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System Design Case Study #5: In-Memory Storage & In-Memory Databases – Storing Application Data In-Memory To Achieve Sub-Second Response Latency</h5>
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System Design Case Study #4: How WalkMe Engineering Scaled their Stateful Service Leveraging Pub-Sub Mechanism</h5>
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A Discussion on Stateless & Stateful Services (Managing User State on the Backend)</h5>
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System Design Case Study #3: How Discord Scaled Their Member Update Feature Benchmarking Different Data Structures</h5>
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System Design Case Study #2: How GitHub Indexes Code For Blazing Fast Search & Retrieval</h5>
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<article id="post-10629" class="post-item post-10629 post type-post status-publish format-standard has-post-thumbnail hentry category-system-design"><div class="post-container">
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<img width="585" height="344" src="/wp-content/uploads/2020/07/In-memory-database-microservices-585x344.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="In-memory database microservices" decoding="async" fetchpriority="high" srcset="/wp-content/uploads/2020/07/In-memory-database-microservices-585x344.png 585w, /wp-content/uploads/2020/07/In-memory-database-microservices-300x176.png 300w, /wp-content/uploads/2020/07/In-memory-database-microservices-1024x602.png 1024w, /wp-content/uploads/2020/07/In-memory-database-microservices-768x451.png 768w, /wp-content/uploads/2020/07/In-memory-database-microservices-1536x902.png 1536w, /wp-content/uploads/2020/07/In-memory-database-microservices-2048x1203.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
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<a href="/in-memory/" class="post-title"><h2> System Design Case Study #5: In-Memory Storage & In-Memory Databases – Storing Application Data In-Memory To Achieve Sub-Second Response Latency</h2> </a><div class="post-content">
In the last few write-ups on this blog, I’ve dug deep into the aspect of storing application data in-memory to reduce the service response latency. I started with a discussion on Slack’s real-time messaging architecture. Slack sends millions of messages daily across millions of Slack...</div>
<div class="post-meta"><div class="post-meta-content">
<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
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<span class="post-readtime">
<i class="icon icon-clock"></i>
8 min <span>read</span> </span>
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</div>
</div></article><article id="post-10570" class="post-item post-10570 post type-post status-publish format-standard has-post-thumbnail hentry category-distributed-systems category-real-world-architecture category-system-design tag-walkme"><div class="post-container">
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<img width="585" height="323" src="/wp-content/uploads/2020/07/Pub-sub-model-cluster-state-585x323.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Synching cluster state with publish subscribe pattern" decoding="async" srcset="/wp-content/uploads/2020/07/Pub-sub-model-cluster-state-585x323.png 585w, /wp-content/uploads/2020/07/Pub-sub-model-cluster-state-300x166.png 300w, /wp-content/uploads/2020/07/Pub-sub-model-cluster-state-1024x566.png 1024w, /wp-content/uploads/2020/07/Pub-sub-model-cluster-state-768x424.png 768w, /wp-content/uploads/2020/07/Pub-sub-model-cluster-state-1536x848.png 1536w, /wp-content/uploads/2020/07/Pub-sub-model-cluster-state-2048x1131.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/scaling-a-stateful-service/" class="post-overlay"></a>
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<a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/real-world-architecture/">Real World Architecture</a>, <a href="/category/system-design/">System Design</a>
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<a href="/scaling-a-stateful-service/" class="post-title"><h2> System Design Case Study #4: How WalkMe Engineering Scaled their Stateful Service Leveraging Pub-Sub Mechanism</h2> </a><div class="post-content">
WalkMe Engineering had a stateful monolith service handling an average of 22.5 million monthly requests, peaking upto 30 million. The service managed this massive load sustained by vertical scaling but started to show cracks as a single monolith server can be vertically scaled only so...</div>
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<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
</span>
<span class="post-readtime">
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11 min <span>read</span> </span>
