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* CLICKHOUSE-4063: less manual html @ index.md * CLICKHOUSE-4063: recommend markdown="1" in README.md * CLICKHOUSE-4003: manually purge custom.css for now * CLICKHOUSE-4064: expand <details> before any print (including to pdf) * CLICKHOUSE-3927: rearrange interfaces/formats.md a bit * CLICKHOUSE-3306: add few http headers * Remove copy-paste introduced in #3392 * Hopefully better chinese fonts #3392 * get rid of tabs @ custom.css * Apply comments and patch from #3384 * Add jdbc.md to ToC and some translation, though it still looks badly incomplete * minor punctuation * Add some backlinks to official website from mirrors that just blindly take markdown sources * Do not make fonts extra light * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's//g' {} * find . -name '*.md' -type f | xargs -I{} perl -pi -e 's/ sql/g' {} * Remove outdated stuff from roadmap.md * Not so light font on front page too * Refactor Chinese formats.md to match recent changes in other languages
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Getting Started
System Requirements
Installation from the official repository requires Linux with x86_64 architecture and support for the SSE 4.2 instruction set.
To check for SSE 4.2:
grep -q sse4_2 /proc/cpuinfo && echo "SSE 4.2 supported" || echo "SSE 4.2 not supported"
We recommend using Ubuntu or Debian. The terminal must use UTF-8 encoding.
For rpm-based systems, you can use 3rd-party packages: https://packagecloud.io/altinity/clickhouse or install debian packages.
ClickHouse also works on FreeBSD and Mac OS X. It can be compiled for x86_64 processors without SSE 4.2 support, and for AArch64 CPUs.
Installation
For testing and development, the system can be installed on a single server or on a desktop computer.
Installing from Packages for Debian/Ubuntu
In /etc/apt/sources.list (or in a separate /etc/apt/sources.list.d/clickhouse.list file), add the repository:
deb http://repo.yandex.ru/clickhouse/deb/stable/ main/
If you want to use the most recent test version, replace 'stable' with 'testing'.
Then run:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4 # optional
sudo apt-get update
sudo apt-get install clickhouse-client clickhouse-server
You can also download and install packages manually from here: https://repo.yandex.ru/clickhouse/deb/stable/main/.
ClickHouse contains access restriction settings. They are located in the 'users.xml' file (next to 'config.xml'). By default, access is allowed from anywhere for the 'default' user, without a password. See 'user/default/networks'. For more information, see the section "Configuration files".
Installing from Sources
To compile, follow the instructions: build.md
You can compile packages and install them. You can also use programs without installing packages.
Client: dbms/programs/clickhouse-client
Server: dbms/programs/clickhouse-server
For the server, create a catalog with data, such as:
/opt/clickhouse/data/default/
/opt/clickhouse/metadata/default/
(Configurable in the server config.) Run 'chown' for the desired user.
Note the path to logs in the server config (src/dbms/programs/server/config.xml).
Other Installation Methods
Docker image: https://hub.docker.com/r/yandex/clickhouse-server/
RPM packages for CentOS or RHEL: https://github.com/Altinity/clickhouse-rpm-install
Gentoo: emerge clickhouse
Launch
To start the server (as a daemon), run:
sudo service clickhouse-server start
See the logs in the /var/log/clickhouse-server/ directory.
If the server doesn't start, check the configurations in the file /etc/clickhouse-server/config.xml.
You can also launch the server from the console:
clickhouse-server --config-file=/etc/clickhouse-server/config.xml
In this case, the log will be printed to the console, which is convenient during development. If the configuration file is in the current directory, you don't need to specify the '--config-file' parameter. By default, it uses './config.xml'.
You can use the command-line client to connect to the server:
clickhouse-client
The default parameters indicate connecting with localhost:9000 on behalf of the user 'default' without a password. The client can be used for connecting to a remote server. Example:
clickhouse-client --host=example.com
For more information, see the section "Command-line client".
Checking the system:
milovidov@hostname:~/work/metrica/src/dbms/src/Client$ ./clickhouse-client
ClickHouse client version 0.0.18749.
Connecting to localhost:9000.
Connected to ClickHouse server version 0.0.18749.
:) SELECT 1
SELECT 1
┌─1─┐
│ 1 │
└───┘
1 rows in set. Elapsed: 0.003 sec.
:)
Congratulations, the system works!
To continue experimenting, you can try to download from the test data sets.