One additional point about relying on Redis for high performance writes: while postgresql supports concurrent writes via many simultaneous connections and resolves any conflicts that may arise, Redis is single-threaded and can only process a single command per server instance at a time. Therefore redis will peak at some high number of OPS and then fall over, blocking all operations.
Excellent point. That's the kinda of thoughts that are important. Both databases can do the job. They have their different pros and cons. This particular blog post focussed a lot on just one of those: speed.
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One additional point about relying on Redis for high performance writes: while postgresql supports concurrent writes via many simultaneous connections and resolves any conflicts that may arise, Redis is single-threaded and can only process a single command per server instance at a time. Therefore redis will peak at some high number of OPS and then fall over, blocking all operations.
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Excellent point.
That's the kinda of thoughts that are important. Both databases can do the job. They have their different pros and cons. This particular blog post focussed a lot on just one of those: speed.