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</div></article><article id="post-10532" class="post-item post-10532 post type-post status-publish format-standard has-post-thumbnail hentry category-real-world-architecture category-ui tag-stack-overflow"><div class="post-container">
<div class="post-thumbnail">
<img width="585" height="336" src="/wp-content/uploads/2020/07/Modern-UI-development-585x336.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Modern UI development and deployment" decoding="async" srcset="/wp-content/uploads/2020/07/Modern-UI-development-585x336.png 585w, /wp-content/uploads/2020/07/Modern-UI-development-300x172.png 300w, /wp-content/uploads/2020/07/Modern-UI-development-1024x588.png 1024w, /wp-content/uploads/2020/07/Modern-UI-development-768x441.png 768w, /wp-content/uploads/2020/07/Modern-UI-development-1536x882.png 1536w, /wp-content/uploads/2020/07/Modern-UI-development-2048x1175.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/svelte-at-stack-overflow/" class="post-overlay"></a>
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<div class="post-categories-container"><div class="post-categories">
<a href="/category/real-world-architecture/">Real World Architecture</a>, <a href="/category/ui/">UI</a>
</div></div>
<a href="/svelte-at-stack-overflow/" class="post-title"><h2> Why Stack Overflow Picked Svelte for their Overflow AI Feature And the Website UI</h2> </a><div class="post-content">
Stack Overflow is a .NET-based monolithic application with JQuery heavily used on the UI along with the Razor templating engine for creating dynamic web pages. JQuery in today’s UI dev landscape has almost phased out. Modern browsers have evolved their native APIs to the point...</div>
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<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
</span>
<span class="post-readtime">
<i class="icon icon-clock"></i>
10 min <span>read</span> </span>
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</div>
</div></article><article id="post-10494" class="post-item post-10494 post type-post status-publish format-standard has-post-thumbnail hentry category-architecture category-distributed-systems category-system-design"><div class="post-container">
<div class="post-thumbnail">
<img width="585" height="306" src="/wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache-585x306.jpg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Stateful application user state replication via distributed cache" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache-585x306.jpg 585w, /wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache-300x157.jpg 300w, /wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache-1024x536.jpg 1024w, /wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache-768x402.jpg 768w, /wp-content/uploads/2020/07/User-state-cluster-replication-distributed-cache.jpg 1200w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/stateless-and-stateful-services/" class="post-overlay"></a>
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<div class="post-categories-container"><div class="post-categories">
<a href="/category/architecture/">Architecture</a>, <a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/system-design/">System Design</a>
</div></div>
<a href="/stateless-and-stateful-services/" class="post-title"><h2> A Discussion on Stateless & Stateful Services (Managing User State on the Backend)</h2> </a><div class="post-content">
In most articles I come across on stateless and stateful services, stateful service architectures are viewed less favorably in contrast to stateless services primarily due to the horizontal scalability challenge they bring along. It is always recommended to implement a stateless service architecture as opposed...</div>
<div class="post-meta"><div class="post-meta-content">
<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
</span>
<span class="post-readtime">
<i class="icon icon-clock"></i>
8 min <span>read</span> </span>
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</div>
</div></article><article id="post-10426" class="post-item post-10426 post type-post status-publish format-standard has-post-thumbnail hentry category-distributed-systems category-real-world-architecture category-system-design tag-discord"><div class="post-container">
<div class="post-thumbnail">
<img width="585" height="329" src="/wp-content/uploads/2020/07/Discord-member-list-feature-585x329.jpg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Discord member list update feature" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/Discord-member-list-feature-585x329.jpg 585w, /wp-content/uploads/2020/07/Discord-member-list-feature-300x169.jpg 300w, /wp-content/uploads/2020/07/Discord-member-list-feature-1024x576.jpg 1024w, /wp-content/uploads/2020/07/Discord-member-list-feature-768x432.jpg 768w, /wp-content/uploads/2020/07/Discord-member-list-feature-1536x864.jpg 1536w, /wp-content/uploads/2020/07/Discord-member-list-feature-1200x675.jpg 1200w, /wp-content/uploads/2020/07/Discord-member-list-feature.jpg 1920w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/how-discord-scaled-their-member-update-feature/" class="post-overlay"></a>
