Constraints

FDI

**Table 1** Constraints
Function	Constraint
Data synchronization (covering all data source types)	A single data record cannot exceed 10 MB. The fields in time format support down-to-second precision.
FTP data source	When the parsing mode is enabled, each file cannot exceed 200 MB and can contain a maximum of 1,500,000 records. When the parsing mode is disabled, a maximum of 20,000 files are supported, with each file equal to or less than 6 MB.
OBS data source	If the parsing mode is enabled, the file cannot exceed 200 MB. Otherwise, the file cannot exceed 10 MB.
MRS data source	Only MRS clusters authenticated by Kerberos can be connected.
MRS Hive data source	Hive supports only RCFile and TEXTFILE read and write. When MRS Hive serves as the source, only tables of up to 1 million records can be synchronized.
API data source	If the server does not respond in 60 seconds, an error is reported during task execution. When the API serves as the source, every request can read up to 20 MB data. Otherwise, paging must be enabled. When the API serves as the source, only constant parameters are supported. Dynamic parameter transfer is not supported. When the API serves as the destination, the source data cannot be mapped to the destination headers.
Kafka data source	SASL can be used only to connect ROMA Connect MQS. The Kafka service developed by users themselves supports only plaintext connection.
Oracle database	Only the following field types are supported: CHAR, VARCHAR, DATE, NUMBER, FLOAT, LONG, NCHAR, NVARCHAR2, RAW, TIMESTAMP
SQL Server database	Only the following field types are supported: BIT, CHAR, DATE, DATETIME, DECIMAL, FLOAT, IMAGE, INT, MONEY, NUMERIC
MySQL database	Only the following field types are supported: INT, BIGINT, TINYINT, MEDIUMINT, FLOAT, DOUBLE, DECIMAL, CHAR, VARCHAR, TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT, DATETIME, TIMESTAMP, SMALLINT, YEAR, BINARY, BITDECIMAL, JSON, DOUBLE
PostgreSQL/DWS database	Only the following field types are supported: BOOL, CIDR, CIRCLE, DATE, NUMERIC, FLOAT4, FLOAT8, MONEY, PATH, POINT, INT, TIMESTAMP, TIMETZ, UUID, VARBIT, VARCHAR
Relational database	A maximum of 10 million data records can be synchronized.
Composite task (CDC)	The source supports only MySQL, SQL Server, Oracle, and GaussDB(for MySQL). The destination supports only MySQL, SQL Server, Oracle, PostgreSQL, Kafka, and GaussDB(for MySQL). The destination table must have a primary key. Otherwise, data synchronization will be affected.