Managing Serviceguard 12th Edition, March 2006

Understanding Serviceguard Software Components
Volume Managers for Data Storage
Chapter 3122
Table 3-5 Pros and Cons of Volume Managers with Serviceguard
Product Advantages Tradeoffs
Logical Volume
Manager (LVM)
• Software is provided with all
versions of HP-UX.
• Provides up to 3-way mirroring
using optional mirror disk UX
software.
• Supports up to 16 nodes in a
Serviceguard cluster
• Supports using PV links for
multipl.e access paths to disk
storage
• Supports exclusive activation as
well as read-only activation from
multiple nodes
• Can be used to configure a
cluster lock disk
• Supports multiple heartbeat
subnets; the one with the faster
failover time is used to re-form
the cluster.
• Lacks flexibility and
extended features of some
other volume managers
• PV links are active/standby
only, with one link active at
a time
Mirrordisk/UX • Software mirroring
• Lower cost solution
• Lacks extended features of
other volume managers