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<h1>Apache Cassandra Usage Report 2020</h1>
<h3>September 17, 2020 | The Apache Cassandra Community</h3>
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<p>Apache Cassandra is the open source NoSQL database for mission critical data. Today the community announced findings from a comprehensive global survey of 901 practitioners on Cassandra usage. It’s the first of what will become an annual survey that provides a baseline understanding of who, how, and why organizations use Cassandra.</p>
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<p>“I saw zero downtime at global scale with Apache Cassandra. That’s a powerful statement to make. For our business that’s quite crucial.” - Practitioner, London</p>
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</blockquote>
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<div class="sect2">
<h3 id="key-themes"><a class="anchor" href="#key-themes"></a>Key Themes</h3>
<div class="paragraph">
<p><strong>Cassandra adoption is correlated with organizations in a more advanced stage of digital transformation.</strong></p>
</div>
<div class="paragraph">
<p>People from organizations that self-identified as being in a “highly advanced” stage of digital transformation were more likely to be using Cassandra (26%) compared with those in an “advanced” stage (10%) or “in process” (5%).</p>
</div>
<div class="paragraph">
<p><strong>Optionality, security, and scalability are among the key reasons Cassandra is selected by practitioners.</strong></p>
</div>
<div class="paragraph">
<p>The top reasons practitioners use Cassandra for mission critical apps are “good hybrid solutions” (62%), “very secure” (60%), “highly scalable” (57%), “fast” (57%), and “easy to build apps with” (55%).</p>
</div>
<div class="paragraph">
<p><strong>A lack of skilled staff and the challenge of migration deters adoption of Cassandra.</strong></p>
</div>
<div class="paragraph">
<p>Thirty-six percent of practitioners currently using Cassandra for mission critical apps say that a lack of Cassandra-skilled team members may deter adoption. When asked what it would take for practitioners to use Cassandra for more applications and features in production, they said “easier to migrate” and “easier to integrate.”</p>
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</div>
<div class="sect2">
<h3 id="methodology"><a class="anchor" href="#methodology"></a>Methodology</h3>
<div class="paragraph">
<p><strong>Sample.</strong> The survey consisted of 1,404 interviews of IT professionals and executives, including 901 practitioners which is the focus of this usage report, from April 13-23, 2020. Respondents came from 13 geographies (China, India, Japan, South Korea, Germany, United Kingdom, France, the Netherlands, Ireland, Brazil, Mexico, Argentina, and the U.S.) and the survey was offered in seven languages corresponding to those geographies. While margin of sampling error cannot technically be calculated for online panel populations where the relationship between sample and universe is unknown, the margin of sampling error for equivalent representative samples would be +/- 2.6% for the total sample, +/- 3.3% for the practitioner sample, and +/- 4.4% for the executive sample.</p>
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<div class="paragraph">
<p>To ensure the highest quality respondents, surveys include enhanced screening beyond title and activities of company size (no companies under 100 employees), cloud IT knowledge, and years of IT experience.</p>
</div>
<div class="paragraph">
<p><strong>Rounding and multi-response.</strong> Figures may not add to 100 due to rounding or multi-response questions.</p>
</div>
</div>
<div class="sect2">
<h3 id="demographics"><a class="anchor" href="#demographics"></a>Demographics</h3>
<div class="paragraph">
<p>Practitioner respondents represent a variety of roles as follows: Dev/DevOps (52%), Ops/Architect (29%), Data Scientists and Engineers (11%), and Database Administrators (8%) in the Americas (43%), Europe (32%), and Asia Pacific (12%).</p>
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<div class="content">
<img src="../_images/blog/blog-post-usage-report-2020/image1.jpg" alt="Cassandra Roles">
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<div class="paragraph">
<p>Respondents include both enterprise (65% from companies with 1k+ employees) and SMEs (35% from companies with at least 100 employees). Industries include IT (45%), financial services (11%), manufacturing (8%), health care (4%), retail (3%), government (5%), education (4%), telco (3%), and 17% were listed as “other.”</p>
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<img src="../_images/blog/blog-post-usage-report-2020/image2.jpg" alt="Cassandra Companies">
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<div class="sect2">
<h3 id="cassandra-adoption"><a class="anchor" href="#cassandra-adoption"></a>Cassandra Adoption</h3>
<div class="paragraph">
<p>Twenty-two percent of practitioners are currently using or evaluating Cassandra with an additional 11% planning to use it in the next 12 months.</p>
</div>
<div class="paragraph">
<p>Of those currently using Cassandra, 89% are using open source Cassandra, including both self-managed (72%) and third-party managed (48%).</p>
</div>
<div class="paragraph">
