RDF/IMP and IMPX System Management Manual (RDF 1.4+)

Preparing the RDF Environment
HP NonStop RDF/IMP and IMPX System Management Manual—524388-001
2-11
Configuring an SMF Environment on the Primary
System
•
Map many virtual disks to a single physical disk
Create SMF pools where each is comprised of a single physical disk and create
SMF virtual disks from these pools. In this configuration, all the files on a given
virtual disk reside on one physical disk allowing you to have a very large physical
disk volume subdivided into a number of smaller logical volumes. In this way it is
possible to have multiple partitions of a file residing on a single physical volume,
with each partition of the file stored on a different logical volume.
Both of these configurations are supported by RDF. There are some restrictions when
using SMF on the backup system which are described in detail later in this section.
Configuring an SMF Environment on the Primary System
When configuring an SMF environment on an RDF primary system, make sure that
SMF catalog files are not replicated by RDF to the backup system. The SMF catalogs
on the primary and backup systems must remain independent of each other. There are
three ways to do so:
•
Place the SMF catalog on a primary system volume that is not protected by RDF.
The extractor ignores any audit generated by disks outside the RDF configuration,
and hence will not replicate any changes to the SMF catalog on the primary
system. With this option, you can store the catalog in either the default SMF
catalog subvolume or your own subvolume.
•
Place the SMF catalog in the default SMF catalog subvolume on a volume that is
protected by RDF.
The extractor automatically filters out changes to the SMF catalog if the catalog is
in the default SMF catalog subvolume. If you store the catalog in your own
subvolume, the extractor will try to replicate changes to the catalog, which could
have an adverse affect on RDF and any SMF catalogs with the same subvolume
name on the backup system.
•
Place the SMF catalog in a subvolume that is explicitly excluded from RDF
protection (the INCLUDE and EXCLUDE clauses are described in Section 11,
Subvolume- and File-Level Replication).
Configuring an SMF Environment on the Backup RDF System
RDF supports the replication to SMF logical volumes on the backup system, with the
following restrictions:
1. When replicating to an SMF logical volume, the logical volume must belong to an
SMF pool that contains 15 or fewer physical volumes, hence each updater can
apply audit to up to 15 physical disks.
2. The RDF/IMP product limits the total number of physical or virtual UPDATE
volumes to 255. RDF/IMPX has no such limitation, other than the limit of 255