, verify that maximum number of
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connection settings are well applied to your environment.
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In MariaDB, you may also need to change
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`open_files_limit <https://mariadb.com/kb/en/library/server-system-variables/#open_files_limit>`__
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configuration.
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.. toctree::
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:glob:
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environment-sql-database-*
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