Hardware manual

Chapter 2 Inside Mac OS X Server 51
High Availability
Mac OS X Server features that promote high availability include:
 Open Directory LDAP replication, including the authentication services of Open
Directory Password Server and Kerberos KDC (see the Open Directory administration
guide)
 Automatic restart after application, system, or power failures
 Disk space monitoring (see the command-line administration guide for information
about log-rolling scripts and the diskspacemonitor tool)
 Software RAID, or mirroring (see Disk Utility online help)
 Journaled HFS disks (see the command-line administration guide for how to use disk
journaling)
 Remote server monitoring (see the getting started guide for information about
server administration tools)
 Link aggregation (see the high availability administration guide). On some
computers you can improve physical connection availability by using link
aggregation. Link aggregation configures several physical network links as a single
logical link to improve the capacity and availability of network connections.
High-Performance Computing
Mac OS X Server offers a high-performance, cost-effective approach to the
computationally intensive processing needed for genetic research, video production,
or other high-bandwidth computing.
For example, Xgrid computational service lets you achieve supercomputer performance
levels by distributing computations over collections of dedicated or shared Mac OS X
computers. The Xgrid cluster controller provides centralized access to the distributed
computing pool, referred to as a computational cluster. The Xgrid administration guide
describes how to set up and manage computational clustering.
“Computational Clustering” on page 24 provides other examples of Mac OS X Server’s
support for high-performance computing.