System for highly available transaction recovery for transaction processing systems
First Claim
1. A transaction recovery system comprising:
- a first server instance having a first transaction recovery service, the first transaction recovery service owning a first transaction log corresponding to said first server;
a second server instance having a second transaction recovery service, the second transaction recovery service owning a second transaction log corresponding to said second server; and
a shared memory, the first transaction log and the second transaction log residing on the shared memory, the first transaction recovery service configured to failover migrate from said first server instance to said second server instance if said first server fails [goes down], said second server instance configured to coordinate transactions from the first transaction log upon the failover migration of the first transaction recovery service.
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Accused Products
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.
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Citations
32 Claims
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1. A transaction recovery system comprising:
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a first server instance having a first transaction recovery service, the first transaction recovery service owning a first transaction log corresponding to said first server;
a second server instance having a second transaction recovery service, the second transaction recovery service owning a second transaction log corresponding to said second server; and
a shared memory, the first transaction log and the second transaction log residing on the shared memory, the first transaction recovery service configured to failover migrate from said first server instance to said second server instance if said first server fails [goes down], said second server instance configured to coordinate transactions from the first transaction log upon the failover migration of the first transaction recovery service. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for recovering transactions comprising:
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a primary server having a transaction log, wherein a first transaction recovery service maintains ownership of the transaction log ; and
a backup server, wherein upon a failure of the primary server, the first transaction recovery service is configured to failover migrate from the primary server to the back-up server, the backup server operable to read the transaction log and perform recovery on behalf of the failed primary server while the backup server hosts the first transaction recovery service. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A cluster of servers configured to provide transaction recovery comprising:
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a primary server having a transaction log, wherein a transaction recovery service maintains ownership of the 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 transaction recovery service configured to failover migrate from the primary server to the back-up server upon failure of the primary server, the backup server operable to read the transaction log and perform recovery on behalf of the failed primary server while the backup server hosts the first transaction recovery service. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification