Availability Guide for Change Management

Making Application Subsystem Changes Online
Availability Guide for Change Management–125506
4-17
NonStop TM/MP in the Client/Server Environment
Database Tables and Files
When configuring your NonStop TM/MP environment, you must identify all disk
volumes that will be protected by the TMF subsystem. These disk volumes are called
data volumes.
Online dumps are copies of audited files residing on data volumes. If the database is
damaged, the TMF subsystem can restore the online dump files to disk and apply the
audit-trail images to reconstruct the files.
TMF Subsystem Management Interfaces
The TMF subsystem has the following management interfaces:
•
TMFCOM—the TMF interactive command interface. TMFCOM allows
commands to be entered and responses to be received through a terminal keyboard
and monitor.
•
TMFSERVE—the TMF management programming interface. TMFSERVE
provides programmatic access to the Subsystem Programmatic Interface (SPI),
making it possible to construct management applications that monitor and control
the TMF environment.
Figure 4-4 shows the role of the TMF subsystem in the traditional Tandem transaction-
processing environment.
NonStop TM/MP in the Client/Server Environment
In the client/server environment, the TMF subsystem protects databases, keeps track of
database activity, and provides database recovery methods in exactly the same way as it
does in the traditional Tandem transaction environment. NonStop SQL/MP databases
Figure 4-4. The TMF Subsystem in a Traditional Transaction-Processing
Environment
OLTP
Software
TMF
Subsystem
Database
Log of
Transaction
Records
Transaction
Entry
(Audit trail)
Tandem NonStop System
User
terminals