Latency-aware live migration for multitenant database platforms
AssigneeNEC Laboratories America, Inc.
InventorsSean Barker, Yun Chi, Hyun Jin Moon, Vahit Hakan Hacigumus
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Abstract
Methods and systems for database migration from a multitenant database include taking a snapshot of an original database to be migrated with a hot backup process, such that the database is still capable of answering queries during the hot backup process; maintaining a query log of all queries to the tenant database after the hot backup process begins; initializing a new database at a target server using the snapshot; replaying the query log synchronize the new database with the original database; and answering new queries with the new database and not the original database.
Claims9
A method for migration from a multitenant database, comprising:
- taking a snapshot of an original database to be migrated with a hot backup process, such that the database is still capable of answering queries during the hot backup process;
- maintaining a query log of all queries to the tenant database after the hot backup process begins;
- initializing a new database at a target server using the snapshot;
- replaying the query log synchronize the new database with the original database;
- and
- answering new queries with the new database and not the original database.
A multitenant database system, comprising:
- a multitenant database configured to take a snapshot of an original tenant database to be migrated with a hot backup process, such that the original tenant database is still capable of answering queries during the hot backup process, to maintain a query log of all queries to the original tenant database using a processor after the hot backup process begins, to initialize a migrated tenant database using a received snapshot, and to replay a received query log to synchronize the migrated tenant database with an original tenant database.
Dependencies are inferred from the claim text.