HP Serviceguard Extended Distance Cluster for Linux A.01.01 Release Notes, Third Edition, May 2009

1 HP Serviceguard Extended Distance Cluster for Linux
A.01.01 Release Notes
Announcements
The HP Serviceguard Extended Distance Cluster (XDC) for Linux is a product that
allows an HP Serviceguard for Linux cluster to operate across two separate sites
providing disaster tolerance for applications. XDC uses the Linux Multiple Device
(MD) driver’s software RAID capability and its associated tool, mdadm, to replicate
data across those two sites. With Software RAID, two disks (or disk sets) are configured
so that the same data is written on both disks as one "write transaction". So if data from
one disk set is lost, or if one disk set is rendered unavailable, the data is always available
from the second disk set.
HP Serviceguard Extended Distance Cluster (XDC) for Linux A.01.01 is available for
use with HP ProLiant servers and HP Integrity servers running Red Hat 4, Red Hat 5,
and Novell SUSE Linux Enterprise Server 10 through the following product number:
• T2346BA - license, media, and documentation
Licenses for HP Serviceguard for Linux for the nodes in the cluster must be purchased
separately.
What’s In this Version
An extended distance cluster (also known as extended campus cluster) is a Serviceguard
cluster that has alternate nodes located in different data centers separated by some
distance. Using Linux MD, Serviceguard XDC ensures high availability of data.
Following are the key features of this product:
• HP Serviceguard A.11.18 or A.11.19 is required for Extended Distance Cluster
A.01.01. HP Serviceguard A.11.16 is required for Extended Distance Cluster A.01.00.
• Support for Legacy and Modular packages.
HP Serviceguard A.11.18 and A.11.19 supports a new process for configuring
packages. Packages created using this method are referred to as Modular packages.
Packages created using previous versions of Serviceguard are referred to as Legacy
packages. For more information on Modular packages, see Managing Serviceguard
Seventh Edition.
Announcements 7