Dell EMC Unisphere storage management is a web-based solution that provides an interface for storage management and configuration tasks. The configuration depends on performance and capacity needs, preferred type of server connectivity, performance in terms of IOPS and MB/s, and future growth needs for both performance and capacity. This section provides guidance and best practices for storage management and configuration.
Dell EMC recommends that you use fewer storage pools within Unity storage to reduce complexity and increase flexibility. However, you might want to configure multiple storage pools to do the following:
Storage pools must maintain free capacity to operate properly. By default, Unity storage raises an alert if a storage pool has less than 30 percent free capacity. It also automatically begins to invalidate snapshots and replication sessions if the storage pool has less than 5 percent free capacity. Dell EMC recommends that storage pools always have at least 10 percent free capacity.
Dell EMC storage systems use multiple drive types, with varying capacities and performance levels, and attempt to match data with the optimal drive type based on storage pools. Typically, mission-critical data is stored on high-performance drives, while less-critical data is moved to high-capacity drives.
While every environment is unique, an OLTP workload generally consists of small, random reads and writes. The required number of IOPS primarily determines the sizing of a storage system that services an OLTP workload. Different drive types have different performance capabilities. Faster-spinning drives can provide more IOPS with lower latency than slower-spinning drives. For best performance, Dell EMC recommends SSDs for OLTP workloads.
The following factors affect drive selection:
You can calculate the number of required disks as follows, depending on the target IOPS requirements:
Number of disks = (Read IOPS + [Write IOPS x RAID performance overhead]) / IOPS per disk
FC zoning enables the partitioning of the FC fabric into multiple subsets called zones. A zone includes FC initiators and targets, and enables communication between the initiators and targets.
Best practices for setting the I/O paths include:
Create a server cluster for high availability and map the volumes to the server cluster. Map the volumes by using Storage Center Console or Enterprise Manager Console.
For optimal performance and better monitoring resolution, Dell EMC recommends that you: