Cross-Cluster Asynchronous Replication
Cross-cluster asynchronous replication allows data to be replicated automatically from a DolphinDB server (the master cluster) to one or more servers (slave clusters) for data consistency and offsite disaster recovery. DolphinDB’s cluster replication provides enhanced fault tolerance with convenient maintenance.
Compatibility
Currently, cluster replication is only supported on DFS databases. Operations regarding access control management, tiered storage and configuration for storage engines cannot be replicated.
The following table displays functions and DDL/DML operations supported in cluster replication:
Function |
Operation Type |
|---|---|
append / tableInsert |
APPEND, APPEND_CHUNK_GRANULARITY |
delete |
SQL_DELETE |
update |
SQL_UPDATE |
upsert! |
UPSERT |
dropTable |
DROP_TABLE |
dropPartition |
DROP_PARTITION |
dropDatabase |
DROP_DB |
addRangePartitions |
ADD_RANGE_PARTITION |
addValuePartitions |
ADD_VALUE_PARTITION |
database |
CREATE_DOMAIN |
create |
CREATE_TABLE |
addColumn |
ADD_COLUMN |
dropColumns |
DROP_COLUMN |
renameTable |
RENAME_TABLE |
truncate |
TRUNCATE_TABLE |
replaceColumn |
REPLACE_COLUMN |
setColumnComment |
SET_COLUMN_COMMENT |
rename! |
RENAME_COLUMN |