[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-01。"],[[["\u003cp\u003eDatabase Migration Service supports homogeneous migrations to both pre-existing destination instances and new instances it creates during job configuration.\u003c/p\u003e\n"],["\u003cp\u003eThe service can create a new destination database instance for you as part of the migration job creation.\u003c/p\u003e\n"],["\u003cp\u003eYou also have the option to create your destination database outside of the service, which is beneficial when using infrastructure-as-code tools.\u003c/p\u003e\n"],["\u003cp\u003eMigrating to pre existing destination instances comes with some limitations that should be taken into account.\u003c/p\u003e\n"],["\u003cp\u003eThere are specific guides available for creating migration jobs to new instances and to existing instances, that are made outside of Database Migration Service.\u003c/p\u003e\n"]]],[],null,["# Migration job creation\n\n\u003cbr /\u003e\n\nMySQL \\| [PostgreSQL](/database-migration/docs/postgres/create-migration-job-intro \"View this page for the PostgreSQL version of Database Migration Service.\") \\| [PostgreSQL to AlloyDB](/database-migration/docs/postgresql-to-alloydb/create-migration-job-intro \"View this page for the PostgreSQL to AlloyDB version of Database Migration Service.\")\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\nThis page describes the migration jobs available in Database Migration Service with\nhomogeneous migrations: for pre-existing destination instances, and ones that\nDatabase Migration Service creates on your behalf during the migration job configuration.\n\nDestination databases created by Database Migration Service\n-----------------------------------------------------------\n\nIn most migration scenarios, Database Migration Service creates a new destination database\ninstance for you as a part of the migration job creation flow. If you want\nDatabase Migration Service to create the destination database for you,\nfollow the guidance in\n[Create a migration job to a new destination instance](/database-migration/docs/mysql/create-migration-job).\n\nDestination databases created outside Database Migration Service\n----------------------------------------------------------------\n\nYou can create your destination database instance outside of\nDatabase Migration Service before you configure the migration job.\nThis approach is especially useful when you plan to utilize Terraform or other\ninfrastructure as code tools to manage your infrastructure.\n\nThere are certain limitations that you should\nconsider when you want to migrate to a destination instance\ncreated outside of Database Migration Service. For more information, see\n[Known Limitations](/database-migration/docs/mysql/known-limitations#existing-instance-limitations).\n\nIf you want to migrate to a destination database created outside of\nDatabase Migration Service, follow the guidance in\n[Create a migration job to an existing destination instance](/database-migration/docs/mysql/create-migration-job-existing-instance)."]]
