# Migration: Information Gathering

+ Version of your on-premises database
+ Version of your `TiDB Cloud` database
+ For on-premises database, the architecture of the database (replication、`single-primary`、`multi-primary`、sharded tables、multitenant、non-Multitenant、singleton、cluster、and so on)
+ On-premises database character set

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+ To determine which migration methods might be applicable to your migration scenario, gather the following information.
+ Database version of your source database.
+ The architecture of the database
  + replication
  + `single-primary`
  + `multi-primary`
  + sharded tables
  + Multitenant
  + non-Multitenant
  + singleton
  + cluster
+ Your source database host platform and endian format.