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Checking Whether the Destination Database Has Sufficient Storage Space

MySQL Migration

Table 1 Checking whether the destination database has sufficient storage space

Check Item	Whether the destination database has sufficient storage space
Description	Check whether the destination database has sufficient storage space. If storage space is insufficient, the migration will fail.
Failure Cause and Handling Suggestion	Failure cause: This item cannot be checked because the source database fails to be connected. Handling suggestion: Check whether the source database is connected.
	Failure cause: Insufficient user permissions Handling suggestion: Check whether the database user permissions meet the migration requirements.
	Failure cause: The destination database does not have sufficient storage space (at least 2.5 times the size of the source database). Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes. NOTE: It is recommended that the size of the destination database disk be set to the smaller value of the following two values: 2.5 times the size of the data to be migrated in the source database. The size of the data to be migrated in the source database plus 200 GB.
	Failure cause: An internal error occurs. Handling suggestion: Contact technical support.

PostgreSQL Synchronization

Table 2 Checking whether the destination database has sufficient storage space

Check Item	Whether the destination database has sufficient storage space
Description	Check whether the destination database has sufficient storage space. If storage space is insufficient, the synchronization will fail.
Failure Cause and Handling Suggestion	Failure cause: This item cannot be checked because the source database fails to be connected. Handling suggestion: Check whether the source database is connected.
	Failure cause: The destination database does not have sufficient storage space (at least 1.5 times the size of the source database). Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes. NOTE: It is recommended that the size of the destination database disk be set to the smaller value of the following two values: 1.5 times the size of the data to be migrated in the source database. The size of the data to be migrated in the source database plus 200 GB.
	Failure cause: An internal error occurs. Handling suggestion: Contact technical support.

Migration from MongoDB to DDS

Table 3 Checking whether the destination database has sufficient storage space

Check Item	Whether the destination database has sufficient storage space
Description	Check whether the destination database has sufficient storage space. If storage space is insufficient, the migration will fail.
Failure Cause and Handling Suggestion	Failure cause: This item cannot be checked because the source database fails to be connected. Handling suggestion: Check whether the source database is connected.
	Failure cause: The destination database does not have sufficient storage space (at least 1.5 times the size of the source database). Handling suggestion: Scale up or clean up the destination database storage space. If you clean up the storage space, you will obtain more space within 2 to 3 minutes. NOTE: It is recommended that the size of the destination database disk be set to the smaller value of the following two values: 1.5 times the size of the data to be migrated in the source database. The size of the data to be migrated in the source database plus 200 GB.
	Failure cause: An internal error occurs. Handling suggestion: Contact technical support.

Parent topic: Disk Space