HP Hierarchical Storage Management for OpenVMS, Version 4.3

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Software

Product

Description

PRODUCT NAME: HP Hierarchical Storage Management SPD 46.38.24

for OpenVMS Version 4.3

PRODUCT DESCRIPTION

HP Hierarchical Storage Management (HSM) for Open-

VMS is a layered software product that extends the

OpenVMS ﬁle system to allow efﬁcient management of

infrequently accessed (dormant) data. HSM migrates

dormant data from online storage to less expensive

nearline or ofﬂine (shelf) storage. The movement of

dormant data to shelf storage is called shelving. The

shelved data can be automatically and transparently re-

turned to online storage when needed. HSM will also

save valuable backup time, since the shelved data is

already located on secure, removable media.

HSM for OpenVMS Operation

HSM operates in Basic or Plus Mode. Basic mode uses

its own media manager and qualiﬁes a limited number

of device types. Plus mode allows the use of advanced

storage devices. If used for remote tape devices, Plus

Mode requires the Remote Device Facility (RDF) soft-

ware. See the OPTIONAL SOFTWARE section for de-

tails.

New and frequently accessed ﬁles remain online while

older and less active ﬁles are automatically, or manually,

shelved in accordance with user-deﬁned policies.

The directory information and ﬁle headers for shelved

ﬁles are maintained on online storage devices while

the data itself is on the shelf device. When access is

needed to the shelved data, HSM automatically returns

it to online storage. The ﬁ le attributes may be viewed

and modiﬁed without bringing the data back online.

Control over the execution of the shelving process is ei-

ther explicit or implicit. Explicit shelving is a process that

has been started in response to a DCL command. The

command can be issued directly to the OpenVMS Op-

erating System or executed in an OpenVMS command

procedure. Implicit shelving is a process that has been

started by HSM in response to a trigger event or policy.

The transparent management of HSM is set through

HSM policies which:

• Specify which ﬁles are or are not to be shelved

• Set a high water mark on the online storage to auto-

matically trigger shelving of dormant data

• Set a low water mark as a space recovered goal

when your ﬁles are shelved

• Specify which processes should cause automatic un-

shelving

HSM policies use predeﬁned selection algorithms or

scripts containing HSM-speciﬁc commands to shelve or

unshelve ﬁles in response to trigger events. Trigger

events are situations that, when set by an HSM policy,

cause HSM to move ﬁles to shelf storage. Examples of

speciﬁc trigger events are listed below:

• Volume occupancy full

• Disk quota exceeded

• High water mark reached

• Scheduled policy execution

Trigger events, used in conjunction with appropriately

designed selection criteria, free up enough online disk

space to satisfy the policy goal.

October 2006

Summary of content (6 pages)

PAGE 1
Software Product Description PRODUCT NAME: HP Hierarchical Storage Management for OpenVMS Version 4.3 PRODUCT DESCRIPTION HP Hierarchical Storage Management (HSM) for OpenVMS is a layered software product that extends the OpenVMS file system to allow efficient management of infrequently accessed (dormant) data. HSM migrates dormant data from online storage to less expensive nearline or offline (shelf) storage. The movement of dormant data to shelf storage is called shelving.
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HP Hierarchical Storage Management for OpenVMS Version 4.3 SPD 46.38.24 The selection criteria include definitions that determine the appropriate files to be shelved in response to the need for shelving. Examples of selection criteria include: If you have a question about a particular device, contact customer support.
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HP Hierarchical Storage Management for OpenVMS Version 4.3 SPD 46.38.24 CLUSTER ENVIRONMENT Table 1 This layered product is fully supported when installed on any valid and licensed VMScluster configuration without restrictions. The HARDWARE REQUIREMENTS section details any special hardware required by this product. Disk Space Requirements (Block Cluster Size = 1) Item Blocks Needed The VMScluster Software Product Description (SPD 29.78.
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HP Hierarchical Storage Management for OpenVMS Version 4.3 SPD 46.38.24 • If HSM is used with Archive Backup System, ABS, then HSM will use the media manager installed by ABS as part of the ABS product installation. For more information on the OpenVMS License Management Facility, refer to the OpenVMS Operating System Software Product Description or the License Management Facility manual of the OpenVMS Operating System documentation set.
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HP Hierarchical Storage Management for OpenVMS Version 4.3 SPD 46.38.24 This software is furnished under the licensing provisions of HP’s standard terms and conditions. For more information about HP’s licensing terms and policies, contact your HP account representative or distributor. SOFTWARE PRODUCT SERVICES A variety of service options are available from HP. For more information, contact your local HP account representative or distributor. This information is also available on www.hp.com/hps/software.
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