Invention Grant
- Patent Title: Method and apparatus for replicated transaction consistency
- Patent Title (中): 复制事务一致性的方法和装置
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Application No.: US918686Application Date: 1997-08-21
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Publication No.: US6012059APublication Date: 2000-01-04
- Inventor: Marie-Anne Neimat , Kurt Shoens , Oded Shmueli
- Applicant: Marie-Anne Neimat , Kurt Shoens , Oded Shmueli
- Applicant Address: CA Menlo Park
- Assignee: Dataxel Corporation
- Current Assignee: Dataxel Corporation
- Current Assignee Address: CA Menlo Park
- Main IPC: G06F17/30
- IPC: G06F17/30
Abstract:
Local transactions are run at replication sites while receiving and tracking replication packages from primary sites. If a package coming in from a primary site updates data that a local transaction used, the data is considered stale and the local transaction is restarted. When the replication site wishes to commit (e.g., update data at the primary sites), a special dummy marker is submitted and committed. The marker comprises a dummy transaction that updates a piece of data at the primary site private to the replication site. The local site waits for the dummy transaction in the stream of replication packages sent from the primary site. Once the dummy transaction is received, the replication site is assured that any subsequent replication packages from the primary site will not affect the local transaction. If the replication packages received before the marker do not affect data items referenced during the local transaction, the local transaction commits.
Public/Granted literature
- US4227830A Ancillary off-shore column located near a sea-bed working column or platform Public/Granted day:1980-10-14
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