Installation manual

CLI Storage-Management Guide 12-1
Chapter 12
Policy for Balancing Capacity
Namespace policy uses file migration and replication to balance the usage of various
back-end filers. This chapter explains how to configure policies for managing free
space. Use this chapter to
• show policy parameters,
• add share farms (groups of shares) to a namespace,
• configure capacity balancing for the share farm,
• create schedules for rules to follow,
• pause all policy rules in a volume (perhaps on a schedule),
• drain all files off of a share or share farm, and/or
• remove all policy configuration from a namespace or volume.
The final sections discuss the side-effects of file and directory migrations, particularly
in multi-protocol (CIFS and NFS) namespaces.
Direct volumes, which contain no metadata, do not support any policy. This chapter is
relevant to managed volumes only.
The policies described in this chapter are indiscriminate about the types of files
replicated and migrated; they are focused on usage levels at the back end. There are
other policies that you can use to select files and migrate them to one or more
back-end filers, share farms, or classes of storage. The next chapter describes how to
define a fileset to select a group of files for management. The chapter after that
explains how to define rules for migrating filesets. Skip ahead to configure file-based
policies.