HP-UX 11i September 2001 Release Notes

HP-UX 11i Operating Environment Applications

HP-UX 11i Enterprise Operating Environment (new at 11i original release)

Chapter 4

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 is also

accessible 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) (updated for September 2001)

Process Resource Manager (PRM) enablessystem administrators to guarantee CPU, real

memory, and disk bandwidth resources to users and applications on the system.

NOTE Process Resource Manager and HP-UX Workload Manager both make use of the PRM

API. Consequently, only one of the products should be used at a time. (See also “HP-UX

Workload Manager (updated for September 2001)” on page 76.)

Version C.02.00

updated for

September 2001:

HP PRM Version C.02.00 provides the following:

• new memory features

— in-kernel memory management

— dedicated memory for PRM groups

— proportional overachievement for PRM groups

— memory isolation - PRM uses the prm2D memory manager to optionally specify a

group’s memory resource to be restricted by use from other groups and processes

on the system.