Installation guide

Chapter 2. System Requirements
Before configuring the default Red Hat Directory Server 8.2 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.
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. It also includes
information on a Directory Server tool, dsktune, which is useful in identifying required patches and
system settings for Directory Server.
NOTE
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 4 and 5 (x86 and x86_64).
2.1. General Hardware Requirements
Red Hat recommends minimum of 4 GB of disk space for a typical installation, while directories with more
than a million entries can require 8 GB or more. Red Hat suggests 1 GB of RAM.
Table 2.1, “Hardware Requirements Based on Number of Entries” contains guidelines for Directory
Server disk space and memory requirements based upon on the number of entries that your
organization requires. T he values shown here 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 Required Memory Disk Space
10,000 - 250,000 entries 1 GB 2 GB
250,000 - 1,000,000 entries 1 GB 4 GB
1,000,000 + entries 1 GB 8 GB
2.1.1. Required JDK
Red Hat Directory Server 8.2 requires Sun JRE 1.6.0 or OpenJDK 1.6.0 for Red Hat Enterprise Linux 4
and 5.
IMPORTANT
It is not possible to manage instances of Directory Server older than 8.1 (which used JDK 1.5)
with the 8.2 Directory Server Console because they are using different JDK versions.
Chapter 2. System Requirements
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