System for Highly Available Transaction Recovery for Transaction Processing Systems

Abstract

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.

1 . A system for recovering transactions comprising:
 a primary server having a transaction log, and   a backup server, wherein upon a failure of the primary server, the backup server is operable to read the transaction log and perform recovery on behalf of the failed primary server.   
   
   
       2 . The system of  claim 1 , wherein the primary server and backup server reside in a cluster. 
   
   
       3 . The system of  claim 1 , wherein transaction recovery is accomplished automatically. 
   
   
       4 . The system of  claim 1 , wherein transaction recovery is accomplished manually. 
   
   
       5 . The system of  claim 1 , wherein transaction recovery is accomplished manually by an administrator. 
   
   
       6 . The system of  claim 1 , further comprising a migratable framework and a transaction recovery service configured to receive support from the migratable service framework for manual migration. 
   
   
       7 . The system of  claim 1 , further comprising a migratable framework and a transaction recovery service configured to receive support from the migratable service framework for automatic migration. 
   
   
       8 . A cluster of servers configured to provide transaction recovery comprising:
 a primary server having a transaction log, the primary server and transaction log residing in the cluster; and   a backup server residing in the cluster and having access to the transaction log, the backup server operable to read the transaction log and perform recovery on behalf of the failed primary server.   
   
   
       9 . The cluster of servers of  claim 8 , wherein transaction recovery is accomplished automatically. 
   
   
       10 . The cluster of servers of  claim 8 , wherein transaction recovery is accomplished manually by an administrator. 
   
   
       11 . The cluster of servers of  claim 8 , further comprising a migratable framework residing in the cluster and a transaction recovery service configured to receive support from the migratable service framework for manual migration. 
   
   
       12 . The cluster of servers of  claim 8 , further comprising a migratable framework residing in the cluster and a transaction recovery service configured to receive support from the migratable service framework for automatic migration. 
   
   
       13 . A computer readable medium including code to implement:
 a primary server having a transaction log, and   a backup server, wherein upon a failure of the primary server, the backup server is operable to read the transaction log and perform recovery on behalf of the failed primary server.   
   
   
       14 . The computer readable medium of  claim 13 , wherein the primary server and backup server reside in a cluster. 
   
   
       15 . The computer readable medium of  claim 13 , wherein transaction recovery is accomplished automatically. 
   
   
       16 . The computer readable medium of  claim 13 , wherein transaction recovery is accomplished manually. 
   
   
       17 . The computer readable medium of  claim 13 , wherein transaction recovery is accomplished manually by an administrator. 
   
   
       18 . The computer readable medium of  claim 13 , further comprising a migratable framework and a transaction recovery service configured to receive support from the migratable service framework for manual migration. 
   
   
       19 . The computer readable medium of  claim 13 , further comprising a migratable framework and a transaction recovery service configured to receive support from the migratable service framework for automatic migration.