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Designing Instagram

High Scalability

We will use a graph database such as Neo4j to store the information. Additionally, we can use columnar databases like Cassandra to store information like user feeds, activities, and counters. After that, the post gets added to the feed of all the followers in the columnar data storage. Sample Queries supported by Graph Database.

Design 334
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Improved Alerting with Atlas Streaming Eval

The Netflix TechBlog

Ruchir Jha , Brian Harrington , Yingwu Zhao TL;DR Streaming alert evaluation scales much better than the traditional approach of polling time-series databases. It allows us to overcome high dimensionality/cardinality limitations of the time-series database. It opens doors to support more exciting use-cases.

Storage 288
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Optimize your environment: Unveiling Dynatrace Hyper-V extension for enhanced performance and efficient troubleshooting

Dynatrace

Secondly, determining the correct allocation of resources (CPU, memory, storage) to each virtual machine to ensure optimal performance without over-provisioning can be difficult. Firstly, managing virtual networks can be complex as networking in a virtual environment differs significantly from traditional networking.

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Microservices, events, and upside-down databases

O'Reilly Software

The benefits of modeling data as events as a mechanism to evolve our software systems. Back then, the most common pattern I saw for service-based systems was sharing a database among multiple services. As I expanded upon in my book, Building Microservices , a shared database creates a huge coupling point in your architecture.

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MongoDB Rollback: How to Minimize Data Loss

Scalegrid

The process of rolling back involves undoing any write operations on the previous primary member once it rejoins its replica set after experiencing a failover event, ensuring all data remains consistent across the entire group. To potential data loss, a rollback can also lead to inconsistencies within the database itself.

Database 130
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Taskbar Latency and Kernel Calls

Randon ASCII

The first signal is the input events. UIforETW contains an integrated input logger (anonymized enough so that I don’t accidentally steal passwords or personal information) so I could just drill down to the MouseUp events with a Button Type of 2, which represents the right mouse button. Don’t call ReadFile to get 68 bytes.

Latency 79
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Five Data-Loading Patterns To Improve Frontend Performance

Smashing Magazine

The browser receives a JavaScript bundle and static HTML in a payload, then it will render the DOM and add the listeners and events triggers for reactiveness. Caching partially stores your data and is not used as permanent storage. Using the cache as permanent storage is an anti-pattern. Data Event Sourcing.

Cache 126