HP Storage Essentials Enterprise Edition Software - Manual (Page 71)

User Guide 57
NOTE: If deactivating the IP address fails, SAP might incorrectly indicate that the instance is
“running” on this managed node. In SAP ACC 1.0, SAP assumes that the instance is running
if the virtual IP address of the instance is available, and it is not necessarily if the application
is up and running.
12. Unlock Managed Node.
The last step in the operation is for SAP ACC to unlock the managed node and allow for any
other operations to be executed on this managed node.
In the same way as with the “stop” process, the operations start from the SAP ACC server, but
the order in executing some of the process is different.
The Application Integration Software for SAP ACC has one very import change in operation
when handling a attach operation.
When receiving an attach request, the Application Integration Software must first determine if
the physical storage associated with this request is already presented to any Managed node or
not. If the storage is already presented to a managed node and the Managed node is not
accessible, the physical storage must first be un-presented from that Managed Node before it
can be presented to the requesting node.
This condition is true if the system that was running the application crashed for some reason and
is now not available. The administrator may want to re-start the application on another node, the
Application Integration Software must ensure that when the crashed server is operational again,
and this server will not have access to the physical storage.
In the event that the original owner of the physical storage is available, the Application
Integration Software cannot forcefully un-present the storage from this system, since it has no
guarantee that the application is down. In this case, the Application Integration Software must
return a failure status for the “attach” operation. The SAP Administrator would need to start the
instance on the original node, and then perform a “relocate” operation to move the application
to the new node.
Location of important log files
SAP ACC application log: Available from the SAP ACC interface by selecting the appropriate
instance and application log.
• Application Integration Software for SAP ACC: Available from the Application Integration
Software for SAP ACC by selecting the Application Log tab, or viewing the text version located
in the <installDir>\logs directory.
• HP Storage Essentials SRM: Available from the HP Storage Essentials SRM console or text
versions available in <InstallDir>\logs. Specifically the “appiq.log” and “cimom.log”
files.
• HP Systems Insight Manager: Available from the console or text versions located at
<InstallDir>\output\runnow, <installDir>\logs\mx.log, and
<InstallDir>\plugin\sedeploy\logs
• OpenSSH: Available in <installDir>\logs