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        <title><![CDATA[Stories by AWONGA Julien on Medium]]></title>
        <description><![CDATA[Stories by AWONGA Julien on Medium]]></description>
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            <title>Stories by AWONGA Julien on Medium</title>
            <link>https://medium.com/@julienawonga?source=rss-83de103554cb------2</link>
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            <title><![CDATA[The Essentials of Apache Iceberg]]></title>
            <link>https://medium.com/@julienawonga/the-essentials-of-apache-iceberg-60f014d6a160?source=rss-83de103554cb------2</link>
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            <category><![CDATA[data-engineering]]></category>
            <category><![CDATA[data]]></category>
            <category><![CDATA[apache]]></category>
            <dc:creator><![CDATA[AWONGA Julien]]></dc:creator>
            <pubDate>Thu, 14 Mar 2024 09:52:13 GMT</pubDate>
            <atom:updated>2024-03-14T09:52:13.335Z</atom:updated>
            <content:encoded><![CDATA[<figure><img alt="" src="https://cdn-images-1.medium.com/max/225/1*2vYN1rH3oWjdP8ljRfhBYg.png" /></figure><p>Apache Iceberg is an open-source table format for huge analytics datasets, which aims to improve on the limitations of older data storage solutions like Hive tables. It provides a more efficient and reliable way to handle large-scale data across various computing environments. Here’s a breakdown of what it is, what it isn’t, and the problems it solves:</p><h3>What Apache Iceberg Is:</h3><p>1. Open Table Format for Big Data: Designed to improve data reliability, efficiency, and performance when dealing with large-scale datasets.</p><p>2. Scalable and Performant: Efficiently handles both large datasets and large numbers of files, making it suitable for big data processing.</p><p>3. Support for ACID Transactions: Ensures data integrity by supporting atomic, consistent, isolated, and durable (ACID) transactions, even in distributed computing environments.</p><p>4. Schema Evolution: Allows for changes to the data schema without breaking existing queries or data pipelines, making data management more flexible.</p><p>5. Hidden Partitioning: Simplifies data querying and management by abstracting the complexity of partitioning away from users.</p><p>6. Snapshot Isolation: Enables consistent data snapshots, ensuring that queries return reliable results even as the underlying data changes.</p><h3>What Apache Iceberg Isn’t:</h3><p>1. Not a Data Storage System: Iceberg does not store data itself; it’s a table format. It requires an underlying data storage system (like HDFS, S3, GCS) to store the actual data.</p><p>2. Not a Data Processing Engine: It doesn’t process data. Instead, it integrates with data processing engines (like Spark, Flink, or Trino) to read and write data efficiently.</p><p>3. Not Limited to a Specific Ecosystem: While it provides integrations for popular big data tools, it’s designed to be used across various computing environments, not tied to a single platform.</p><h3>Problems It Resolves:</h3><p>1. Data Consistency and Reliability: Overcomes the limitations of previous formats that struggled with maintaining consistency in the face of concurrent writes and reads.</p><p>2. Performance Issues: Addresses performance bottlenecks associated with handling large datasets, such as metadata scalability issues and costly schema evolution.</p><p>3. Complexity in Data Management: Simplifies data management tasks like partitioning, evolving schemas, and maintaining snapshots, which were more complex in older systems.</p><h3>What Was Used Before It:</h3><p>Before Apache Iceberg, many organizations relied on traditional data warehouse solutions and file formats like Hive tables (using formats such as ORC or Parquet). These systems and formats were often challenged by the evolving needs of big data processing in terms of scalability, performance, and data reliability. Apache Iceberg was developed to address these challenges, offering a more modern solution that fits the needs of large-scale data processing and analytics.</p><p>Apache Iceberg represents a significant evolution in the way big data is managed and processed, offering solutions to longstanding problems associated with data scalability, reliability, and performance.</p><p>I’m Julien AWONGA, Machine Learning Engineer, Data Engineer &amp; Cloud Architect. Follow me , and let’s connect on <a href="https://linkedin.com/in/julienawonga">LinkedIn</a></p><img src="https://medium.com/_/stat?event=post.clientViewed&referrerSource=full_rss&postId=60f014d6a160" width="1" height="1" alt="">]]></content:encoded>
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            <title><![CDATA[Racing Toward Success: My Journey in the AWS DeepRacer Student League]]></title>
            <link>https://medium.com/@julienawonga/racing-toward-success-my-journey-in-the-aws-deepracer-student-league-66e6c692784e?source=rss-83de103554cb------2</link>
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            <category><![CDATA[machine-learning]]></category>
