The
performance of applications at the
local clustered
system can
be limited by the performance of the storage systems at the remote
system.
Your setup must meet the following requirements to maximize the number of I/O operations that
applications can run on Global Mirror
volumes:
- The Global Mirror volumes at the remote system must be in dedicated
storage pools that only contain other Global Mirror
volumes.
- Configure storage systems to support the Global Mirror workload that is required of them. The
following guidelines can be used to fulfill this requirement:
- Dedicate storage systems to only Global Mirror volumes.
- Configure the storage system to provide sufficient quality of service for the disks that are
being used by Global Mirror operations.
- Ensure that physical disks are not shared between Global Mirror volumes and
other I/O operations. For example, do not split an individual array.
- For Global Mirror storage pools, use MDisks with the same characteristics.
For example, use MDisks that have the same RAID level, physical disk count, and disk speed. This
requirement is important to maintain performance when you use the Global Mirror feature.
You must
provision the storage systems
that are attached to the remote system to accommodate the following
items:
- The peak application workload to the Global Mirror volumes.
- The specified background copy level.
- All I/O operations that run on the remote system.