Data migration method, system, device and product
A data and technology to be migrated, applied in the computer field, can solve problems such as transaction interruption, downtime, and high performance requirements, and achieve the effect of non-interrupted migration
Active Publication Date: 2021-10-01
ALIBABA CLOUD COMPUTING LTD +1
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However, during the online migration process, there may be problems with downtime or transaction interruption caused by the migration
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[0038] In the existing technology, with the development of distributed database technology, the distributed database system has become more and more complex, and any change to any node will affect the stability of the overall system. However, as the actual application requirements increase, the problems to be solved also increase. For example, if you need to solve the load balancing problem, you need to migrate the database nodes. In order to reduce the adverse impact on the normal operation of the distributed database system during data migration, online migration is usually adopted.
[0039] There are many existing online migration solutions, such as Squall, MgCrab, ProRea and other solutions. Various problems exist in the online migration process using these solutions. For example, Squall relies on the lock of each data partition to ensure the consistency of migrated data, which will cause relatively large synchronization overhead; MgCrab is limited to Deterministic datab...
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The embodiment of the invention provides a data migration method, system, device and product. The method comprises the following steps of transmitting data information of a to-be-migrated object on a first node at a first moment and incremental data related to the to-be-migrated object after the first moment to a second node, so that the second node migrates the object to be migrated, when the migration progress parameter of the to-be-migrated object meets a preset condition, starting a dual-operation working mode, enabling the unsubmitted first node transaction for the to-be-migrated object to transmit incremental data generated during execution to a second node, and if the second node transaction for the to-be-migrated object exists, routing the second node transaction to the second node. According to the technical scheme, the dual-operation working mode is started, the first node can continue to execute the unsubmitted first node transaction for the to-be-migrated object, the second node transaction for accessing the to-be-migrated object is routed to the corresponding target object in the second node to be executed, and online non-interruption migration of the to-be-migrated object is achieved.
Description
technical field [0001] This application relates to the field of computer technology, in particular to data migration methods, systems, equipment and products. Background technique [0002] With the development of distributed database technology, the scale of distributed databases is getting larger and larger, and problems such as load tilt may occur, resulting in the need for database node migration. [0003] In the migration job of the existing distributed database, in order not to affect the normal execution of the transaction, the way of online migration is usually adopted. However, during the online migration process, there may be problems of downtime or transaction interruption caused by the migration. Although there are some migration solutions that can achieve online migration without interrupting transactions, the migration process has high requirements on the performance of the distributed database system and will cause large data overhead. Contents of the invent...
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IPC IPC(8): G06F16/18G06F16/21G06F16/27
CPCG06F16/1815G06F16/214G06F16/27
Inventor 康俊彬蔡乐李飞飞周星璇
Owner ALIBABA CLOUD COMPUTING LTD