This is repository contains a fork of Apache Cassandra ready to embed Elasticsearch indices, see Elassandra project. For build and install instructions, see the official Apache Cassandra README
You can build Elassandra with any Cassandra version 3.x including the following modifications (at least mandatory modifications, optional modifications just provides new features or improvements). See How to contribute in the Elassandra project.
This software is licensed under the Apache License, version 2 ("ALv2"), quoted below.
Copyright 2015-2019, Strapdata ([email protected]).
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License.-
Elasticsearch and Kibana are trademarks of Elasticsearch BV, registered in the U.S. and in other countries.
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Apache Cassandra, Apache, and Cassandra are trademarks of the Apache Software Foundation.
Note for Windows users: to install Cassandra as a service, download 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 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?
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Join us in #cassandra on irc.freenode.net and ask questions
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Subscribe to the Users mailing list by sending a mail to [email protected]
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Visit the community section of the Cassandra website for more information on getting involved.