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Author Archives: pristinecrap
Application Rightsizing on AWS
Cmpute.io is a platform which reduces your AWS EC2 spend across three main areas: Instance Optimization – usage of Spot, Reserved and On-Demand instances Time Optimization – schedule start and stop of instances Performance Optimization – analyse application performance and … Continue reading
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5 Little Known Facts About Spot Instances
Spot Instances are deeply discounted compute capacity that can provide up to 90% savings over On-demand instances. In other words, for the same budget you get 2-10x times the compute capacity. This is lucrative for enterprises running compute intensive workloads … Continue reading
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Spot vs On-Demand: Which is better in a highly variable environment?
Be honest: Hasn’t this question crossed your mind often? I am sure it has because it has crossed mine. What’s the answer then, you ask? I would always say: “Go for Spot!” In this post, I will explain how to … Continue reading
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DynamoDB: An Inside Look Into NoSQL – Part 7
In Part 6, we discussed handling failures via Hinted Handoff & Replica Synchronization. We also talked about the advantages of using a Sloppy Quorum and Merkle Trees. In this last & final part of the series, we will look into … Continue reading
Posted in Technical
Tagged aws, dynamodb internals, failure detection, gossip-based protocol, ring membership
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DynamoDB: An Inside Look Into NoSQL – Part 6
In Part 5, we spoke about data versioning, the 2 reconciliation strategies and how vector clocks are used for the same. In this article, we will talk about Handling Failures. Handling Failures – Hinted Handoff Even under the simplest of … Continue reading
Posted in Technical
Tagged dynamodb, dynamodb internals, handling failures, hinted handoff, merkle tree, replica sync, sloppy quorum
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DynamoDB: An Inside Look Into NoSQL – Part 5
In Part 4, we talked about partitioning and replication in detail. We introduced consistent hashing, virtual nodes and the concept of coordinator nodes and preference list. In this article, we will discuss Data Versioning. Data Versioning Eventual consistency, introduced by … Continue reading
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Tagged data versioning, semantic reconciliation, syntactic reconciliation, vector clocks
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DynamoDB: An Inside Look Into NoSQL – Part 4
In Part 3, we mentioned the various distributed techniques used while architecting NoSQL data stores. A table nicely summarized these techniques and their advantages. In this article, we will go into the details of partitioning and replication. Partitioning As mentioned … Continue reading
DynamoDB: An Inside Look Into NoSQL – Part 3
In Part 2, we looked at Design Considerations of NoSQL and introduced the concept of eventual consistency. In this article, we will introduce the concepts and techniques used while architecting a NoSQL system. The core distributed systems techniques employed in … Continue reading
Posted in Technical
Tagged failure handling, membership, partioning, replication, scaling, versioning
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DynamoDB: An Inside Look Into NoSQL – Part 2
In Part 1, we introduced you to NoSQL, spoke about the CAP theorem and certain assumptions that need to be made while designing NoSQL data stores. Let’s dive deeper! Design Considerations Traditional commercial systems and applications perform data replication in … Continue reading
DynamoDB: An Inside Look Into NoSQL – Part 1
In our earlier posts (here and here), we introduced the Hadoop ecosystem & explained its various components using a real world example of the retail industry. We now possess a fair idea of the advantages of Big Data. NoSQL datastores … Continue reading
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