pgcat
mssql-changefeed | pgcat | |
---|---|---|
4 | 3 | |
14 | 2,539 | |
- | 2.2% | |
6.6 | 8.0 | |
5 months ago | 6 days ago | |
Go | Rust | |
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
mssql-changefeed
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How to Listen to Database Changes Using Postgres Triggers in Elixir
We made mssql-changefeed for this purpose:
https://github.com/vippsas/mssql-changefeed
V1 requires to run a sweeper procedure in the background, but an upcoming v2 version does without the sweep loop. Unfortunately too fresh for readme to be updated, but relevant lines in tests to show it off:
https://github.com/vippsas/mssql-changefeed/blob/v1-lazy/go/...
https://github.com/vippsas/mssql-changefeed/blob/v1-lazy/go/...
https://github.com/vippsas/mssql-changefeed/blob/v1-lazy/go/...
Library itself:
https://github.com/vippsas/mssql-changefeed/blob/v1-lazy/mig...
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Push-Based Outbox Pattern with Postgres Logical Replication
Not OP, but there is an approach here of using a dedicated loop worker to assign post-commit ID sequence. I.e. using the outbox pattern once, simply to assign a post-commit ID.
https://github.com/vippsas/mssql-changefeed/blob/main/MOTIVA...
I wish DBs had this more built in, it seems a critical feature of a DB these days and the commit log already have very similar sequence numbers internally...
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The Next Generation of Materialize
We do something similar, but in 2), instead of using the outbox pattern, we make use (in several different settings) of integers that are guaranteed to increment in commit order, then each consumer can track where their cursor is on the feed of changes. This requires some more coordination but it means that publishers of changes don't need one outbox per consumer or similar.
Then you can have "processes" that query for new data in an input table, and update aggregates/derived tables from that simply by "select * ... where ChangeSequenceNumber > @MaxSequenceNumberFromPreviousExecution"...
The idea here implemented for Microsoft SQL for the OLTP case:
https://github.com/vippsas/mssql-changefeed
pgcat
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MySQL 8.2 Introduces Transparent Read/Write Splitting
Not natively, no. You’d need to front it with something like PgCat [0].
[0]: https://github.com/postgresml/pgcat
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How to Listen to Database Changes Using Postgres Triggers in Elixir
For #1 I've been keeping a keen eye on pgcat [1], in particular the https://github.com/postgresml/pgcat/issues/303 which
- Can someone share experience configuring Highly Available PgSQL?
What are some alternatives?
marmot - A distributed SQLite replicator built on top of NATS
pgbouncer - lightweight connection pooler for PostgreSQL
supavisor - A cloud-native, multi-tenant Postgres connection pooler.
odyssey - Scalable PostgreSQL connection pooler
zeroeventhub
postgresql_cluster - PostgreSQL High-Availability Cluster (based on "Patroni" and DCS "etcd" or "consul"). Automating with Ansible.
rust-postgres - Native PostgreSQL driver for the Rust programming language
postgrex_pubsub - A helper to turn postgres mutations into a pubsub channel
cloudpilot-emu - A PalmOS emulator for the web
risingwave - SQL stream processing, analytics, and management. PostgreSQL simplicity, unrivaled performance, and seamless elasticity. 🚀 10x more productive. 🚀 10x more cost-efficient.
citus - Distributed PostgreSQL as an extension