Using quotas in Netapp

using quotas in Netapp. You can use quotas to limit resource usage, to provide notification when resource usage reaches specific levels, or to track resource usage.

You specify a quota for the following reasons:

• To limit the amount of disk space or the number of files that can be used by a user or group, or that can be contained by a qtree
• To track the amount of disk space or the number of files used by a user, group, or qtree, without imposing a limit
• To warn users when their disk usage or file usage is high

Overview of the quota process

Quotas can be soft or hard. Soft quotas cause Data ONTAP to send a notification when specified thresholds are exceeded, and hard quotas prevent a write operation from succeeding when specified thresholds are exceeded.

When Data ONTAP receives a request to write to a volume, it checks to see whether quotas are activated for that volume. If so, Data ONTAP determines whether any quota for that volume (and, if the write is to a qtree, for that qtree) would be exceeded by performing the write operation. If any hard quota is exceeded, the write operation fails, and a quota notification is sent. If any soft quota is exceeded, the write operation succeeds, and a quota notification is sent.

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