PolarDB for PostgreSQL (hereafter simplified as PolarDB) is a cloud native database service independently developed by Alibaba Cloud. This service is 100% compatible with PostgreSQL and uses a shared-storage-based architecture in which computing is decoupled from storage. This service features flexible scalability, millisecond-level latency and hybrid transactional/analytical processing (HTAP) capabilities.
Flexible scalability: You can use the service to scale out a compute cluster or a storage cluster based on your business requirements.
If the computing power is insufficient, you can scale out only the compute cluster.
If the storage capacity or the storage I/O is insufficient, you can scale out a storage cluster without interrupting your service.
Millisecond-level latency:
Write-ahead logging (WAL) logs are stored in the shared storage. Only the metadata of WAL records is replicated from the read-write node to read-only nodes.
The LogIndex technology provided by PolarDB features two record replay modes: lazy replay and parallel replay. The technology can be used to minimize the record replication latency from the read-write node to read-only nodes.
HTAP: HTAP is implemented by using a shared-storage-based massively parallel processing (MPP) architecture. The architecture is used to accelerate online analytical processing (OLAP) queries in online transaction processing (OLTP) scenarios. PolarDB supports a complete suite of data types that are used in OLTP scenarios. PolarDB supports two computing engines that can process these types of data:
Standalone execution: processes OLTP queries that feature high concurrency.
Distributed execution: processes large OLAP queries.
PolarDB provides a wide range of innovative multi-model database capabilities to help you process, analyze, and search for different types of data, such as spatio-temporal, geographic information system (GIS), image, vector, and graph data.
polardbpg
PolarDB for PostgreSQL (hereafter simplified as PolarDB) is a cloud native database service independently developed by Alibaba Cloud. This service is 100% compatible with PostgreSQL and uses a shared-storage-based architecture in which computing is decoupled from storage. This service features flexible scalability, millisecond-level latency and hybrid transactional/analytical processing (HTAP) capabilities.
Flexible scalability: You can use the service to scale out a compute cluster or a storage cluster based on your business requirements. If the computing power is insufficient, you can scale out only the compute cluster. If the storage capacity or the storage I/O is insufficient, you can scale out a storage cluster without interrupting your service. Millisecond-level latency: Write-ahead logging (WAL) logs are stored in the shared storage. Only the metadata of WAL records is replicated from the read-write node to read-only nodes. The LogIndex technology provided by PolarDB features two record replay modes: lazy replay and parallel replay. The technology can be used to minimize the record replication latency from the read-write node to read-only nodes. HTAP: HTAP is implemented by using a shared-storage-based massively parallel processing (MPP) architecture. The architecture is used to accelerate online analytical processing (OLAP) queries in online transaction processing (OLTP) scenarios. PolarDB supports a complete suite of data types that are used in OLTP scenarios. PolarDB supports two computing engines that can process these types of data: Standalone execution: processes OLTP queries that feature high concurrency. Distributed execution: processes large OLAP queries. PolarDB provides a wide range of innovative multi-model database capabilities to help you process, analyze, and search for different types of data, such as spatio-temporal, geographic information system (GIS), image, vector, and graph data.