</div>
<div class="post-content-container">
<div class="post-categories-container"><div class="post-categories">
<a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/real-world-architecture/">Real World Architecture</a>, <a href="/category/system-design/">System Design</a>
</div></div>
<a href="/how-discord-scaled-their-member-update-feature/" class="post-title"><h2> System Design Case Study #3: How Discord Scaled Their Member Update Feature Benchmarking Different Data Structures</h2> </a><div class="post-content">
The member list update feature in Discord servers became quite a bottleneck in terms of memory & CPU usage because the system had to update the entire member list in every Discord server every time someone joined or left the server, changed their status (online,...</div>
<div class="post-meta"><div class="post-meta-content">
<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
</span>
<span class="post-readtime">
<i class="icon icon-clock"></i>
9 min <span>read</span> </span>
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</div>
</div></article><article id="post-10374" class="post-item post-10374 post type-post status-publish format-standard has-post-thumbnail hentry category-database category-distributed-systems category-real-world-architecture category-system-design tag-github"><div class="post-container">
<div class="post-thumbnail">
<img width="585" height="329" src="/wp-content/uploads/2020/07/GitHub-code-search-engine-585x329.jpg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="GitHub code search engine blackbird" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/GitHub-code-search-engine-585x329.jpg 585w, /wp-content/uploads/2020/07/GitHub-code-search-engine-300x169.jpg 300w, /wp-content/uploads/2020/07/GitHub-code-search-engine-1024x576.jpg 1024w, /wp-content/uploads/2020/07/GitHub-code-search-engine-768x432.jpg 768w, /wp-content/uploads/2020/07/GitHub-code-search-engine-1536x864.jpg 1536w, /wp-content/uploads/2020/07/GitHub-code-search-engine-1200x675.jpg 1200w, /wp-content/uploads/2020/07/GitHub-code-search-engine.jpg 1920w" sizes="(max-width: 585px) 100vw, 585px">
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<a href="/category/database/">Database</a>, <a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/real-world-architecture/">Real World Architecture</a>, <a href="/category/system-design/">System Design</a>
</div></div>
<a href="/system-design-github-code-search-engine/" class="post-title"><h2> System Design Case Study #2: How GitHub Indexes Code For Blazing Fast Search & Retrieval</h2> </a><div class="post-content">
GitHub coded their search engine from scratch in Rust called Project Blackbird because existing off-the-shelf solutions didn’t fit their requirements at the scale they were operating. The engine supports features like searching with identifiers, punctuations, substrings, regular expressions, wildcards, etc., which are specific to code...</div>
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<span class="post-auhor-date">
<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
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<span class="post-readtime">
<i class="icon icon-clock"></i>
10 min <span>read</span> </span>
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</div></article><article id="post-10307" class="post-item post-10307 post type-post status-publish format-standard has-post-thumbnail hentry category-distributed-systems category-real-world-architecture category-system-design tag-slack"><div class="post-container">
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<img width="585" height="340" src="/wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-585x340.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Slack real time messaging architecture" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-585x340.png 585w, /wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-300x174.png 300w, /wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-1024x595.png 1024w, /wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-768x446.png 768w, /wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-1536x892.png 1536w, /wp-content/uploads/2020/07/Slack-real-time-messaging-architecture-s-2048x1189.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/system-design-case-study-real-time-messaging-architecture/" class="post-overlay"></a>
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<a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/real-world-architecture/">Real World Architecture</a>, <a href="/category/system-design/">System Design</a>
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<a href="/system-design-case-study-real-time-messaging-architecture/" class="post-title"><h2> System Design Case Study #1: Exploring Slack’s Real-time Messaging Architecture</h2> </a><div class="post-content">
