https://github.com/palantir/cassandra
Palantir's fork of Apache Cassandra
https://github.com/palantir/cassandra
octo-correct-managed
Last synced: 2 months ago
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Palantir's fork of Apache Cassandra
- Host: GitHub
- URL: https://github.com/palantir/cassandra
- Owner: palantir
- License: apache-2.0
- Created: 2018-11-07T00:17:42.000Z (over 6 years ago)
- Default Branch: palantir-cassandra-2.2.18
- Last Pushed: 2024-10-29T08:07:45.000Z (8 months ago)
- Last Synced: 2024-10-29T09:25:13.487Z (8 months ago)
- Topics: octo-correct-managed
- Language: Java
- Homepage:
- Size: 333 MB
- Stars: 10
- Watchers: 238
- Forks: 7
- Open Issues: 80
-
Metadata Files:
- Readme: README.asc
- Changelog: CHANGES.txt
- Contributing: CONTRIBUTING.md
- License: LICENSE.txt
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README
Executive summary
-----------------
Cassandra is a partitioned row store. Rows are organized into tables with a required primary key.
http://wiki.apache.org/cassandra/Partitioners[Partitioning] means that Cassandra can distribute your data across multiple machines in an application-transparent matter. Cassandra will automatically repartition as machines are added and removed from the cluster.
http://wiki.apache.org/cassandra/DataModel[Row store] means that like relational databases, Cassandra organizes data by rows and columns. The Cassandra Query Language (CQL) is a close relative of SQL.
For more information, see http://cassandra.apache.org/[the Apache Cassandra web site].
Requirements
------------
. Java >= 1.7 (OpenJDK and Oracle JVMS have been tested)
. Python 2.7 (for cqlsh)
Getting started
---------------
This short guide will walk you through getting a basic one node cluster up
and running, and demonstrate some simple reads and writes.
First, we'll unpack our archive:
$ tar -zxvf apache-cassandra-$VERSION.tar.gz
$ cd apache-cassandra-$VERSION
After that we start the server. Running the startup script with the -f argument will cause
Cassandra to remain in the foreground and log to standard out; it can be stopped with ctrl-C.
$ bin/cassandra -f
****
Note for Windows users: to install Cassandra as a service, download
http://commons.apache.org/daemon/procrun.html[Procrun], set the
PRUNSRV environment variable to the full path of prunsrv (e.g.,
C:\procrun\prunsrv.exe), and run "bin\cassandra.bat install".
Similarly, "uninstall" will remove the service.
****
Now let's try to read and write some data using the Cassandra Query Language:
$ bin/cqlsh
The command line client is interactive so if everything worked you should
be sitting in front of a prompt:
----
Connected to Test Cluster at localhost:9160.
[cqlsh 2.2.0 | Cassandra 1.2.0 | CQL spec 3.0.0 | Thrift protocol 19.35.0]
Use HELP for help.
cqlsh>
----
As the banner says, you can use 'help;' or '?' to see what CQL has to
offer, and 'quit;' or 'exit;' when you've had enough fun. But lets try
something slightly more interesting:
----
cqlsh> CREATE KEYSPACE schema1
WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };
cqlsh> USE schema1;
cqlsh:Schema1> CREATE TABLE users (
user_id varchar PRIMARY KEY,
first varchar,
last varchar,
age int
);
cqlsh:Schema1> INSERT INTO users (user_id, first, last, age)
VALUES ('jsmith', 'John', 'Smith', 42);
cqlsh:Schema1> SELECT * FROM users;
user_id | age | first | last
---------+-----+-------+-------
jsmith | 42 | john | smith
cqlsh:Schema1>
----
If your session looks similar to what's above, congrats, your single node
cluster is operational!
For more on what commands are supported by CQL, see
https://github.com/apache/cassandra/blob/trunk/doc/cql3/CQL.textile[the CQL reference]. A
reasonable way to think of it is as, "SQL minus joins and subqueries, plus collections."
Wondering where to go from here?
* Getting started: http://wiki.apache.org/cassandra/GettingStarted
* Join us in #cassandra on irc.freenode.net and ask questions
* Subscribe to the Users mailing list by sending a mail to
[email protected]
* Planet Cassandra aggregates Cassandra articles and news:
http://planetcassandra.org/