RisingWave

Postgres-compatible streaming database maintaining materialized views over streams.

Provider: default
Kind: Stream processor
Category: Messaging
Official docs: https://docs.risingwave.com/reference/data-persistence

Properties · 4 set by this component

property	type	values	required	kind default	this component
checkpointIntervalSeconds	integer	—	no	—	▸ 1
exactlyOnce	boolean	—	no	false	inherited
instances	integer	—	no	—	inherited
lateDataPolicy	enum	drop \| shift \| sideline	no	—	inherited
managed	boolean	—	no	false	▸ false
objectStore · component property	enum	s3 \| gcs \| azblob \| hdfs \| minio	no	s3	inherited
stateBackend	enum	memory \| rocksdb \| external	no	memory	▸ external
streamingParallelism · component property	integer	—	no	64	inherited
watermarkSeconds	integer	—	no	—	inherited
windowing	enum	none \| event-time \| processing-time	no	none	▸ event-time

Rules that apply · 1

Every rule whose selector covers this component's kind or its category. Whether a rule fires depends on the design: its properties, its edges and its groups.

Event-time windows without watermarkwarning

windowed-aggregation-without-watermark

Event-time windows need a watermark to know when a window is complete. Without one the processor either waits forever or closes windows early and silently drops late events.

— all of these hold:
— the node's `windowing` is "event-time"
— the node's `watermarkSeconds` has no value

Use it in a design

nodes:
  - { id: "risingwave", component: "risingwave" }

Other Stream processor products · 33

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Source

1# yaml-language-server: $schema=../../schema/component.schema.json
2# RisingWave: streaming database. A barrier is injected every second (barrier_interval_ms = 1000) and
3# every barrier produces a checkpoint, a Chandy-Lamport global snapshot of the whole system; internal
4# state, tables and materialized views are persisted by the Hummock engine on object storage
5# ("RisingWave, Data persistence" and "Key concepts"). streaming_parallelism resolves to bounded(64).
6schemaVersion: "1"
7type: "component"
8id: "risingwave"
9kind: "stream-processor"
10provider: "default"
11docs: "https://docs.risingwave.com/reference/data-persistence"
12defaults:
13  managed: false
14  windowing: "event-time"
15  checkpointIntervalSeconds: 1
16  stateBackend: "external"
17properties:
18  objectStore:
19    type: "enum"
20    values: ["s3", "gcs", "azblob", "hdfs", "minio"]
21    default: "s3"
22  streamingParallelism:
23    type: "integer"
24    default: 64

The same page as markdown, for an agent: /catalogue/components/risingwave.md