Before configuring the default Red Hat Directory Server instances, it is important to verify that the host server has the required system settings and configuration:
The system must have the required packages, patches, and kernel parameter settings.
DNS must be properly configured on the target system.
The host server must have a static IP address (IPv4 or IPv6).
This chapter covers the software and hardware requirements, operating system patches and settings, and system configurations that are necessary for Directory Server to perform well.
The requirements outlined in this chapter apply to production systems. For evaluating or prototyping Directory Server, you may choose not to meet all of these requirements.
Directory Server is supported on Red Hat Enterprise Linux 7 (64 bit).
2.1. General Hardware Requirements
Table 2.1, “Hardware Requirements Based on Number of Entries”
contains guidelines for the recommended size of the Directory Server database. They are based upon the number of entries that your organization requires. The values shown in the table assume that the entries in the LDIF file are approximately 100 bytes each and that only the recommended indices are configured (since indexing is resource-intensive).
Table 2.1. Hardware Requirements Based on Number of Entries
| Number of Entries || Database Size |
| 10,000 - 250,000 entries || 2 GB |
| 250,000 - 1,000,000 entries || 4 GB |
| 1,000,000 and more entries || 8 GB |
Make sure that the capacity of the available RAM is large enough to hold the entire size of the Directory Server database.