Tip

How to add capacity to a network-attached storage system

1. Network-attached storage configuration change

Is your customer's network-attached storage (NAS) system physically capable of adding more devices? It would have to have open slots for the space and cabling to install another drawer of disks, probably coming from the NAS vendor. Adding capacity in this way will require a configuration change and may involve some interruption of service (but not with all implementations). You must investigate the particular NAS product.

2. Add a NAS node

If a NAS system can be arranged as a cluster, you could add another node with associated capacity. This is not available for all NAS systems and the installation and configuration requires some planning. This could provide some availability features, such as failover, depending on the vendor implementation. Also, this provides an opportunity to scale not only capacity but performance. Adding capacity alone may create a performance bottleneck, so the performance requirements need to be considered before just adding capacity.

  • Add a second NAS and NAS aggregator

    A second NAS system could be installed and then a NAS aggregator could be put in front of the NAS systems so that they appear to clients as a single NAS system. This requires the installation and configuration of both systems and will probably require an outage during the aggregator installation. This is an interesting approach in that once the aggregator (sometimes called network file virtualization)

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