IBM®
System Storage®
DS8000® series storage systems are designed to be fast and manage heavy I/O.
About this task
A DS8000 series
storage system can be configured in RAID 5 and RAID 10 arrays. The
quantity of disk units in an array is fixed. Stripe or segment sizes
are set automatically. You cannot tune cache for a DS8000 series storage system; for example,
you cannot disable cache for the LUNs that are used for the server
database. The inability to tune cache is usually not a problem because
these systems typically have large amounts of cache.
Procedure
For best performance, follow these guidelines:
- Place the IBM Spectrum Protect database,
active log, archive log, and disk storage pools on separate extent
pools.
This arrangement uses more storage, but achieves
better performance.
- Distribute the server components over as many ranks as
possible. Ranks are on different device adapter pairs.
- Minimize other applications that are sharing the ranks
that IBM Spectrum Protect uses.
- Use as many adapters as possible to access LUNs.
- If you are using a DS8000 series
storage system for multiple IBM Spectrum Protect servers,
put all the server databases on one set of ranks. Put all the storage
pools for the servers on another set of ranks.
- Test and monitor the results for the disk system configuration
in your environment.