A highly available transaction recovery service migration system in
accordance with one embodiment of the present invention implements a
server's Transaction Recovery Service (TRS) as a migratable service. In
one embodiment of the present invention, the TRS is a server instance or
software module implemented in JAVA. The TRS migrates to an available
server that resides in the same cluster as the failed server. The
migrated TRS obtains the TLOG of the failed server, reads the transaction
log, and performs transaction recovery on behalf of the failed server.
The migration may occur manually or automatically on a migratable
services framework. The TRS of the failed server migrates back in a fail
back operation once the failed primary server is restarted. Failback
operation may occur whether recovery is completed or not. This expedites
recovery and improves availability of the failed server thereby
preserving the efficiency of the network and other servers.