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Consistency over Availability: How rqlite Handles the CAP theorem

Consistency Over Availability: How rqlite Handles the CAP Theorem rqlite is a lightweight, user-friendly, open-source, distributed relational database. It’s written in Go and uses SQLite as its storage engine. When it comes to distributed systems the CAP theorem is an essential concept. It states that it’s impossible for a distributed database to simultaneously provide Consistency, Availability, and Partition tolerance. The challenge is in the face of a network partition, a database can only b

Fast and cheap bulk storage: using LVM to cache HDDs on SSDs

Since the inception of solid-state drives (SSDs), there has been a choice to make—either use SSDs for vastly superior speeds, especially with non-sequential read and writes (“random I/O”), or use legacy spinning rust hard disk drives (HDDs) for cheaper storage that’s a bit slow for sequential I/O and painfully slow for random I/O. The idea of caching frequently used data on SSDs and storing the rest on HDDs is nothing new—solid-state hybrid drives (SSHDs) embodied this idea in hardware form, wh