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| <article class="doc"> |
| <h1 class="page">Apache Cassandra Quickstart</h1> |
| <div class="paragraph"> |
| <p><em>Interested in getting started with Cassandra? Follow these instructions.</em></p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 1: GET CASSANDRA USING DOCKER</strong></p> |
| </div> |
| <div class="paragraph"> |
| <p>You’ll need to have Docker Desktop for Mac, Docker Desktop for Windows, or |
| similar software installed on your computer.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">docker pull cassandra:latest</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Apache Cassandra is also available as a <a href="/download/">tarball or package download</a>.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 2: START CASSANDRA</strong></p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">docker run --name cass_cluster cassandra:latest</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 3: CREATE FILES</strong></p> |
| </div> |
| <div class="paragraph"> |
| <p>In the directory where you plan to run the next step, create these two files |
| so that some data can be automatically inserted in the next step.</p> |
| </div> |
| <div class="paragraph"> |
| <p>A <em>cqlshrc</em> file will log into the Cassandra database with the default superuser:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-plaintext hljs" data-lang="plaintext">[authentication] |
| username = cassandra |
| password = cassandra</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Create a <em>scripts</em> directory and change to that directory. |
| The following <em>data.cql</em> file will create a keyspace, the layer at which Cassandra |
| replicates its data, a table to hold the data, and insert some data:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell"># Create a keyspace |
| CREATE KEYSPACE IF NOT EXISTS store WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : '1' }; |
| # Create a table |
| CREATE TABLE IF NOT EXISTS store.shopping_cart ( |
| userid text PRIMARY KEY, |
| item_count int, |
| last_update_timestamp timestamp |
| ); |
| # Insert some data |
| INSERT INTO store.shopping_cart |
| (userid, item_count, last_update_timestamp) |
| VALUES ('9876', 2, toTimeStamp(toDate(now)))); |
| INSERT INTO store.shopping_cart |
| (userid, item_count, last_update_timestamp) |
| VALUES (1234, 5, toTimeStamp(toDate(now))));</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>You should now have a <em>cqlshrc</em> file and <em><currentdir>/scripts/data.cql</em> file.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 4: RUN CQLSH TO INTERACT</strong></p> |
| </div> |
| <div class="paragraph"> |
| <p>Cassandra is a distributed database that can read and write data across multiple |
| nodes with peer-to-peer replication. The Cassandra Query Language (CQL) is |
| similar to SQL but suited for the JOINless structure of Cassandra. The CQL |
| shell, or <code>cqlsh</code>, is one tool to use in interacting with the database.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">docker run --rm -it -v /<currentdir>/scripts:/scripts \ |
| -v /<currentdir/cqlshrc:/.cassandra/cqlshrc \ |
| --env CQLSH_HOST=host.docker.internal --env CQLSH_PORT=9042 nuvo/docker-cqlsh</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>For this quickstart, this cqlsh docker image also loads some data automatically, |
| so you can start running queries.</p> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 5: READ SOME DATA</strong></p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">SELECT * FROM store.shopping_cart;</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 6: WRITE SOME MORE DATA</strong></p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">INSERT (userid, item_count) VALUES (4567, 20) INTO store.shopping_cart;</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><strong>STEP 7: TERMINATE CASSANDRA</strong></p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-shell hljs" data-lang="shell">docker rm cassandra</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><strong>CONGRATULATIONS!</strong></p> |
| </div> |
| <div class="paragraph"> |
| <p>Hey, that wasn’t so hard, was it?</p> |
| </div> |
| <div class="paragraph"> |
| <p>To learn more, we suggest the following next steps:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Read through the <strong>need link</strong>[Overview] to learn main concepts and how Cassandra works at a |
| high level.</p> |
| </li> |
| <li> |
| <p>To understand Cassandra in more detail, head over to the |
| <a href="/doc/latest/">Docs</a>.</p> |
| </li> |
| <li> |
| <p>Browse through the <a href="/case-studies/">Case Studies</a> to |
| learn how other users in our worldwide community are getting value out of |
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