Administrator Guide

Figure 8. NAS Reserve
Table 10. NAS Reserve
Callout Description
1 NAS storage space
Space allocated for storing user data as needed through various structures (volumes, snapshots, thin
provisioning, replicas, containers, SMB/NFS, quotas, and local users and groups)
2 NAS reserve
Amount of available storage space allocated to the NAS cluster for storing internal data and user data. This
data includes:
• SMB/NFS protocols – SMB shares provide users a way to share les and data across a Windows network,
while NFS exports provide users a way of sharing les and data across UNIX networks. NFS clients can
only mount exported directories.
• Local users and groups – Individual accounts from which users can access SMB/NFS shares. These
accounts can be grouped so that they share the same access permissions.
• Quotas – Dene how storage space on a NAS container is allocated among users and groups of users.
• Security – Volume-level and group-level access controls for NAS containers.
You can specify the total size of the NAS reserve and NAS container space, and the system will automatically add the required
internal capacity. The system deducts a certain amount of the NAS reserve for internal use. The exact amount of internal space
varies by conguration (see Table 11. Minimum and Maximum NAS Reserve Capacities), but it is roughly calculated as a xed amount
of space for each controller pair, plus approximately 0.5 percent of the total NAS reserve.
The minimum and maximum capacities for the NAS reserve vary based on the cluster’s conguration. You can increase the size of
the NAS reserve as your NAS storage space requirements increase. However, you cannot decrease the size of the NAS reserve.
Table 11. Minimum and Maximum NAS Reserve Capacities
Cluster Conguration Minimum NAS Reserve Maximum NAS Reserve
2 controllers 512GB 510TB
4 controllers 1024GB 510TB
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Architecture Fundamentals