Administrator Guide

Example 1
Create NAS volumes based on departments. The administrator breaks up storage and management into functional groups. In this example,
the departmental requirements are different and support the design to create NAS volumes along department lines.
• Advantages
• The NAS volumes are easier to manage because they are set up logically.
• The NAS volumes are created to match the exact needs of the department.
• Disadvantage – The NAS volumes become harder to manage if the number of departments in the organization increases.
Example 2
Group departments that have similar security requirements into NAS volumes. The administrator creates three NAS volumes: one for
UNIX, one for NTFS, and one for mixed.
• Advantages – The NAS volumes work separately between Windows and Linux.
• Disadvantage – Unwanted services could be provided to certain departments. For example, when the SMB volume is backed up
weekly for the administration and finance departments, the press and marketing departments also get backups even though they do
not require them.
Example 3
NAS volumes can be created based on a feature (snapshots, replication, NDMP backup, and so on).
• Advantages – The NAS volumes are created to match the exact needs for each feature.
• Disadvantage – User mapping is required. A user needs to choose one security style (either NTFS or UNIX) and then, based on the
security style chosen, the correct mapping for other users is set.
NAS Volumes Storage Space Terminology
Storage Manager displays storage space details for individual NAS volumes and for all NAS volumes collectively. The following table
defines terminology used in Storage Manager related to NAS volume storage space.
Term
Description
Size Maximum size of a NAS volume defined by the storage administrator
Used space Storage space occupied by writes to the NAS volume (user data and snapshots)
Reserved space A portion of a thin-provisioned NAS volume that is dedicated to the NAS volume (no other volumes can
take the space). The amount of reserved space is specified by the storage administrator. Reserved
space is used before unreserved space.
Unreserved space A portion of a thin-provisioned NAS volume that is not reserved (other volumes can take the space). To
calculate the amount of unreserved space for a NAS volume, use: (NAS volume size) – (NAS volume
reserved space)
Unused space Storage space that is physically currently available for the NAS volume. To calculate the amount of
available space for a NAS volume, use: (unused NAS volume reserved space) + (NAS volume
unreserved space
Overcommitted space Storage space allotted to a thin-provisioned volume over and above the actually available physical
capacity of the NAS pool. To calculate the amount of overcommitted space for a NAS volume, use:
(Total volume space) – (NAS pool capacity)
With thin provisioning, storage space is consumed only when data is physically written to the NAS
volume, not when the NAS volume is initially allocated. More storage space can be allocated to the NAS
volumes than has been allocated in the NAS pool itself.
Snapshot space Storage space occupied by snapshots of a NAS volume
Data reduction saving Storage space reclaimed as a result of data reduction processing
Managing the Storage Profile for a NAS Cluster or Pool
Storage Center Storage Profiles control how Storage Center manages volume data. The selected Storage Profile dictates which storage
tier accepts initial writes, as well as how data progression moves pages between storage tiers to balance performance and cost.
For more information about Storage Profiles, see the Storage Manager Administrator’s Guide.
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FluidFS Administration