Dell PowerStore 1200T EMC PowerStore Configuring NFS - Page 21

5 More file system features This chapter contains the following information: Topics: • File system quotas File system quotas You can track and limit drive space consumption by configuring quotas for file systems at the file system or directory level. You can enable or disable quotas at any time, but it is recommended that you enable or disable them during non-peak production hours to avoid impacting file system operations. NOTE: You cannot enable quotas for read-only file systems. NOTE: Quotas are not supported in VMware file systems. Types of quotas There are three types of quotas you can put on a file system. Table 2. Quota types Type User Quotas Tree Quota Description Limits the amount of storage that is consumed by an individual user storing data on the file system. Tree quotas limit the total amount of storage that is consumed on a specific directory tree. You can use tree quotas to: ● Set storage limits on a project basis. For example, you can establish tree quotas for a project directory that has multiple users sharing and creating files in it. ● Track directory usage by setting the tree quota hard and soft limits to 0 (zero). NOTE: If you change the limits for a tree quota, the changes take effect immediately without disrupting file system operations. User quota on a quota tree Limits the amount of storage that is consumed by an individual user storing data on the quota tree. Quota Limits Table 3. Hard and Soft Limits Type Descriptions Hard A hard limit is an absolute limit on storage usage. If a hard limit is reached for a user quota on a file system or quota tree, the user cannot write data to the file system or tree until more space becomes available. If a hard limit is reached for a quota tree, no user can write data to the tree until more space becomes available. Soft limit A soft limit is a preferred limit on storage usage. The user is allowed to use space until a grace period has been reached. More file system features 21