            <category><![CDATA[deepracer-league]]></category>
            <category><![CDATA[aws]]></category>
            <category><![CDATA[reinforcement-learning]]></category>
            <dc:creator><![CDATA[AWONGA Julien]]></dc:creator>
            <pubDate>Thu, 28 Sep 2023 11:30:29 GMT</pubDate>
            <atom:updated>2023-09-28T11:30:29.336Z</atom:updated>
            <content:encoded><![CDATA[<h3>My Journey in the AWS DeepRacer Student League: From Passion to Performance</h3><h3>Introduction</h3><p>I am Julien AWON’GA, a second-year student in the Big Data and Artificial Intelligence program at ISGA. My passion for machine learning and my fascination with games naturally led me to participate in the AWS DeepRacer Student League competition. This unique competition started in March and has been an unforgettable experience, filled with challenges and learning opportunities.</p><h3>Understanding AWS DeepRacer</h3><p>AWS DeepRacer is much more than a mere autonomous car racing competition. It is a stimulating learning arena for AI enthusiasts. Participants have the opportunity to design, train, and test their own machine learning models to drive virtual autonomous cars on complex tracks.</p><p>To learn more about AWS DeepRacer and how it works, you can check out the following links:</p><p><a href="https://aws.amazon.com/deepracer/student/?nc=sn&amp;loc=4">AWS DeepRacer Student League</a></p><ul><li><a href="https://aws.amazon.com/deepracer/">AWS DeepRacer Website</a></li><li><a href="https://docs.aws.amazon.com/deepracer/latest/developerguide/what-is-deepracer.html">AWS DeepRacer Documentation</a></li></ul><iframe src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.youtube.com%2Fembed%2FQ_ky7CP7hZM%3Ffeature%3Doembed&amp;display_name=YouTube&amp;url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DQ_ky7CP7hZM&amp;image=https%3A%2F%2Fi.ytimg.com%2Fvi%2FQ_ky7CP7hZM%2Fhqdefault.jpg&amp;key=a19fcc184b9711e1b4764040d3dc5c07&amp;type=text%2Fhtml&amp;schema=youtube" width="854" height="480" frameborder="0" scrolling="no"><a href="https://medium.com/media/dd632cfc1afad358264797b7004db78b/href">https://medium.com/media/dd632cfc1afad358264797b7004db78b/href</a></iframe><h3>My Journey in the Competition</h3><figure><img alt="" src="https://cdn-images-1.medium.com/max/1000/0*qlrV-4lsqP_ChJQk.png" /></figure><p>My Racer Pseudo is @UnstructuredKey</p><h3>The Beginnings (March — April)</h3><p>My AWS DeepRacer Student League journey started with its fair share of challenges. In March, my first attempt resulted in an 11th-place finish out of 11 participants in the Morocco region. At that point, the complexities of the competition seemed insurmountable. In April, I took a step back, which was necessary to catch my breath and rethink my strategy.</p><p><a href="https://achievements.deepracer.com/share/student/2023/599d8386-1c13-48ec-b91e-397235a9f44c.html?trk=c5e4486f-84b1-49b3-9f40-304d608cf2f3&amp;sc_channel=sm">AWS DeepRacer Student League Participant 2023</a></p><h3>Progression (May — August)</h3><p>In May, perseverance began to pay off. I achieved 3rd place out of 11 in Morocco and 203rd out of 758 in the MEA region. The following months witnessed steady improvement. In June, I secured 1st place out of 12 in Morocco and 103rd out of 586 in the MEA region. July and August were even more fruitful, with respective rankings of 1st out of 10 and 3rd out of 26 in Morocco, along with 126th out of 520 and 73rd out of 676 in the MEA region.</p><ul><li><a href="https://achievements.deepracer.com/share/student/2023/may/d224a9fb-1d55-4b2f-8f19-a720db7ea485.html?trk=a504357e-e8fc-4e22-a534-f27a9f5dd015&amp;sc_channel=sm">3rd Place AWS DeepRacer Student Nationals May 2023</a></li><li><a href="https://achievements.deepracer.com/share/student/2023/june/3114a060-bd1e-4b07-8f6f-96c6f60a0569.html?trk=a504357e-e8fc-4e22-a534-f27a9f5dd015&amp;sc_channel=sm">1st Place AWS DeepRacer Student Nationals June 2023</a></li><li><a href="https://achievements.deepracer.com/share/student/2023/june/e3966519-33b0-4aaf-b841-34331b760586.html?trk=bdeab92d-2e1c-43b3-a4cd-96f714970a7c&amp;sc_channel=sm">Top 10% AWS DeepRacer Student Nationals June 2023</a></li><li><a href="https://achievements.deepracer.com/share/student/2023/july/975317c0-13aa-4199-9980-7c4c6ddb506e.html?trk=a504357e-e8fc-4e22-a534-f27a9f5dd015&amp;sc_channel=sm">1st Place AWS DeepRacer Student Nationals July 2023</a></li><li><a href="https://achievements.deepracer.com/share/student/2023/august/3207ae38-2204-4cb5-8783-a88ccaf3e9c2.html?trk=a504357e-e8fc-4e22-a534-f27a9f5dd015&amp;sc_channel=sm">3rd Place AWS DeepRacer Student Nationals August 2023</a></li></ul><h3>Approaching the Finals (September)</h3><p>As of September 28, I’ve exhausted my 10 hours of racing, but I proudly maintain my 1st place in Morocco (1st out of 26) and an impressive 42nd place out of 868 in the MEA region. The season is nearing its conclusion on September 30, and I’m keeping my fingers crossed for my ranking to remain stable until the end.