Data Warehouse Types
Product Type Overview
- Computing In-Memory(CIM): The storage-compute coupled data warehouse provides enterprise-level data warehouse services with high performance, high scalability, high reliability, high security, low latency, and easy O&M. It is capable of data analysis at a scale of 2,048 nodes and 20 petabytes of data and is suitable for converged analysis services that integrate databases, warehouses, marts, and lakes.
- Decoupled Storage and Compute: The storage-compute decoupled data warehouse is designed with a cloud native architecture that separates storage and compute. It also features hierarchical auto scaling for computing and storage, as well as multi-logical cluster shared storage technology (Virtual Warehouse or VW). These capabilities allow for computing isolation and concurrent expansion to handle varying loads, making it an ideal choice for OLAP analysis scenarios.
- GaussDB(DWS) data warehouses cannot access each other. You can create an OBS foreign table to associate two databases in the same data directory for data query.
Features
|
Module |
Function |
Storage-Compute Coupling |
Storage-Compute Decoupling |
|---|---|---|---|
|
Dashboard |
Resources |
Yes |
Yes |
|
Alarms |
Yes |
Yes |
|
|
Recent events |
Yes |
Yes |
|
|
Cluster monitoring metrics (DMS) |
Supported (excluding standalone systems) |
Yes |
|
|
Data |
- |
Yes |
Yes |
|
Cluster management |
SQL editor |
Yes |
Yes |
|
Monitoring panel (DMS) |
Supported (excluding standalone systems) |
Yes |
|
|
Monitoring metrics (Cloud Eye) |
Supported (excluding standalone systems) |
Yes |
|
|
Restart |
Yes |
Yes |
|
|
Start |
Yes |
Yes |
|
|
Stop |
Yes |
Yes |
|
|
Scaling |
Supported (excluding standalone systems) |
Yes |
|
|
Scale-in |
Supported (excluding standalone systems) |
Yes |
|
|
Redistributing data |
Supported (excluding standalone systems) |
Yes (Note 1) |
|
|
Viewing redistribution details |
Supported (excluding standalone systems) |
Yes |
|
|
Changing the node flavor |
Yes |
Yes |
|
|
Changing all specifications |
Supported (excluding standalone systems) |
No |
|
|
Resetting passwords |
Yes |
Yes |
|
|
Creating snapshots |
Supported (excluding standalone systems) |
Yes |
|
|
Canceling read-only status |
Yes |
Yes |
|
|
Deletion |
Yes |
Yes |
|
|
Managing CNs |
Supported (excluding standalone systems) |
Yes |
|
|
Storage space scaling |
Yes |
Yes |
|
|
Basic Information |
Basic information |
Yes |
Yes |
|
ELB |
Supported (excluding standalone systems) |
Yes |
|
|
Resource Management |
Supported (excluding standalone systems) |
Yes |
|
|
Intelligent O&M |
Supported (excluding standalone systems) |
Yes |
|
|
Logical cluster |
Supported (excluding standalone systems) |
Yes |
|
|
Snapshot |
Supported (excluding standalone systems) |
Yes |
|
|
Parameter modifications |
Yes |
Yes |
|
|
Security settings |
Yes |
Yes |
|
|
MRS data sources |
Supported (excluding standalone systems) |
Yes |
|
|
Tags |
Yes |
Yes |
|
|
Node management |
Supported (excluding standalone systems) |
Yes |
|
|
Upgrade management |
Supported (excluding standalone systems) |
Yes |
|
|
Logging |
Supported (excluding standalone systems) |
Yes |
|
|
User management |
Supported (excluding standalone systems) |
Yes |
|
|
Integration |
Data migration |
Supported (excluding standalone systems) |
Yes |
|
DR management |
DR management |
Supported (excluding standalone systems) |
No |
|
Snapshot management |
Restoration |
Supported (excluding standalone systems) |
Yes |
|
Deletion |
Supported (excluding standalone systems) |
Yes |
|
|
Copy |
Supported (excluding standalone systems) |
Yes |
|
|
Incident management |
Event management (general) |
Yes |
Yes |
|
Alarm management |
Alarm management |
Yes |
Yes |
|
Client connections |
Client connections |
Yes |
Yes |
|
Others |
Inspection |
Supported (excluding standalone systems) |
Yes |
|
Intelligent O&M |
Supported (excluding standalone systems) |
Yes |
|
|
Node restoration |
Supported (excluding standalone systems) |
Yes |
|
|
Warm backup on the tenant side |
Supported (excluding standalone systems) |
Yes |
- Note 1: The storage-compute separated table stores data on OBS, eliminating the need for redistribution. However, metadata and indexes are stored locally and must still be redistributed. Redistributing a table with separated storage and compute nodes only allows for read operations, and metadata redistribution is fast. However, creating an index on the table can affect redistribution performance, with completion time increasing with index data volume. During this period, the table is read-only and cannot be modified.
- A storage-compute coupled data warehouse deployed in standalone mode cannot be changed to the distributed mode. Scaling, logical cluster operations, and resource management are not supported.
- A storage-compute coupled data warehouse deployed in standalone mode does not support functions such as snapshots, monitoring panels, and MRS data sources.
- In storage-compute coupled data warehouse (standalone), the original syntax for specifying distribution columns will be ignored. Scheduled jobs, the sequence type, HDFS/OBS foreign table import and export, multi-temperature storage, and auto-increment partitioned tables are not supported. OBS foreign table import and export are supported in 8.2.0 and later versions.
- Only storage-compute decoupled clusters of 9.0.2 and later versions support the snapshot function.
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