In this blog post, I explore Slack’s real-time messaging architecture with a discussion on the architectural and system design concepts they leverage to scale and keep the latency low. The study will help us understand the intricacies of real-world web-scale architectures, enhancing our system design...</div>
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<a href="/author/admin/" class="post-author">Shivang</a></span>
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13 min <span>read</span> </span>
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<img width="585" height="307" src="/wp-content/uploads/2023/10/roles-and-stack-share-img-585x307.jpeg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="" decoding="async" loading="lazy" srcset="/wp-content/uploads/2023/10/roles-and-stack-share-img-585x307.jpeg 585w, /wp-content/uploads/2023/10/roles-and-stack-share-img-300x158.jpeg 300w, /wp-content/uploads/2023/10/roles-and-stack-share-img-1024x538.jpeg 1024w, /wp-content/uploads/2023/10/roles-and-stack-share-img-768x403.jpeg 768w, /wp-content/uploads/2023/10/roles-and-stack-share-img.jpeg 1200w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/web-service-associated-it-roles/" class="post-overlay"></a>
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<div class="post-categories-container"><div class="post-categories"><a href="/category/uncategorized/">Uncategorized</a></div></div>
<a href="/web-service-associated-it-roles/" class="post-title"><h2> Web Service & Associated IT Roles</h2> </a><div class="post-content">
Below is the high-level application architecture of a virtual global e-commerce service specializing in selling books to customers worldwide deployed in a data center in a cloud availability zone within a cloud region. The web components (CDN, load balancers, API gateways, microservices, databases, etc.) and...</div>
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<span>
<a href="/author/admin/" class="post-author">Shivang</a></span>
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<i class="icon icon-clock"></i>
1 min <span>read</span> </span>
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</div></article><article id="post-10152" class="post-item post-10152 post type-post status-publish format-standard has-post-thumbnail hentry category-architecture category-distributed-systems category-system-design tag-nodejs tag-redis"><div class="post-container">
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<img width="585" height="307" src="/wp-content/uploads/2020/07/single-threaded-event-loop-architecture-585x307.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="Single threaded event loop architecture" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/single-threaded-event-loop-architecture-585x307.png 585w, /wp-content/uploads/2020/07/single-threaded-event-loop-architecture-300x158.png 300w, /wp-content/uploads/2020/07/single-threaded-event-loop-architecture-1024x538.png 1024w, /wp-content/uploads/2020/07/single-threaded-event-loop-architecture-768x403.png 768w, /wp-content/uploads/2020/07/single-threaded-event-loop-architecture-1536x807.png 1536w, /wp-content/uploads/2020/07/single-threaded-event-loop-architecture-2048x1075.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
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<a href="/category/architecture/">Architecture</a>, <a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/system-design/">System Design</a>
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<a href="/single-threaded/" class="post-title"><h2> Single-threaded Event Loop Architecture for Building Asynchronous, Non-Blocking, Highly Concurrent Real-time Services</h2> </a><div class="post-content">
Real-time services like chat apps, MMO (Massive Multiplayer Online) games, financial trading systems, apps with live streaming features, etc., deal with heavy concurrent traffic and real-time data. These services are I/O bound as they spend a major chunk of resources handling input-output operations such as...</div>
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<a href="/author/admin/" class="post-author">Shivang</a></span>
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9 min <span>read</span> </span>
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<img width="585" height="363" src="/wp-content/uploads/2020/07/service-level-agreement-red-585x363.png" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="SLA (Service Level Agreement)" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/service-level-agreement-red-585x363.png 585w, /wp-content/uploads/2020/07/service-level-agreement-red-300x186.png 300w, /wp-content/uploads/2020/07/service-level-agreement-red-1024x635.png 1024w, /wp-content/uploads/2020/07/service-level-agreement-red-768x476.png 768w, /wp-content/uploads/2020/07/service-level-agreement-red-1536x953.png 1536w, /wp-content/uploads/2020/07/service-level-agreement-red-2048x1270.png 2048w" sizes="(max-width: 585px) 100vw, 585px">