</p><figure><img alt="" src="https://cdn-images-1.medium.com/max/1024/1*Sz1akgoNmRC3yTjnt2TQ2A.png" /></figure><h3>Rewards and Opportunities</h3><p>Participating in the AWS DeepRacer Student League not only provides a unique learning opportunity but also the chance to win attractive prizes:</p><ul><li>Race Virtually in the Student League (March to September): Every month, you can compare your performance with other competitors in your country, region, and worldwide. Climb the leaderboard each month for a chance to win prizes.</li><li>Advance to the Student Championship (October): The top 42 competitors from around the world will have the opportunity to participate in the 2023 Student World Championship, with the chance to win up to $21,000 in tuition-based prizes.</li><li>Apply to the AI &amp; ML Scholarship Program: In addition to the DeepRacer Student League prizes, students who are underserved or underrepresented in the tech field can apply for the AWS AI &amp; ML Scholarship Program with the opportunity to earn up to two Udacity nanodegree scholarships, each valued at $4,000.</li></ul><h3>Tips for Future Participants</h3><p>For those considering joining the AWS DeepRacer Student League, I’d like to share some tips. Perseverance is key, as is continuous learning. Take the time to understand each track in detail, as the competition offers more than just rankings — it represents a unique learning opportunity.</p><h3>Conclusion</h3><p>My journey in the AWS DeepRacer Student League has been an exciting adventure, marked by challenges overcome and well-deserved successes. I hope this story will inspire other enthusiasts to dive into machine learning through unique experiences like this one.</p><img src="https://medium.com/_/stat?event=post.clientViewed&referrerSource=full_rss&postId=66e6c692784e" width="1" height="1" alt="">]]></content:encoded>
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            <title><![CDATA[The Data Scientist Job(1)]]></title>
            <link>https://medium.com/@julienawonga/data-scientist-role-1-dd24bf461c1a?source=rss-83de103554cb------2</link>
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            <category><![CDATA[data-scientist]]></category>
            <category><![CDATA[data]]></category>
            <category><![CDATA[big-data]]></category>
            <category><![CDATA[data-science]]></category>
            <dc:creator><![CDATA[AWONGA Julien]]></dc:creator>
            <pubDate>Fri, 07 Oct 2022 11:37:40 GMT</pubDate>
            <atom:updated>2022-10-07T12:03:40.965Z</atom:updated>
            <content:encoded><![CDATA[<figure><img alt="" src="https://cdn-images-1.medium.com/max/1024/0*q9sjk2KvedF6EpRZ" /><figcaption>Photo by <a href="https://unsplash.com/@homajob?utm_source=medium&amp;utm_medium=referral">Scott Graham</a> on <a href="https://unsplash.com/?utm_source=medium&amp;utm_medium=referral">Unsplash</a></figcaption></figure><p>The role of data scientist is a relatively new role in the industry. It has only been around for about a decade, but it is already one of the most important roles in data-driven organizations. Data scientists are responsible for extracting insights from data and turning them into actionable plans that can improve business outcomes.</p><h3>Skills</h3><p>Data scientists use their skills in <strong>statistics</strong>, computer science, and domain expertise to solve complex problems. They work with large amounts of data to find patterns and relationships that can be used to make predictions or recommendations. Data scientists also develop new algorithms and models to improve the performance of data-driven systems.</p><ul><li>Data Mining, Data Warehousing</li><li>Good applied statistical skills include knowledge of statistical tests, distributions, regression, maximum likelihood estimators, etc. Data-driven companies require someone with a good knowledge of statistics.</li><li>Tableau and Data Visualization/Storytelling</li><li>Programming languages : Python, R, JAVA, Scala, SQL, MATLAB, Pig</li><li>Knowledge of machine learning methods like k-Nearest Neighbors, SVM, Decision Forests and Naive Bayes.</li></ul><p>To be a data scientist, you need to have strong math and programming skills. You must be able to effectively manipulate and analyze data. You must also be able to communicate your findings to others in a clear and concise manner.</p><h3>Education background</h3><p>As the educational requirements for data scientists can vary depending on the specific industry and position they are targeting. However, most data scientists will need at least a bachelor’s degree in a quantitative field such as mathematics, statistics, computer science, or engineering. Additionally, many employers will prefer candidates with advanced degrees in data science or related fields.</p><ul><li>Advanced statistics, predictive analytics</li><li>Advanced object- oriented programming</li><li>Hadoop, MySQL, TensorFlow, Spark</li><li>Machine learning and data modeling</li></ul><img src="https://medium.com/_/stat?event=post.clientViewed&referrerSource=full_rss&postId=dd24bf461c1a" width="1" height="1" alt="">]]></content:encoded>
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