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As an administrative user, you can set quotas when you or update quotas for an existing project. Quotas are operational limits that prevent system capacities from being exhausted without notification. For example, to optimize cloud resources, you can control the number of gigabytes allowed for each project. You enforce quotas at the project, or tenant, level rather than at the user level. Typically, you change quotas when a project needs more than 10 volumes or 1 TB on a Compute node. The following tables describe the Compute and Block Storage service quotas:

Compute quotas

Quota	Defines the number of
Metadata Items	Metadata items allowed for each instance.
VCPUs	Instance cores allowed for each project.
Instances	Instances allowed for each project.
Injected Files	Injected files allowed for each project.
Injected File Content Bytes	Content bytes allowed for each injected file.
RAM (MB)	RAM megabytes allowed for each instance.
Floating IPs	Floating IP addresses allowed for each project.
Fixed IPs	Fixed IP addresses allowed for each project. Must be equal to or greater than the number of allowed instances.
Security Groups	Security groups allowed for each project.
Security Group Rules	Rules allowed for each security group.

Block Storage quotas

Quota	Defines the number of
Volumes	Volumes allowed for each project.
Gigabytes	Volume gigabytes allowed for each project.

Log in to the OpenStack dashboard and choose the admin project from the CURRENT PROJECT drop-down list. On the Admin tab, click the System Info category. Click the Default Quotas tab to view the default quotas for the Compute and Block Storage services.

On the Admin tab, click the Projects category. Select a project to change its quota values. In the More drop-down list, click Modify Quotas. On the Quota tab in the Edit Project window, edit quota values. Then, click Save. The dashboard does not show all possible project quotas. To view and update the quotas for a service, use the keystone command-line client. See .