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ClickHouse® is a real-time analytics DBMS
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We build clickhouse cluster in k8s by clickhouse-operator. clickhouse-server.log is mounted by emptydir on the path `/var/log/clickhouse-server`. It causes the file system error called `Necessary directory '/var/log/clickhouse-server' isn't owned by user with id '101' ` when CLICKHOUSE_DO_NOT_CHOWN is set to true(1). Because emptydir file and dir is owned by root when it started, it has to do the chown cmd. But it will take a long time to run chown cmd when the cluster has much data (in table data dir), the cluster cannot even restart because of `initialDelaySeconds` So chown operation is necessary to check if the file owner and group is owned by user 101. |
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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 quick high-level overview of ClickHouse on main page.
- Tutorial shows how to set up and query 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 to chat with ClickHouse users in real-time.
- Blog contains various ClickHouse-related articles, as well as announcements and reports about events.
- Code Browser with syntax highlight and navigation.
- Contacts can help to get your questions answered if there are any.
- You can also fill this form to meet Yandex ClickHouse team in person.