HP-UX 11i Version 1.6 Release Notes

HP-UX Features
MC/ServiceGuard
Chapter 3
53
MC/ServiceGuard
MC/ServiceGuard (Multi-Computer/ServiceGuard) is a specialized facility for protecting
mission critical applications from a wide variety of hardware and software failures.
Summary of Change
MC/ServiceGuard version A.11.14.01 is released in HP-UX 11i v1.6. This version differs
from A.11.14 in that some features are not included, and some are included with
limitations.
Details of Change
Support for up to four cluster nodes rather than 16 in A.11.14.
This is the first release on IPF.
No changes in system administration tasks from A.11.14 to A.11.14.01.
The following are not supported on SG A.11.14.01:
• ServiceGuard SAM interface is not included.
• Rolling upgrades from any platform
• PA-RISC platform
• Virtual Partitions (vPARs)
• Advanced Tape Services
• Mixed IPF and PA-RISC nodes within a cluster
• Clusters larger than 4 nodes
• VxVM and CVM disk groups
• FC, FDDI, Token Ring, ATM, 100VG, and APA
HP-UX 11i v1.6 does not support FDDI, Token Ring and ATM and hence they cannot be
used for SG Heartbeat; SG cannot perform local switching for them, and cmquerycl does
not detect them. In addition, FC (Fibre Channel) networking and 100VG is not be
supported by HP-UX 11i v1.6, so by default, they won’t be supported by SG.
In addition, the shared library directory structure is modified. The shared library
locations are now in hpux32 or hpux64 depending on whether the libraries are 32 bits or
64 bits.
MC/ServiceGuard is an ISU product. Here are some dependencies on system features
that are changing:
• DLPI - ServiceGuard uses DLPI primitives to do network probing and determine
link failure.
• Streams/Transport - SG depends on Transport Layer and the sockets API heavily for
IP related functions and communications among daemons.
• libsnet - Provides calls for managing relocatable IP addresses.