DB2 pureScale问题诊断

1.DB2 cluster services includes three major components:

• Cluster manager: Tivoli SA MP, which includes Reliable Scalable Cluster Technology (RSCT)

• Shared clustered file system: IBM General Parallel File System (GPFS)

• DB2 cluster administration: DB2 commands and administration views for managing and monitoring the cluster

2. DB2 cluster services

DB2 cluster services provide essential infrastructure for the shared data instance to be highly available and to provide automatic failover and restart as soon as the instance has been created.

DB2 cluster elements are representations of entities that are monitored and whose status changes are managed by DB2 cluster services. For the purposes of this tutorial, we will address three types of DB2 cluster elements:
• Hosts: A host can be a physical machine, LPAR (Logical Partition of a physical machine), or a virtual machine.
• DB2 members: A DB2 member is the core processing engine and normally resides on its home host. The home host of a DB2 member is the host name that was provided as the member's location when the member was added to the DB2 shared data instance. A DB2 member has single home host. DB2 members can accept client  connections only when they are running on their home host.
• Cluster caching facilities (CFs): The cluster caching facility (CF) is a software application managed by DB2 cluster services that provides internal operational services for a DB2 shared data instance.

(未完待续)