ExpressCluster X 2.0 for Windows Reference Guide - Nec

Understanding registry synchronization resources
History Files Store Folder: Folder to keep the writing requests to the remote disk
in files
Kernel Queue Size: Size to keep the writing request to the remote disk in
the kernel space memory
Application Queue Size: Size to keep the writing request to the remote disk in
the user space memory
Thread Timeout: Timeout when it became unable to transfer data form
the kernel queue to the application queue
Max. size of history file size (MB): Upper limit of amount of files stored in history files
store folder.
Upper Bound of Communication Band (KB/sec.):
Upper limit of communication band on Mirror
Connect.
Understanding registry synchronization resources
Dependencies of registry synchronization resources
By default, this function depends on the following group resource types.
Group resource type
Floating IP resource
Virtual IP resource
Virtual computer name resource
Disk resource
Mirror disk resource
Hybrid disk resource
Print spooler resource
Registry synchronization resources
Registry
server1 failed
server1 server2
Failover
Registry
server1 server2
Registry keys to be synchronized at failover can be configured. When the content in a registry
key set as synchronization target is updated while registry synchronization resource is active, the
updated content is reflected to the registry of the Failover Target Server.
The following describes how a registry synchronization resource synchronizes registry:
3. When there is a registry synchronization resource in a failover group, update of a registry
key that has been configured is monitored when the registry synchronization resource is
activated.
4. When the registry key update is detected, what is in the registry key is saved as a file in the
local disk. Then the file is delivered to each Failover Target Server.
5. The servers that received the file keep it in their local disks. If a failover occurs and registry
synchronization resource is activated in a server that received the file, the content of the file
is restored in the corresponding registry key.
Section II Resource details
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