Sayed Alesawy

Sayed Alesawy

High Performance MySQL [Ch.7: Advanced MySQL Features]

Jun 19, 202113 min read

So in the previous chapter we discussed query performance optimization techniques such as, improving data access types or restructuring queries. In this chapter will go over some of the advanced features that MySQL has to offer and see how we can lev...

High Performance MySQL [Ch.7: Advanced MySQL Features]

Amazon Aurora: MySQL on Steroids

Jun 15, 20212 min read

A couple of weeks, I published a series of three articles explaining two papers published by the AWS Aurora team. The papers discussed the internal design of Aurora and the design considerations for building high throughput cloud-native database. The...

Amazon Aurora: MySQL on Steroids

Testing Ruby on Rails Applications Using Rspec

Jun 11, 202112 min read

An essential part of any Software Engineer's daily development flow is writing tests. We write tests to: Try different things while developing. To artificially simulate some corner cases that are really hard to produce organically. To gain confidenc...

Testing Ruby on Rails Applications Using Rspec

Finding a Needle in a Haystack: How Facebook Serves Millions of Images per Second

Jun 4, 202116 min read

So a couple of weeks ago, I came across a file system called SeaweedFS which is according to their readme: ... is a distributed storage system for blobs, objects, files, and data lake, to store and serve billions of files fast! Blob store has O(1) ...

Finding a Needle in a Haystack: How Facebook Serves Millions of Images per Second

Top 5 Lessons I learned while working with Go for two years

May 22, 202112 min read

So I have been writing Go services for like two years now, both professionally and as personal projects. Using a certain language in numerous projects over an extended period of time allows you to make mistakes, fix them, realize it's still not the b...

Top 5 Lessons I learned while working with Go for two years

High Performance MySQL [Ch.6 | Part 2: Query Performance Optimization]

May 19, 202114 min read

So in the last article, we discussed the first part of chapter 6 of High Performance MySQL where we talked about how schema design optimization and indexing are necessary for good performance but not solely enough as you still need to write optimized...

High Performance MySQL [Ch.6 | Part 2: Query Performance Optimization]