Storage configuration planning
Complete all storage configuration planning tasks before you configure your system environment.
Planning the systems
Determine:
Planning the hosts
Host mapping provides a way for hosts to access specific logical units (LUs) within the storage
systems. Determine:
Planning the MDisks
To plan the managed disks (MDisks), you must complete
the following:
- If you are installing IBM Spectrum Virtualize for Public Cloudsoftware in an IBM Cloud® environment, you must purchase and configure block storage from the IBM Cloud.
- Determine whether to configure endurance or performance block storage:
- Endurance storage
-
Endurance storage is selected from a tier that features a predefined performance level. IBM Cloud supports four options for endurance storage:
- 0.25 IOPS per GB for low intensity workloads
- 2 IOPS per GB for general-purpose workloads
- 4 IOPS per GB for higher-intensity workloads
- 10 IOPS per GB for demanding workloads
- Performance storage
- Performance is a class of block storage that is designed to support high I/O applications with
that have well-defined performance requirements that cannot be accommodated by the tiers in
endurance storage. You can select the GB and a range of IOPS for the size of your storage. The following table displays the range of GB and the IOPS that is available for Performance storage:1IOPS above 6000 are only available at some data centers.
Table 1. Performance storage Size in GB Minimum IOPS Maximum IOPS 20 100 1000 40 100 2000 80 100 4000 100 100 6000 250 100 6000 500 100 6000 or 100001 1000 100 6000 or 200001 2000 - 3000 200 6000 or 400001 4000 - 7000 300 6000 or 480001 8000 - 9000 500 6000 or 480001 10000 - 12000 1000 6000 or 480001
Planning the storage pools
Necessary activities:
Planning the volumes
An individual volume is a member of one storage pool and one I/O group. The storage pool defines which MDisks provide the back-end storage that makes up the volume. The I/O group defines which nodes provide I/O access to the volume.
Consider the effect that FlashCopy®, Global Mirror, Metro Mirror, and thin-provisioned volumes have on performance. The effect depends on the type of I/O, and is calculated by using a weighting factor.