1.2.9 Extended Attributes

An extended attribute is non-standard metadata that is associated with an Exascale vault or file. An extended attribute consists of an extended attribute name and an associated value. The extended attribute name is a user-defined string value. The extended attribute value can be a string value or a binary value read from a file.

In addition to user-defined extended attributes, extended attributes reserved for internal use by Exascale services and tools have names starting with a dollar sign ($). You cannot create, modify, or delete these extended attributes.

Multiple extended attributes are allowed for each Exascale vault or file. For each file or vault, the total space available for all extended attributes is 16 kilobytes. This allowance includes the extended attribute names and values, along with a small allowance for internal metadata.