This topic provides the considerations for setting up a zone for
metadata servers and the LUNs in the system storage pool.
It is not necessary for metadata servers to access the user storage
pools. Although data access is coordinated by the metadata servers, data operations
are always performed by a client. The metadata servers only need access to
the volumes in the system storage pool, and should be zoned to limit their
access to only those volumes.
Considerations
SAN File System allows you to zone
the metadata servers and clients so that they access only the
LUNs that they need during LUN discovery and normal operation.
The metadata servers need access only to the system storage pools. They
do not need access to the user storage pools. Configure the metadata server
zone to encompass only those LUNs associated with the system storage pool.
All system storage pool volumes must be seen by all metadata servers and
only by metadata servers.
No user storage pool volumes should be seen by the metadata servers.
Zone the metadata servers so that the number of paths from each metadata
server to each LUN is limited to two. This maximizes the number of dual-access
LUNs that are accessible to the cluster.