What are the general guidelines for the Tiers?

The following are the high-level guidelines for the tiers:

·         Tier 1:  Build on high speed (15,000 RPM disks), this is the fastest tier available and is appropriate for PROD applications/databases with high workload demands and high counts of concurrent users.

·         Tier 2:  Built on medium performance (10,000 RPM disks), this tier is appropriate for most workloads of PROD and non-PROD applications/databases with moderate workload demands and counts of concurrent users.  The bulk of the storage at KP, along with the bulk of the applications/DB instances live here.

·         Tier 3:  Build on modest performance (7,200 RPM disks), this tier is appropriate for very low use PROD workloads and general non-PROD use for applications with very light workload demands and concurrent user counts.  This storage is low cost to Corporate and works well for bulk storage of lightly used data, backup space, and executables.  

·     Tier 3 is also a good choice for lower (non-PROD) environments where functionality testing is the only requirement and there are low numbers of concurrent users. 

The exception however would be non-prod environments that are used during detailed load testing, where there is a need to extrapolate the performance results to help size for eventual PROD deployments.

·         Tier 0: Within a VMAX, there are ESD drives (which most companies call Solid State Disk) which are essentially large memory modules. This is Tier 0. Super high performance, with super high cost. The highest of the high workload requirements usually go here. We have a bit of Tier 0 around KP, but it is not currently used for PROD or NON-PROD.

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