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ClickHouse® is a real-time analytics DBMS
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DNS_ERROR would cause the replica to not be marked as unusable, resulting in the replica being repeatedly reattempted on subsequent queries and for connection failover to break. (This is common in Kubernetes setups where a replica has failed and it's DNS record is returning NXDOMAIN) On SELECT, would additionally result in an intermittent query error if the failed replica is chosen: "Code: 198. DB::Exception: Received from localhost:9000. DB::Exception: Not found address of host: chi-clickhouse-main-2-0: While executing Remote. (DNS_ERROR)" |
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ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.
Useful Links
- Official website has a quick high-level overview of ClickHouse on the main page.
- Tutorial shows how to set up and query a small ClickHouse cluster.
- Documentation provides more in-depth information.
- YouTube channel has a lot of content about ClickHouse in video format.
- Slack and Telegram allow chatting with ClickHouse users in real-time.
- Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
- Code Browser (Woboq) with syntax highlight and navigation.
- Code Browser (github.dev) with syntax highlight, powered by github.dev.
- Contacts can help to get your questions answered if there are any.
Upcoming events
- v22.8 Release Webinar Original creator, co-founder, and CTO of ClickHouse Alexey Milovidov will walk us through the highlights of the release, provide live demos, and share vision into what is coming in the roadmap.