4 ms·
You make some ok points but it's not hard to see why Redis and Mongo took off. During their hype cycle, they could cluster/shard more easily than RDBs. You co
by jayd16 3y ago
You make some ok points but it's not hard to see why Redis and Mongo took off. During their hype cycle, they could cluster/shard more easily than RDBs. You could just throw hardware at a problem.
- cmrdporcupine 3y agoI think it's an unfortunate history that the boom in popular "high scalability" type applications happened before SSDs became commonplace. Feeling I/O bound and having to "go horizontal" to increase IOPS was something everybody felt they had to do. I remember reaching for Cassandra to solve a problem for a startup that needed to do what seemed like massive concurrent writes; the workload simply saturated what a single Postgres instance could be expected to do. But since then, SSD & nVME happened, and, well it's mind boggling. Just rough numbers. 7200 RPM HD IOPS: ~100 nVME IOPS: ~500,000 Now, one doesn't always have a properly designed storage engine & DB that can take advantage of this huge differential. But what a yawning gap. Solid state storage changed everything. Honestly, horizontal scaling is often reached for too quickly. For redundancy, I get it (but that's more a replication story.) For performance reasons? For most regular OLTP workloads for most average sized website type applications, I am not convinced these days.