PostgreSQL is a relational database favored by developers and enterprises. Its features such as rich data types, geospatial workloads and strong scalability make it popular. However, in the process of enterprises using PostgreSQL to host applications, due to the ubiquity of scenarios such as cloud migration, cross-cloud, off-cloud, cross-computer room migration, cross-region migration, database version upgrade, expansion and contraction, etc., PostgreSQL needs to be implemented. migrate.
During the PostgreSQL migration process, migration time, data accuracy, and business downtime requirements are key factors affecting the success of the migration. Therefore, it is crucial to choose an appropriate migration tool to provide efficient, safe, and accurate migration capabilities.
1. Traditional Migration Solution
Currently, common PostgreSQL migration solutions are backup and recovery, pg_dump/pg_restore, and these two migration solutions generally have the following problems:
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Long downtime, the above solution usually requires that during the database migration, the business stops service, and the service downtime is usually as high as several hours/days, which is a great challenge to the business. Especially when the migration is difficult, the migration is usually repeated many times, and the service shutdown time is even more uncontrollable.
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The reliability is not high, and the client tool does not provide the ability to observe, diagnose and repair the migration process, which is prone to errors.
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Data accuracy is difficult to guarantee. Since such tools do not provide corresponding quality detection capabilities, it is generally difficult to guarantee the quality of migrated data.
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The migration of large data volumes is a challenge. Due to its insufficient performance and disaster recovery capabilities, it cannot well support the migration of large data volumes and large tables.
2. Non-stop business migration solution
In order to solve the problems that users may face during the PostgreSQL migration process, NineData, a cloud-native intelligent data management platform under Nine Zhang Arithmetic, has launched the PostgreSQL business non-stop data migration capability. NineData realizes fully automated structure migration and full data migration, and also provides the ability to migrate changed data. This capability can monitor the changed data in the source PostgreSQL in real time, and copy the changed data to the target PostgreSQL in real time after the full migration is completed, thereby realizing the dynamic replication of the source/target PostgreSQL. During the PostgreSQL data migration process, the business can provide services normally without stopping the service. Finally, the business can choose the corresponding time point to switch to the target PostgreSQL according to the needs. Please refer to the figure below for the specific process.
Portal: https://www.ninedata.cloud/dbmigration
In addition to providing non-stop business migration capabilities, PostgreSQL provided by NineData also has the following capabilities:
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The ability to migrate large amounts of data or large tables, based on various technical capabilities such as intelligent sharding, dynamic batch accumulation, concurrent migration, and table-level breakpoint resume transfer, provides strong migration capabilities.
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For structure and data consistency comparison, NineData provides PostgreSQL's structure comparison and data comparison capabilities, which can perform efficient consistency comparison, quickly identify difference objects or data, and provide corresponding corrected SQL, quickly correct and repair difference content, and effectively guarantee migration data quality.
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Observable and intervenable capabilities. NineData provides detailed migration status, progress, and detailed information. When migration exceptions occur, it will provide a variety of diagnostic and repair capabilities to help you ensure task stability. At the same time, it provides migration flow limiting capability, and you can customize the migration speed according to business needs to ensure the stability of PostgreSQL.
3. Start fully automated migration in one minute
Although it provides a relatively powerful PostgreSQL migration capability, NineData is very easy to use. It only takes 1 minute to complete the task configuration, that is, the data migration process can be completely automated. Let's take a look at the configuration process of the entire task:
1. Configure the replication task
Based on the above operations, PostgreSQL data migration can be easily and reliably completed. After completing the PostgreSQL task configuration, NineData will automatically perform structure migration, full data migration and incremental data replication.
After the data migration is completed, you can also configure the corresponding structure comparison and data comparison to verify the structure consistency and data consistency. The configuration demonstration of the comparison task is shown below.
2. Structural comparison
3. Full data comparison
4. Write at the end
In addition to PostgreSQL, NineData also supports the migration and replication of dozens of common databases. In addition to the SAAS mode, NineData also provides an enterprise-specific cluster mode to meet the highest requirements of enterprises for data security and compliance. At present, NineData has completed large-scale application practice in many industries such as operators, finance, manufacturing, real estate, and e-commerce. Portal: https://www.ninedata.cloud/dbmigration