patroni
citus
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patroni | citus | |
---|---|---|
19 | 61 | |
6,212 | 9,801 | |
2.1% | 3.3% | |
9.2 | 9.5 | |
17 days ago | 7 days ago | |
Python | C | |
MIT License | GNU Affero General Public License v3.0 |
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.
patroni
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Citus is not ACID but Eventually Consistent
Citus doesn't provide fault tolerance. Each shard is a monolithic PostgreSQL. To reduce downtime on failures, you can protect each shard with a standby database. As this is a complex configuration, Patroni can help. For this lab I'll use the Citus+Patroni docker-compose-citus.yml from https://github.com/zalando/patroni.git:
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How to create postgres cluster in docker swarm?
We have been using stolon + consul for years without issue in our swarm environments. It may also be possible with patroni.
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Why PostgreSQL High Availability Matters and How to Achieve It
one of the solutions which made it pretty simple for us to run postgresql in a ha environment (mostly in k8s, but works standalone as well) is zalandos patroni: https://github.com/zalando/patroni it's really solid and worked for us for a few years already.
or for k8s their operator: https://github.com/zalando/postgres-operator (docker image: https://github.com/zalando/spilo) we've also tried other operators which were easier to get started, but they failed miserably (crunchyrolls operator is basically based on the zalando one)
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Docker: Patroni + HAProxy + Etcd + PgBouncer
Hello. I am currently using this docker-compose model from Zalando repository. It does not include PgBouncer in its architecture by default. I've been trying to find a containerized implementation involving Patroni, HAProxy, Etcd and PgBouncer. I didn't find anything solid so far.
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Can someone share experience configuring Highly Available PgSQL?
General purpose: Patroni - Set up your own etcd + HAProxy + Patroni + Postgres components and it'll generally manage itself after that.
- Patroni Version 3.0.0 Released
- Any self hostable postgres clustering, replication and fail over system?
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Postgresql HA using repmgr and Keepalived
I don't have a great answer for you except that it sounds like you are trying to create your own version of patroni. Is there a good reason to not just use patroni?
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Testing Patroni strict synchronous mode 👉🏻 you must handle invisible commit and read split brain
git clone https://github.com/zalando/patroni.git cd patroni docker build -t patroni . docker-compose up -d
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Any recommandation Postgres Operator ?
I actually used Patroni on Openshift in my company. To be update with the latest version we created our helm chart.
citus
- SPQR 1.3.0: a production-ready system for horizontal scaling of PostgreSQL
- Citus: PostgreSQL extension that transforms Postgres into a distributed database
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Figma's Databases team lived to tell the scale
I see they don't mention Citus (https://github.com/citusdata/citus), which is already a fairly mature native Postgres extension. From the details given in the article, in sounds like they just reimplemented it.
I wonder if they were unaware of it or disregarded it for a reason —I currently am in a similar situation as the one described in the blog, trying to shard a massive Postgres DB.
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PostgreSQL Is Enough
It is possible, if you pay for it. You can do Multi-AZ Clustered Instances in RDS, where you get the benefits of Multi-AZ failover with traffic sharing.
If you can run your own infra – at least on an EC2 level – you can do things like Citus [0] for Postgres, which is about as close to "just add database nodes" as you'll get.
[0]: https://www.citusdata.com/
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Vitess 18
So while searching for something like this for postgres I came across citus. Any one know how that stacks up?
https://github.com/citusdata/citus
- In-Depth Guide: Citus Technical Readme
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Revolutionizing Database Scaling with CitusDB
References: CitusDB
- Squeeze the hell out of the system you have
- Show HN: Hydra 1.0 – open-source column-oriented Postgres
- Schema-based sharding comes to PostgreSQL with Citus
What are some alternatives?
pg_auto_failover - Postgres extension and service for automated failover and high-availability
Greenplum - Greenplum Database - Massively Parallel PostgreSQL for Analytics. An open-source massively parallel data platform for analytics, machine learning and AI.
stolon - PostgreSQL cloud native High Availability and more.
yugabyte-db - YugabyteDB - the cloud native distributed SQL database for mission-critical applications.
Grafana - The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.
vitess - Vitess is a database clustering system for horizontal scaling of MySQL.
postgresql_cluster - PostgreSQL High-Availability Cluster (based on "Patroni" and DCS "etcd" or "consul"). Automating with Ansible.
TimescaleDB - An open-source time-series SQL database optimized for fast ingest and complex queries. Packaged as a PostgreSQL extension.
stolon-chart - Kubernetes Helm chart to deploy HA Postgresql cluster based on Stolon
dbt-core - dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
crunchy-proxy - PostgreSQL Connection Proxy by Crunchy Data (beta)