Administrator Guide

Table 4. Metro node OS AccessAnywhere features (continued)
Feature Description and considerations
Global Visibility The presentation of a volume from one metro node cluster
where the physical storage for the volume is provided by a
remote metro node cluster.
Considerations: Use Global Visibility for AccessAnywhere
collaboration between locations. The cluster without local
storage for the volume will use its local cache to service I/O
but non-cached operations incur remote latencies to write or
read the data.
Non-disruptive upgrade (NDU)
Metro node management server software and metro node OS can be upgraded without disruption.
Metro node hardware can be replaced, the engine count in a cluster increased, and a metro node Local can be expanded to
metro node Metro without disruption.
Metro node never has to be completely shut down.
Storage, application, and host upgrades
Metro node enables the easy addition or removal of storage, applications, and hosts.
When metro node encapsulates back-end storage, the block-level nature of the coherent cache allows the upgrade of storage,
applications, and hosts.
You can configure metro node so that all devices within metro node have uniform access to all storage blocks.
Software upgrades
Metro node is fully redundant for:
● Ports
● Paths
● Nodes
This redundancy allows GeoSynchrony on metro node Local and Metro to be upgraded without interrupting host access to
storage, it does not require service window or application disruption.
NOTE:
You must upgrade the metro node management server software before upgrading GeoSynchrony. Management
server upgrades are non-disruptive.
Simple support matrix
Dell EMC publishes storage array interoperability information in a Simple Support Matrix available on Dell EMC Online Support.
This information details tested, compatible combinations of storage hardware and applications that metro node supports. The
Simple Support Matrix can be located at:
https://www.dell.com/support
Software and upgrade
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