HP Volume Shadowing for OpenVMS |
Preparing to Use Volume Shadowing |
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Licensing Volume Shadowing for OpenVMS
Volume shadowing licenses are available in two options:
Both options work on the same systen or in an OpenVMS Cluster that contains both Alpha and VAX computers.
After licensing the OpenVMS operating system by registering a OpenVMS Product Authorization Key (PAK), you must license Volume Shadowing for OpenVMS with a separate volume shadowing PAK. The PAK provides information that defines the Volume Shadowing for OpenVMS license contract you have with HP. Obtain a PAK from your HP sales representative.
When you enter information from the PAK into the online LICENSE database, the OpenVMS License Management Facility (LMF) authorizes the use of volume shadowing.
If you have a per disk license, you must register and activate a license for each shadowed disk. Starting with Volume Shadowing for OpenVMS Version 7.1, a license check for each disk that is shadowed using the per-disk volume shadowing license is included. Per-disk volume shadowing licenses apply to full shadow set members only. When the number of shadow set members exceeds the number of per-disk licenses for five minutes, shadowing issues an OPCOM warning message. You can have this message also sent to an e-mail account by defining the system logical SHADOW_SERVER$MAIL_NOTIFICATION to a standard OpenVMS Mail address or an internet address. An invalid address will not generate a failure message.
Shadowing issues notification again 59 minutes after noncompliant shadow set members are mounted. One minute later, shadow set members are automatically removed from shadow sets until the number of members equals the number of licenses. Members are removed systematically from multiple-member shadow sets; single-member shadow sets will not be affected.
Disks that are the target of a copy operation do not consume a license unit until the copy is complete. Thus it is always possible to obtain a copy of a single-member shadow set.
If you are using capacity licenses, you must register and activate a license for Volume Shadowing for OpenVMS on each node that mounts a shadow set, including satellites in an OpenVMS Cluster system. If you do not register and activate nodes or disks that will use volume shadowing, subsequent shadow set mount operations will not succeed and will display the error messages like the one in Nodes Not Registered to Use Volume Shadowing.
For more information about the License Management Facility, refer to the OpenVMS Operating System Software Product Description (SPD 25.01.xx ).
You can also consult the OpenVMS License Management Utility Manual.
After you register the volume shadowing PAK, you must set the shadowing parameters on each node where you want to enable shadowing.
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