<a href="/sla-service-level-agreement/" class="post-overlay"></a>
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<div class="post-categories-container"><div class="post-categories">
<a href="/category/cloud/">Cloud</a>, <a href="/category/distributed-systems/">Distributed Systems</a>
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<a href="/sla-service-level-agreement/" class="post-title"><h2> Understanding SLA (Service Level Agreement) In Cloud Services: How Is SLA Calculated In Large-Scale Services?</h2> </a><div class="post-content">
An SLA (Service Level Agreement) is a contract or agreement between a service provider and the consumer that defines the expectations a consumer should have from the service provided by the service provider. An SLA helps maintain service standards and establishes service providers’ accountability towards...</div>
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<a href="/author/admin/" class="post-author">Shivang</a></span>
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<span class="post-readtime">
<i class="icon icon-clock"></i>
10 min <span>read</span> </span>
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</div></article><article id="post-9968" class="post-item post-9968 post type-post status-publish format-standard has-post-thumbnail hentry category-cloud category-database category-distributed-systems category-system-design tag-scylladb"><div class="post-container">
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<img width="585" height="343" src="/wp-content/uploads/2020/07/NoSQL-database-architecture-585x343.jpeg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="NoSQL database architecture" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/NoSQL-database-architecture-585x343.jpeg 585w, /wp-content/uploads/2020/07/NoSQL-database-architecture-300x176.jpeg 300w, /wp-content/uploads/2020/07/NoSQL-database-architecture-1024x600.jpeg 1024w, /wp-content/uploads/2020/07/NoSQL-database-architecture-768x450.jpeg 768w, /wp-content/uploads/2020/07/NoSQL-database-architecture.jpeg 1336w" sizes="(max-width: 585px) 100vw, 585px">
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<a href="/category/cloud/">Cloud</a>, <a href="/category/database/">Database</a>, <a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/system-design/">System Design</a>
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<a href="/database-architecture-part-two/" class="post-title"><h2> Database Architecture – Part 2 – NoSQL DB Architecture with ScyllaDB (Shard Per Core Design)</h2> </a><div class="post-content">
In the first post of database architecture, I discussed the internal architecture of databases/database management systems, taking a peek into the architectures of MySQL and CockroachDB databases. In another article, a continuation of that article, I discussed how modern cloud servers run parallel compute to...</div>
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<a href="/author/admin/" class="post-author">Shivang</a></span>
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5 min <span>read</span> </span>
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<img width="585" height="343" src="/wp-content/uploads/2020/07/shared-nothing-architecture-585x343.jpeg" class="attachment-gillion-masonry size-gillion-masonry wp-post-image" alt="shared nothing architecture" decoding="async" loading="lazy" srcset="/wp-content/uploads/2020/07/shared-nothing-architecture-585x343.jpeg 585w, /wp-content/uploads/2020/07/shared-nothing-architecture-300x176.jpeg 300w, /wp-content/uploads/2020/07/shared-nothing-architecture-1024x600.jpeg 1024w, /wp-content/uploads/2020/07/shared-nothing-architecture-768x450.jpeg 768w, /wp-content/uploads/2020/07/shared-nothing-architecture.jpeg 1336w" sizes="(max-width: 585px) 100vw, 585px">
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<a href="/category/cloud/">Cloud</a>, <a href="/category/database/">Database</a>, <a href="/category/distributed-systems/">Distributed Systems</a>, <a href="/category/system-design/">System Design</a>
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<a href="/parallel-processing/" class="post-title"><h2> Parallel Processing: How Modern Cloud Servers Leverage Different System Architectures to Optimize Parallel Compute</h2> </a><div class="post-content">
Modern cloud servers leverage several system architectures to process data parallelly, which increases throughput, minimizes latency and optimizes resource consumption. In this article, I’ll discuss those system architectures and we’ll get an insight into how distributed services leverage these architectures to scale. With that being said....</div>
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