HP-UX 11i June 2002 Release Notes

HP-UX 11i Operating Environment Applications
HP-UX 11i Enterprise Operating Environment (EOE)
Chapter 6
105
Documentation
See “New Version of Journaled File System (JFS)” on page 196 for information about
new features in JFS 3.3.
For more information on JFS 3.3 and OnLineJFS 3.3, see the following books:
• HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System
Administrator’s Guide
• Managing Systems and Workgroups: A Guide for HP-UX System Administrators
Both are available on the Web at:
http://docs.hp.com/
MirrorDisk/UX
Prior to HP-UX 11i, Logical Volume Manager (LVM) mirroring supported the
non-Shared Logical Volume Manager (non-SLVM) environment only. In other words, the
disks were only accessible by a single system and could not be shared by multiple hosts.
Beginning with HP-UX 11i, LVM mirroring now automatically enables SLVM for a
two-node environment supporting both non-SLVM and SLVM environments. All LVM
systems can mirror their data on disk, and the mirrored copy of the data can also be
accessed from a two-node cluster.
Impact
There have been no changes to the LVM command interface to enable LVM mirroring in
the SLVM environment. Therefore, you must still use the lvcreate and the lvextend
commands to create mirrored logical volumes. The only software code changes were
made to the HP-UX kernel and do not affect any LVM manpages, or the MirrorDisk/UX
version B.11.11 products, which are:
• B5403BA MirrorDisk/UX License for Workstations
• B2491BA MirrorDisk/UX License for Servers
To make use of the LVM mirroring capability, you may want to add extra disks to the
volume group to mirror the data.
Compatibility Issues
There is no need to make any changes to scripts or makefiles to make use of the LVM
mirroring capability in the SLVM environment.
NOTE SLVM mirroring is NOT supported for striped logical volumes and is ONLY supported in
a two-node environment. SLVM mirroring does not support spared disks in a shared
volume group. You should disable sparing by using the pvchange -z n <path>
command on shared volume disks.
Process Resource Manager (PRM)
Process Resource Manager (PRM) enables system administrators to guarantee CPU, real
memory, and disk bandwidth resources to users and applications on the system.