53 lines
2.7 KiB
ReStructuredText
53 lines
2.7 KiB
ReStructuredText
======
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Limits
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======
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Accounts may be pre-configured with a set of thresholds (or limits) to
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manage capacity and prevent abuse of the system. The system recognizes
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*absolute limits*. Absolute limits are fixed. Limits are configured by
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operators and may differ from one deployment of the OpenStack Compute service
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to another. Please contact your provider to determine the limits that
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apply to your account. Your provider may be able to adjust your
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account's limits if they are too low. Also see the API Reference for
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`Limits <http://developer.openstack.org/api-ref/compute/#limits-limits>`__.
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Absolute limits
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~~~~~~~~~~~~~~~
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Absolute limits are specified as name/value pairs. The name of the
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absolute limit uniquely identifies the limit within a deployment. Please
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consult your provider for an exhaustive list of absolute limits names. An
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absolute limit value is always specified as an integer. The name of the
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absolute limit determines the unit type of the integer value. For
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example, the name maxServerMeta implies that the value is in terms of
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server metadata items.
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**Table: Sample absolute limits**
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+-------------------+-------------------+------------------------------------+
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| Name | Value | Description |
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+-------------------+-------------------+------------------------------------+
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| maxTotalRAMSize | 51200 | Maximum total amount of RAM (MB) |
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+-------------------+-------------------+------------------------------------+
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| maxServerMeta | 5 | Maximum number of metadata items |
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| | | associated with a server. |
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+-------------------+-------------------+------------------------------------+
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| maxImageMeta | 5 | Maximum number of metadata items |
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| | | associated with an image. |
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+-------------------+-------------------+------------------------------------+
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| maxPersonality | 5 | The maximum number of file |
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| | | path/content pairs that can be |
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| | | supplied on server build. |
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+-------------------+-------------------+------------------------------------+
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| maxPersonalitySize| 10240 | The maximum size, in bytes, for |
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| | | each personality file. |
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+-------------------+-------------------+------------------------------------+
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Determine limits programmatically
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Applications can programmatically determine current account limits. For
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information, see
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`Limits <http://developer.openstack.org/api-ref/compute/#limits-limits>`__.
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