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 amount 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 guarantee 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