<p>Practitioners using Cassandra today are more likely to use it for more projects tomorrow. Overall, 15% of practitioners say they are extremely likely (10 on a 10-pt scale) to use it for their next project. Of those, 71% are currently using or have used it before.</p>
</div>
<div class="imageblock">
<div class="content">
<img src="../_images/blog/blog-post-usage-report-2020/image3.jpg" alt="Cassandra Adoption">
</div>
</div>
</div>
<div class="sect2">
<h3 id="cassandra-usage"><a class="anchor" href="#cassandra-usage"></a>Cassandra Usage</h3>
<div class="paragraph">
<p>People from organizations that self-identified as being in a “highly advanced” stage of digital transformation were more likely to be using Cassandra (26%) compared with those in an “advanced” stage (10%) in “in process” (5%).</p>
</div>
<div class="paragraph">
<p>Cassandra predominates in very important or mission critical apps. Among practitioners, 31% use Cassandra for their mission critical applications, 55% for their very important applications, 38% for their somewhat important applications, and 20% for their least important applications.</p>
</div>
<div class="quoteblock">
<blockquote>
<div class="paragraph">
<p>“We’re scheduling 100s of millions of messages to be sent. Per day. If it’s two weeks, we’re talking about a couple billion. So for this, we use Cassandra.” - Practitioner, Amsterdam</p>
</div>
</blockquote>
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<div class="content">
<img src="../_images/blog/blog-post-usage-report-2020/image4.jpg" alt="Cassandra Usage">
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</div>
</div>
<div class="sect2">
<h3 id="why-cassandra"><a class="anchor" href="#why-cassandra"></a>Why Cassandra?</h3>
<div class="paragraph">
<p>The top reasons practitioners use Cassandra for mission critical apps are “good hybrid solutions” (62%), “very secure” (60%), “highly scalable” (57%), “fast” (57%), and “easy to build apps with” (55%).</p>
</div>
<div class="quoteblock">
<blockquote>
<div class="paragraph">
<p>“High traffic, high data environments where really you’re just looking for very simplistic key value persistence of your data. It’s going to be a great fit for you, I can promise that.” - Global SVP Engineering</p>
</div>
</blockquote>
</div>
<div class="imageblock">
<div class="content">
<img src="../_images/blog/blog-post-usage-report-2020/image5.jpg" alt="Top reasons practitioners use Cassandra">
</div>
</div>
<div class="paragraph">
<p>For companies in a highly advanced stage of digital transformation, 58% cite “won’t lose data” as the top reason, followed by “gives me confidence” (56%), “cloud native” (56%), and “very secure” (56%).</p>
</div>
<div class="quoteblock">
<blockquote>
<div class="paragraph">
<p>“It can’t lose anything, it has to be able to capture everything. It can’t have any security defects. It needs to be somewhat compatible with the environment. If we adopt a new database, it can’t be a duplicate of the data we already have.… So: Cassandra.” - Practitioner, San Francisco</p>
</div>
</blockquote>
</div>
<div class="paragraph">
<p>However, 36% of practitioners currently using Cassandra for mission critical apps say that a lack of Cassandra-skilled team members may deter adoption.</p>
</div>
<div class="quoteblock">
<blockquote>
<div class="paragraph">
<p>“We don’t have time to train a ton of developers, so that time to deploy, time to onboard, that’s really key. All the other stuff, scalability, that all sounds fine.” – Practitioner, London</p>
</div>
</blockquote>
</div>
<div class="paragraph">
<p>When asked what it would take for practitioners to use Cassandra for more applications and features in production, they said “easier to migrate” and “easier to integrate.”</p>
</div>
<div class="quoteblock">
<blockquote>
<div class="paragraph">
<p>“If I can get started and be productive in 30 minutes, it’s a no brainer.”
- Practitioner, London</p>
</div>
</blockquote>
</div>
</div>
<div class="sect2">
<h3 id="conclusion"><a class="anchor" href="#conclusion"></a>Conclusion</h3>
<div class="paragraph">
<p>We invite anyone who is curious about Cassandra to test the <a href="Introducing-Apache-Cassandra-4-Beta-Battle-Tested-From-Day-One.html" class="page" target="_blank" rel="noopener">4.0 beta release</a>. There will be no new features or breaking API changes in future Beta or GA builds, so you can expect the time you put into the beta to translate into transitioning your production workloads to 4.0.</p>
</div>
<div class="paragraph">
<p>We also invite you to participate in a short survey about <a href="https://docs.google.com/forms/d/e/1FAIpQLScdoTCMxsDwRzt-U898fVmeksBlAf5fud2GVsGqC0T_IQz2Tg/viewform?usp=sf_link" target="_blank" rel="noopener">Kubernetes and Cassandra</a> that is open through September 24, 2020. Details will be shared with the Cassandra Kubernetes SIG after it closes.</p>
</div>
</div>
<div class="sect2">
<h3 id="survey-credits"><a class="anchor" href="#survey-credits"></a>Survey Credits</h3>
<div class="paragraph">
<p>A volunteer from the community helped analyze the report, which was conducted by ClearPath Strategies, a strategic consulting and research firm, and donated to the community by DataStax. It is available for use under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).</p>
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