Figure 7-2 shows an example of the ProtecTIER Meta Data Planner. Based on information  that is shown in Figure 7-2, the requirements for the metadata are as follows: Important:  Always assign the full RAID array capacity to the LUNs that are used for  ProtecTIER metadata and user data. The only exception to this rule is the  Cluster  database  file system of 1 GB, which  does not require a separate RAID group . Availability:  The ProtecTIER Planner tool is an IBM internal tool that is available to trained  ProtecTIER specialists. The core component for any capacity sizing and subsequent configuration effort is the  ProtecTIER Planner. The primary methodologies to accurately size the required capacity and  configure the disk and file system infrastructure depend on the correct usage of this tool.  The primary function of the ProtecTIER Planner enables field engineers to perform key  activities when they size and configure the physical disk systems that are connected as  back-end storage of the ProtecTIER server. The process starts at a high level, where a  general capacity sizing is performed, based on key variables in the organization’s  environment.  Another aspect of the sizing process is to understand how many metadata and user data file  systems are required based on disk technologies and RAID configurations to ensure correct  performance. The ProtecTIER Performance Planner aids in this process.  7.1.1 ProtecTIER Planner tool GLYPH<SM590000> Four metadata file systems (including the 1 GB file system for the Cluster database). GLYPH<SM590000> The minimum sizes required for file systems are: 1 GB, 1042 GB, 1049 GB, and 650 GB. Figure 7-2 Example of ProtecTIER Meta Data Planner 102  IBM ProtecTIER Implementation and Best Practices Guide