HP-UX HB v13.00 Ch-15 - Serviceguard

HP-UX Handbook – Rev 13.00 Page 96 (of 108)
Chapter 15 Serviceguard
October 29, 2013
 More information about SNOR you can find at: SLVM Online Volume Reconfiguration
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01914684/c01914684.pdf
Comparison of Volume Managers
The following table summarizes some of the advantages and disadvantages of the volume
managers that are currently available.
Product
Advantages
Tradeoffs
Logical Volume Manager (LVM)
• Software is provided with all
versions of HP-UX.
• Provides up to 3-way mirroring
using optional Mirrordisk/UX
software.
• Dynamic multipathing (DMP) is
active by default as of HP-UX
11i v3.
• 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 VxVM
Mirrordisk/UX
• Software mirroring
• free on 11i v3
• Lacks extended features of
VxVM/CVM
Shared Logical Volume Manager
(SLVM)
• Provided free with SGeRAC for
multi-node access to RAC data
• Supports up to 16 nodes in
shared read/write mode for each
cluster
• Supports exclusive activation
• Supports multiple heartbeat
subnets.
• Online node configuration with
activated shared volume groups
(using specific SLVM kernel and
Serviceguard revisions)
• Lacks the flexibility and extended
features of VxVM.
• Limited mirroring support
Base-VxVM
• Software is supplied free with
HP-UX 11i releases.
• Java-based administration
through graphical user interface.
• Striping (RAID-0) support.
• Concatenation.
• Online resizing of volumes.
• Supports multiple heartbeat
subnets.
• Cannot be used for a cluster
lock
• root/boot disk supported only on
VxVM 3.5 or later, on HP-UX 11i
• Supports only exclusive read or
write activation
• Package delays are possible, due
to lengthy vxdg import at the time
the package is started or failed
over
VERITAS Volume Manager Full
VxVM product
B9116AA (VxVM 3.5)
B9116BA (11.31 VxVM 4.1)
B9116CA (11.23 VxVM 5.0)
B9116CB (11.31 VxVM 5.00.01-
.03)
• Disk group configuration from
any node.
• DMP for active/active storage
devices.
• Supports exclusive activation.
• Hot relocation and unrelocation
of failed subdisks
• Requires purchase of additional
license
• Cannot be used for a cluster lock
• Using the disk as a root/boot
disk is only supported for VxVM
3.5 or
later, when installed on HP-UX 11i.